[{"publication_identifier":{"issn":["0939-1533","1432-0681"]},"author":[{"full_name":"Gerlach, Jan","last_name":"Gerlach","first_name":"Jan"},{"full_name":"Schulte, Robin","last_name":"Schulte","first_name":"Robin"},{"first_name":"Alexander","last_name":"Schowtjak","full_name":"Schowtjak, Alexander"},{"full_name":"Clausmeyer, Till","first_name":"Till","last_name":"Clausmeyer"},{"full_name":"Ostwald, Richard","last_name":"Ostwald","first_name":"Richard","orcid":"0000-0003-2147-8444","id":"106876"},{"first_name":"A. Erman","last_name":"Tekkaya","full_name":"Tekkaya, A. Erman"},{"full_name":"Menzel, Andreas","last_name":"Menzel","first_name":"Andreas"}],"year":"2024","title":"Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification","intvolume":" 94","date_updated":"2025-12-03T12:50:41Z","publication_status":"published","language":[{"iso":"eng"}],"doi":"10.1007/s00419-024-02634-1","issue":"8","publication":"Archive of Applied Mechanics","abstract":[{"lang":"eng","text":"AbstractThe open-source parameter identification tool ADAPT (A diversely applicable parameter identification Tool) is integrated with a machine learning-based approach for start value prediction in order to calibrate a Gurson–Tvergaard–Needleman (GTN) and a Lemaitre damage model. As representative example case-hardened steel 16MnCrS5 is elaborated. An artificial neural network (ANN) is initially trained by using load–displacement curves derived from simulations of a boundary value problem—instead of using data generated for homogeneous states of deformation at material point or one-element level—with varying material parameter combinations. The ANN is then employed so as to predict sets of material parameters that already provide close solutions to the experiment. These predicted parameter sets serve as starting values for a subsequent multi-objective parameter identification by using ADAPT. ADAPT allows for the consideration of input data from multiple scales, including integral data such as load–displacement curves, full-field data such as displacement and strain fields, and high-resolution experimental void data at the micro-scale. The influence of each data set on prediction quality is analyzed. Using various types of input data introduces additional information, enhancing prediction accuracy. The validation is carried out with respect to experimental void measurements of forward rod extruded parts. The results demonstrate, by incorporating void measurements in the optimization process, that it is possible to improve the quantitative prediction of ductile damage in the sense of void area fractions by factor 28 in forward rod extrusion."}],"date_created":"2025-12-03T12:46:31Z","department":[{"_id":"952"},{"_id":"321"}],"type":"journal_article","status":"public","publisher":"Springer Science and Business Media LLC","_id":"62770","page":"2217-2242","volume":94,"user_id":"85414","citation":{"ama":"Gerlach J, Schulte R, Schowtjak A, et al. Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification. Archive of Applied Mechanics. 2024;94(8):2217-2242. doi:10.1007/s00419-024-02634-1","bibtex":"@article{Gerlach_Schulte_Schowtjak_Clausmeyer_Ostwald_Tekkaya_Menzel_2024, title={Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification}, volume={94}, DOI={10.1007/s00419-024-02634-1}, number={8}, journal={Archive of Applied Mechanics}, publisher={Springer Science and Business Media LLC}, author={Gerlach, Jan and Schulte, Robin and Schowtjak, Alexander and Clausmeyer, Till and Ostwald, Richard and Tekkaya, A. Erman and Menzel, Andreas}, year={2024}, pages={2217–2242} }","mla":"Gerlach, Jan, et al. “Enhancing Damage Prediction in Bulk Metal Forming through Machine Learning-Assisted Parameter Identification.” Archive of Applied Mechanics, vol. 94, no. 8, Springer Science and Business Media LLC, 2024, pp. 2217–42, doi:10.1007/s00419-024-02634-1.","short":"J. Gerlach, R. Schulte, A. Schowtjak, T. Clausmeyer, R. Ostwald, A.E. Tekkaya, A. Menzel, Archive of Applied Mechanics 94 (2024) 2217–2242.","chicago":"Gerlach, Jan, Robin Schulte, Alexander Schowtjak, Till Clausmeyer, Richard Ostwald, A. Erman Tekkaya, and Andreas Menzel. “Enhancing Damage Prediction in Bulk Metal Forming through Machine Learning-Assisted Parameter Identification.” Archive of Applied Mechanics 94, no. 8 (2024): 2217–42. https://doi.org/10.1007/s00419-024-02634-1.","apa":"Gerlach, J., Schulte, R., Schowtjak, A., Clausmeyer, T., Ostwald, R., Tekkaya, A. E., & Menzel, A. (2024). Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification. Archive of Applied Mechanics, 94(8), 2217–2242. https://doi.org/10.1007/s00419-024-02634-1","ieee":"J. Gerlach et al., “Enhancing damage prediction in bulk metal forming through machine learning-assisted parameter identification,” Archive of Applied Mechanics, vol. 94, no. 8, pp. 2217–2242, 2024, doi: 10.1007/s00419-024-02634-1."},"quality_controlled":"1"},{"abstract":[{"lang":"eng","text":"AbstractNanostructured bilayer thin films with superhydrophobic and superhydrophilic surfaces were prepared using Ti6Al4V alloy substrates which allowed for the comparative analysis of polyvinyl acetate (PVAc) particle adsorption as a function of the interface structure. The PVAc particles were obtained from emulsion polymerization of vinyl acetate. A superhydrophilic TiO2 nanofiber-based 3D network was created on the Ti6Al4V alloy substrate by application of a hydrothermal method. Subsequent UV-grafting of ultra-thin polydimethylsiloxane (PDMS) layers resulted in a superhydrophobic surface. The modification steps were followed via Diffuse Reflectance Infrared Fourier Transform Spectroscopy, X-ray Photoelectron Spectroscopy, Field Emission-Scanning Electron Microscopy, contact angle and Electrochemical Impedance Spectroscopy. A mechanism for the adsorption of PVAc at the two electrolyte/substrate interfaces could be revealed."}],"issue":"6","publication":"Discover Applied Sciences","department":[{"_id":"302"}],"type":"journal_article","date_created":"2025-12-08T08:32:26Z","intvolume":" 6","date_updated":"2025-12-08T08:33:00Z","publication_status":"published","publication_identifier":{"issn":["3004-9261"]},"author":[{"first_name":"Vanessa","orcid":"0000-0001-9416-1646","last_name":"Neßlinger","full_name":"Neßlinger, Vanessa","id":"54649"},{"first_name":"Jan","last_name":"Atlanov","full_name":"Atlanov, Jan"},{"id":"194","last_name":"Grundmeier","first_name":"Guido","full_name":"Grundmeier, Guido"}],"year":"2024","title":"Interactions of polyvinyl acetate dispersions with nanostructured superhydrophilic and superhydrophobic Ti6Al4V alloy surfaces","doi":"10.1007/s42452-024-05916-z","language":[{"iso":"eng"}],"article_number":"294","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"citation":{"ama":"Neßlinger V, Atlanov J, Grundmeier G. Interactions of polyvinyl acetate dispersions with nanostructured superhydrophilic and superhydrophobic Ti6Al4V alloy surfaces. Discover Applied Sciences. 2024;6(6). doi:10.1007/s42452-024-05916-z","bibtex":"@article{Neßlinger_Atlanov_Grundmeier_2024, title={Interactions of polyvinyl acetate dispersions with nanostructured superhydrophilic and superhydrophobic Ti6Al4V alloy surfaces}, volume={6}, DOI={10.1007/s42452-024-05916-z}, number={6294}, journal={Discover Applied Sciences}, publisher={Springer Science and Business Media LLC}, author={Neßlinger, Vanessa and Atlanov, Jan and Grundmeier, Guido}, year={2024} }","mla":"Neßlinger, Vanessa, et al. “Interactions of Polyvinyl Acetate Dispersions with Nanostructured Superhydrophilic and Superhydrophobic Ti6Al4V Alloy Surfaces.” Discover Applied Sciences, vol. 6, no. 6, 294, Springer Science and Business Media LLC, 2024, doi:10.1007/s42452-024-05916-z.","short":"V. Neßlinger, J. Atlanov, G. Grundmeier, Discover Applied Sciences 6 (2024).","chicago":"Neßlinger, Vanessa, Jan Atlanov, and Guido Grundmeier. “Interactions of Polyvinyl Acetate Dispersions with Nanostructured Superhydrophilic and Superhydrophobic Ti6Al4V Alloy Surfaces.” Discover Applied Sciences 6, no. 6 (2024). https://doi.org/10.1007/s42452-024-05916-z.","apa":"Neßlinger, V., Atlanov, J., & Grundmeier, G. (2024). Interactions of polyvinyl acetate dispersions with nanostructured superhydrophilic and superhydrophobic Ti6Al4V alloy surfaces. Discover Applied Sciences, 6(6), Article 294. https://doi.org/10.1007/s42452-024-05916-z","ieee":"V. Neßlinger, J. Atlanov, and G. Grundmeier, “Interactions of polyvinyl acetate dispersions with nanostructured superhydrophilic and superhydrophobic Ti6Al4V alloy surfaces,” Discover Applied Sciences, vol. 6, no. 6, Art. no. 294, 2024, doi: 10.1007/s42452-024-05916-z."},"status":"public","volume":6,"user_id":"54649","publisher":"Springer Science and Business Media LLC","_id":"62942"},{"publication":"SIAM Journal on Control and Optimization","citation":{"mla":"Berger, Thomas, et al. “Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance.” SIAM Journal on Control and Optimization, 2024.","ama":"Berger T, Dennstädt D, Lanza L, Worthmann K. Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance. SIAM Journal on Control and Optimization. Published online 2024.","bibtex":"@article{Berger_Dennstädt_Lanza_Worthmann_2024, title={Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance}, journal={SIAM Journal on Control and Optimization}, author={Berger, Thomas and Dennstädt, Dario and Lanza, L. and Worthmann, K. }, year={2024} }","apa":"Berger, T., Dennstädt, D., Lanza, L., & Worthmann, K. (2024). Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance. SIAM Journal on Control and Optimization.","ieee":"T. Berger, D. Dennstädt, L. Lanza, and K. Worthmann, “Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance,” SIAM Journal on Control and Optimization, 2024.","chicago":"Berger, Thomas, Dario Dennstädt, L. Lanza, and K. Worthmann. “Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance.” SIAM Journal on Control and Optimization, 2024.","short":"T. Berger, D. Dennstädt, L. Lanza, K. Worthmann, SIAM Journal on Control and Optimization (2024)."},"type":"journal_article","department":[{"_id":"618"}],"date_created":"2024-04-03T10:08:01Z","date_updated":"2026-01-05T20:52:17Z","year":"2024","title":"Robust Funnel Model Predictive Control for Output Tracking with Prescribed Performance","status":"public","author":[{"full_name":"Berger, Thomas","last_name":"Berger","first_name":"Thomas","id":"77457"},{"id":"98033","first_name":"Dario","last_name":"Dennstädt","full_name":"Dennstädt, Dario"},{"full_name":"Lanza, L. ","last_name":"Lanza","first_name":"L. "},{"last_name":"Worthmann","first_name":"K. ","full_name":"Worthmann, K. "}],"user_id":"77457","language":[{"iso":"eng"}],"_id":"53146"},{"doi":"10.1109/DMC62632.2024.10812131","user_id":"83383","language":[{"iso":"eng"}],"_id":"63497","page":"1-8","date_updated":"2026-01-06T08:07:50Z","author":[{"first_name":"Nikolas","last_name":"Förster","full_name":"Förster, Nikolas"},{"first_name":"Oliver","last_name":"Wallscheid","full_name":"Wallscheid, Oliver"},{"last_name":"Schafmeister","first_name":"Frank","full_name":"Schafmeister, Frank"}],"title":"Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection","status":"public","year":"2024","department":[{"_id":"52"}],"type":"conference","keyword":["MOSFET","Thermal resistance","Surface resistance","Bridge circuits","Zero voltage switching","Pareto optimization","Capacitance","Numerical simulation","Optimization","Resistance heating","Pareto Optimization","Dual-Active Bridge","ZVS","Inductor Optimization","Transformer Optimization","Heat Sink Optimization"],"date_created":"2026-01-06T08:06:24Z","citation":{"bibtex":"@inproceedings{Förster_Wallscheid_Schafmeister_2024, title={Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection}, DOI={10.1109/DMC62632.2024.10812131}, booktitle={2024 IEEE Design Methodologies Conference (DMC)}, author={Förster, Nikolas and Wallscheid, Oliver and Schafmeister, Frank}, year={2024}, pages={1–8} }","ama":"Förster N, Wallscheid O, Schafmeister F. Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection. In: 2024 IEEE Design Methodologies Conference (DMC). ; 2024:1-8. doi:10.1109/DMC62632.2024.10812131","mla":"Förster, Nikolas, et al. “Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection.” 2024 IEEE Design Methodologies Conference (DMC), 2024, pp. 1–8, doi:10.1109/DMC62632.2024.10812131.","chicago":"Förster, Nikolas, Oliver Wallscheid, and Frank Schafmeister. “Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection.” In 2024 IEEE Design Methodologies Conference (DMC), 1–8, 2024. https://doi.org/10.1109/DMC62632.2024.10812131.","short":"N. Förster, O. Wallscheid, F. Schafmeister, in: 2024 IEEE Design Methodologies Conference (DMC), 2024, pp. 1–8.","ieee":"N. Förster, O. Wallscheid, and F. Schafmeister, “Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection,” in 2024 IEEE Design Methodologies Conference (DMC), 2024, pp. 1–8, doi: 10.1109/DMC62632.2024.10812131.","apa":"Förster, N., Wallscheid, O., & Schafmeister, F. (2024). Dual-Active Bridge Sequential Pareto Optimization for Fast Pre-Design and Final Component Selection. 2024 IEEE Design Methodologies Conference (DMC), 1–8. https://doi.org/10.1109/DMC62632.2024.10812131"},"publication":"2024 IEEE Design Methodologies Conference (DMC)"},{"type":"book_chapter","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"place":"Cham","date_created":"2024-11-18T10:24:06Z","quality_controlled":"1","abstract":[{"text":"This paper deals with the modeling of a soft sensor for detecting α’-martensite evolution from the micromagnetic signals that are measured during the reverse flow forming of metastable AISI 304L austenitic steel. This model can be prospectively used inside a closed-loop property-controlled flow forming process. To achieve this, optimization by means of a non-linear regression of experimental data was carried out. To collect the experimental data, specimens were produced by flow forming seamless tubes at room temperature. Using a combination of production parameters (like the infeed depth and feed rate), specimens with different α’-martensite contents and wall-thickness reductions were produced. An equation to compute α’-martensite from both specific production-process parameters and micromagnetic Barkhausen noise (MBN) measurements was obtained using numerical methods. In this process, the behavior of the quantity of interest (namely, the α’-martensite content) was mathematically evaluated with respect to non-destructive MBN data and the feed rate that was used to produce the components. A combination of exponential and potential functions was defined as the ansatz functions of the model. The obtained model was validated online and offline during the real flow forming of workpieces, obtaining average deviations of up to 7% α’-martensite with respect to the model. The implementation of the soft sensor model for property-controlled production represents an important milestone for producing high-added-value components on the basis of a well-understood process-microstructure-property relationship.","lang":"eng"}],"publication":"Lecture Notes in Mechanical Engineering","citation":{"ieee":"J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, and F. Walther, “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L,” in Lecture Notes in Mechanical Engineering, Cham: Springer International Publishing, 2024.","apa":"Rozo Vasquez, J., Kersting, L., Arian, B., Homberg, W., Trächtler, A., & Walther, F. (2024). Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In Lecture Notes in Mechanical Engineering. Springer International Publishing. https://doi.org/10.1007/978-3-031-58006-2_10","chicago":"Rozo Vasquez, Julian , Lukas Kersting, Bahman Arian, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” In Lecture Notes in Mechanical Engineering. Cham: Springer International Publishing, 2024. https://doi.org/10.1007/978-3-031-58006-2_10.","short":"J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, F. Walther, in: Lecture Notes in Mechanical Engineering, Springer International Publishing, Cham, 2024.","mla":"Rozo Vasquez, Julian, et al. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” Lecture Notes in Mechanical Engineering, Springer International Publishing, 2024, doi:10.1007/978-3-031-58006-2_10.","bibtex":"@inbook{Rozo Vasquez_Kersting_Arian_Homberg_Trächtler_Walther_2024, place={Cham}, title={Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L}, DOI={10.1007/978-3-031-58006-2_10}, booktitle={Lecture Notes in Mechanical Engineering}, publisher={Springer International Publishing}, author={Rozo Vasquez, Julian and Kersting, Lukas and Arian, Bahman and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }","ama":"Rozo Vasquez J, Kersting L, Arian B, Homberg W, Trächtler A, Walther F. Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In: Lecture Notes in Mechanical Engineering. Springer International Publishing; 2024. doi:10.1007/978-3-031-58006-2_10"},"doi":"10.1007/978-3-031-58006-2_10","user_id":"41470","_id":"57190","language":[{"iso":"eng"}],"publisher":"Springer International Publishing","date_updated":"2024-11-18T10:39:03Z","publication_status":"published","year":"2024","title":"Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L","status":"public","publication_identifier":{"issn":["2195-4356","2195-4364"],"isbn":["9783031580055","9783031580062"]},"author":[{"first_name":"Julian ","last_name":"Rozo Vasquez","full_name":"Rozo Vasquez, Julian "},{"full_name":"Kersting, Lukas","last_name":"Kersting","first_name":"Lukas"},{"first_name":"Bahman","last_name":"Arian","full_name":"Arian, Bahman","id":"36287"},{"id":"233","last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner"},{"id":"552","full_name":"Trächtler, Ansgar","first_name":"Ansgar","last_name":"Trächtler"},{"full_name":"Walther, Frank","first_name":"Frank","last_name":"Walther"}]},{"author":[{"full_name":"Reiling, Fabian","last_name":"Reiling","first_name":"Fabian"},{"first_name":"Christian","last_name":"Henke","full_name":"Henke, Christian"},{"full_name":"Hunstig, Matthias","last_name":"Hunstig","first_name":"Matthias"},{"full_name":"Gröger, Stefan","first_name":"Stefan","last_name":"Gröger"},{"id":"552","full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar"}],"status":"public","year":"2024","title":"Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding","date_updated":"2024-11-18T10:40:23Z","publication_status":"published","language":[{"iso":"eng"}],"_id":"57185","publisher":"IEEE","doi":"10.1109/aim55361.2024.10637123","user_id":"41470","citation":{"chicago":"Reiling, Fabian, Christian Henke, Matthias Hunstig, Stefan Gröger, and Ansgar Trächtler. “Batch Constrained Multi-Objective Bayesian Optimization Using the Example of Ultrasonic Wire Bonding.” In 2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2024. https://doi.org/10.1109/aim55361.2024.10637123.","short":"F. Reiling, C. Henke, M. Hunstig, S. Gröger, A. Trächtler, in: 2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), IEEE, 2024.","apa":"Reiling, F., Henke, C., Hunstig, M., Gröger, S., & Trächtler, A. (2024). Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding. 2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM). https://doi.org/10.1109/aim55361.2024.10637123","ieee":"F. Reiling, C. Henke, M. Hunstig, S. Gröger, and A. Trächtler, “Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding,” 2024, doi: 10.1109/aim55361.2024.10637123.","ama":"Reiling F, Henke C, Hunstig M, Gröger S, Trächtler A. Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding. In: 2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM). IEEE; 2024. doi:10.1109/aim55361.2024.10637123","bibtex":"@inproceedings{Reiling_Henke_Hunstig_Gröger_Trächtler_2024, title={Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding}, DOI={10.1109/aim55361.2024.10637123}, booktitle={2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)}, publisher={IEEE}, author={Reiling, Fabian and Henke, Christian and Hunstig, Matthias and Gröger, Stefan and Trächtler, Ansgar}, year={2024} }","mla":"Reiling, Fabian, et al. “Batch Constrained Multi-Objective Bayesian Optimization Using the Example of Ultrasonic Wire Bonding.” 2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), IEEE, 2024, doi:10.1109/aim55361.2024.10637123."},"publication":"2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)","quality_controlled":"1","date_created":"2024-11-18T10:18:18Z","department":[{"_id":"153"},{"_id":"241"}],"type":"conference"},{"citation":{"chicago":"Henkenjohann, Mark, Udo Nolte, Fabian Sion, Christian Henke, and Ansgar Trächtler. “Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers.” Actuators 13, no. 5 (2024). https://doi.org/10.3390/act13050187.","short":"M. Henkenjohann, U. Nolte, F. Sion, C. Henke, A. Trächtler, Actuators 13 (2024).","apa":"Henkenjohann, M., Nolte, U., Sion, F., Henke, C., & Trächtler, A. (2024). Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers. Actuators, 13(5), Article 187. https://doi.org/10.3390/act13050187","ieee":"M. Henkenjohann, U. Nolte, F. Sion, C. Henke, and A. Trächtler, “Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers,” Actuators, vol. 13, no. 5, Art. no. 187, 2024, doi: 10.3390/act13050187.","ama":"Henkenjohann M, Nolte U, Sion F, Henke C, Trächtler A. Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers. Actuators. 2024;13(5). doi:10.3390/act13050187","bibtex":"@article{Henkenjohann_Nolte_Sion_Henke_Trächtler_2024, title={Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers}, volume={13}, DOI={10.3390/act13050187}, number={5187}, journal={Actuators}, publisher={MDPI AG}, author={Henkenjohann, Mark and Nolte, Udo and Sion, Fabian and Henke, Christian and Trächtler, Ansgar}, year={2024} }","mla":"Henkenjohann, Mark, et al. “Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers.” Actuators, vol. 13, no. 5, 187, MDPI AG, 2024, doi:10.3390/act13050187."},"quality_controlled":"1","_id":"57176","publisher":"MDPI AG","user_id":"41470","volume":13,"status":"public","date_created":"2024-11-18T10:09:58Z","type":"journal_article","department":[{"_id":"153"},{"_id":"241"}],"publication":"Actuators","issue":"5","abstract":[{"lang":"eng","text":"Incremental nonlinear dynamic inversion (INDI) is a widely used approach to controlling UAVs with highly nonlinear dynamics. One key element of INDI-based controllers is the control allocation realizing pseudo controls using available actuators. However, the tracking of commanded pseudo controls is not the only objective considered during control allocation. Since the approach only works locally due to linearization and the solution is often ambiguous, additional aspects like control efforts or penalizing the deviation of certain states must be considered. Conducting the control allocation by solving a quadratic program this results in a considerable number of weighting parameters, which must be tuned during control design. Currently, this is conducted manually and is therefore time consuming. An automated approach for tuning these parameters is therefore highly beneficial. Thus, this paper presents and evaluates a model-based approach automatically tuning the control allocation parameters of a tiltrotor VTOL using an optimization algorithm. This optimization algorithm searches for optimal parameters minimizing a cost functional that reflects the design target. This cost functional is calculated based on a test mission for the VTOL which is conducted within a simulation environment. The test mission represents the common operating range of the VTOL. The simulation environment consists of an aircraft model as well as a model of the INDI-based controller which is dependent on the control allocation parameters. On this basis, model-based optimization is conducted and the optimal parameters are identified. Finally, successful real-world tests on a 4-degrees-of-freedom testbench using the identified parameters are presented. Since the control allocation parameters can significantly influence the aircraft’s stability, the 4-DOF testbench for the aircraft is required for rapid validation of the parameters at a minimum amount of risk."}],"article_number":"187","language":[{"iso":"eng"}],"doi":"10.3390/act13050187","title":"Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers","year":"2024","publication_identifier":{"issn":["2076-0825"]},"author":[{"last_name":"Henkenjohann","first_name":"Mark","full_name":"Henkenjohann, Mark"},{"full_name":"Nolte, Udo","last_name":"Nolte","first_name":"Udo"},{"last_name":"Sion","first_name":"Fabian","full_name":"Sion, Fabian"},{"full_name":"Henke, Christian","last_name":"Henke","first_name":"Christian"},{"first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552"}],"date_updated":"2024-11-18T10:42:19Z","publication_status":"published","intvolume":" 13"},{"language":[{"iso":"eng"}],"doi":"10.21741/9781644903254-76","author":[{"id":"36287","last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman"},{"full_name":"Homberg, Werner","last_name":"Homberg","first_name":"Werner","id":"233"},{"full_name":"Kersting, Lukas","first_name":"Lukas","last_name":"Kersting"},{"id":"552","full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar"},{"last_name":"Rozo Vasquez","first_name":"Julian","full_name":"Rozo Vasquez, Julian"},{"full_name":"Walther, Frank","last_name":"Walther","first_name":"Frank"}],"publication_identifier":{"issn":["2474-395X"]},"title":"α’-martensite grading techniques in reverse flow forming of AISI 304L","year":"2024","intvolume":" 44","publication_status":"published","date_updated":"2024-11-18T10:42:55Z","date_created":"2024-11-18T10:06:17Z","department":[{"_id":"241"},{"_id":"153"},{"_id":"156"}],"type":"conference","publication":"Materials Research Proceedings","abstract":[{"lang":"eng","text":"Manufacturing processes benefit from property control enabling reproducibility, application oriented outcomes, and efficient part production. In reverse flow forming, state of the art practices focus primarily on geometry control, neglecting property control. Given the intricacies of the process involving the interaction of tool and machine behavior, process parameters, properties of semi finished products and temperatures, incorporating process control becomes an imperative for producing components with predefined properties. The property controlled within this reverse flow forming process is the local α’ martensite content. Therefore, process strategies to actively influence the α’ martensite content must be implemented. In this study seamless AISI 304L steel tubes are used, where α’ martensite formation is strain and/or temperature induced through phase transformation within the process. This paper presents innovative process strategies, methods, and specially developed mechanical and thermal actuator systems to locally increase or suppress the α’ martensite content. The use and implementation of these approaches and tools allows the creation of unique optically invisible microstructure profiles containing 3D gradings, implying a radial grading of α’ martensite. The locally implemented α’ martensite, forming these 3D gradings, offers potential applications for functional or sensory purposes. This paper extends beyond theoretical concepts, providing tangible component outcomes."}],"publisher":"Materials Research Forum LLC","_id":"57173","volume":44,"user_id":"41470","status":"public","citation":{"short":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.","chicago":"Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” In Materials Research Proceedings, Vol. 44. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903254-76.","ieee":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “α’-martensite grading techniques in reverse flow forming of AISI 304L,” in Materials Research Proceedings, 2024, vol. 44, doi: 10.21741/9781644903254-76.","apa":"Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2024). α’-martensite grading techniques in reverse flow forming of AISI 304L. Materials Research Proceedings, 44. https://doi.org/10.21741/9781644903254-76","bibtex":"@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2024, title={α’-martensite grading techniques in reverse flow forming of AISI 304L}, volume={44}, DOI={10.21741/9781644903254-76}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}, year={2024} }","ama":"Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. α’-martensite grading techniques in reverse flow forming of AISI 304L. In: Materials Research Proceedings. Vol 44. Materials Research Forum LLC; 2024. doi:10.21741/9781644903254-76","mla":"Arian, Bahman, et al. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” Materials Research Proceedings, vol. 44, Materials Research Forum LLC, 2024, doi:10.21741/9781644903254-76."},"quality_controlled":"1"},{"title":"Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications","year":"2024","status":"public","conference":{"location":"Paderborn","name":"Quantum Photonics Spotlight ","start_date":"2024,10,08","end_date":"2024,10,10"},"author":[{"id":"42449","first_name":"Martin Miroslavov","last_name":"Mihaylov","full_name":"Mihaylov, Martin Miroslavov"},{"first_name":"Christian","last_name":"Kress","full_name":"Kress, Christian","id":"13256"},{"id":"37144","full_name":"Scheytt, J. Christoph","orcid":"0000-0002-5950-6618 ","first_name":"J. Christoph","last_name":"Scheytt"}],"date_updated":"2024-11-15T14:01:51Z","language":[{"iso":"eng"}],"_id":"57111","user_id":"42449","citation":{"mla":"Mihaylov, Martin Miroslavov, et al. Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications. 2024.","ama":"Mihaylov MM, Kress C, Scheytt JC. Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications. In: ; 2024.","bibtex":"@inproceedings{Mihaylov_Kress_Scheytt_2024, title={Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications}, author={Mihaylov, Martin Miroslavov and Kress, Christian and Scheytt, J. Christoph}, year={2024} }","apa":"Mihaylov, M. M., Kress, C., & Scheytt, J. C. (2024). Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications. Quantum Photonics Spotlight , Paderborn.","ieee":"M. M. Mihaylov, C. Kress, and J. C. Scheytt, “Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications,” presented at the Quantum Photonics Spotlight , Paderborn, 2024.","chicago":"Mihaylov, Martin Miroslavov, Christian Kress, and J. Christoph Scheytt. “Simulation and Optimization of Low-Loss Photonic Coupling Structures for TFLN Integrated Circuits for Quantum Applications,” 2024.","short":"M.M. Mihaylov, C. Kress, J.C. Scheytt, in: 2024."},"date_created":"2024-11-15T13:47:10Z","type":"conference_abstract","department":[{"_id":"58"},{"_id":"623"}]},{"publication_status":"published","date_updated":"2024-11-26T10:52:50Z","title":"Relevance of high glycaemic index breakfast for heart rate variability among collegiate students with early and late chronotypes","year":"2024","status":"public","publication_identifier":{"issn":["0742-0528","1525-6073"]},"author":[{"full_name":"Krueger, Bettina","orcid":"0000-0001-5351-1785","last_name":"Krueger","first_name":"Bettina","id":"49428"},{"first_name":"Bianca","last_name":"Stutz","full_name":"Stutz, Bianca","id":"77099"},{"orcid":"0000-0002-9385-0834","last_name":"Jakobsmeyer","first_name":"Rasmus","full_name":"Jakobsmeyer, Rasmus","id":"9583"},{"id":"48978","full_name":"Reinsberger, Claus","first_name":"Claus","last_name":"Reinsberger"},{"id":"65985","last_name":"Buyken","first_name":"Anette E.","full_name":"Buyken, Anette E."}],"user_id":"49428","doi":"10.1080/07420528.2024.2428203","page":"1-10","_id":"57429","publisher":"Informa UK Limited","language":[{"iso":"eng"}],"publication":"Chronobiology International","citation":{"bibtex":"@article{Krueger_Stutz_Jakobsmeyer_Reinsberger_Buyken_2024, title={Relevance of high glycaemic index breakfast for heart rate variability among collegiate students with early and late chronotypes}, DOI={10.1080/07420528.2024.2428203}, journal={Chronobiology International}, publisher={Informa UK Limited}, author={Krueger, Bettina and Stutz, Bianca and Jakobsmeyer, Rasmus and Reinsberger, Claus and Buyken, Anette E.}, year={2024}, pages={1–10} }","ama":"Krueger B, Stutz B, Jakobsmeyer R, Reinsberger C, Buyken AE. Relevance of high glycaemic index breakfast for heart rate variability among collegiate students with early and late chronotypes. Chronobiology International. Published online 2024:1-10. doi:10.1080/07420528.2024.2428203","mla":"Krueger, Bettina, et al. “Relevance of High Glycaemic Index Breakfast for Heart Rate Variability among Collegiate Students with Early and Late Chronotypes.” Chronobiology International, Informa UK Limited, 2024, pp. 1–10, doi:10.1080/07420528.2024.2428203.","short":"B. Krueger, B. Stutz, R. Jakobsmeyer, C. Reinsberger, A.E. Buyken, Chronobiology International (2024) 1–10.","chicago":"Krueger, Bettina, Bianca Stutz, Rasmus Jakobsmeyer, Claus Reinsberger, and Anette E. Buyken. “Relevance of High Glycaemic Index Breakfast for Heart Rate Variability among Collegiate Students with Early and Late Chronotypes.” Chronobiology International, 2024, 1–10. https://doi.org/10.1080/07420528.2024.2428203.","ieee":"B. Krueger, B. Stutz, R. Jakobsmeyer, C. Reinsberger, and A. E. Buyken, “Relevance of high glycaemic index breakfast for heart rate variability among collegiate students with early and late chronotypes,” Chronobiology International, pp. 1–10, 2024, doi: 10.1080/07420528.2024.2428203.","apa":"Krueger, B., Stutz, B., Jakobsmeyer, R., Reinsberger, C., & Buyken, A. E. (2024). Relevance of high glycaemic index breakfast for heart rate variability among collegiate students with early and late chronotypes. Chronobiology International, 1–10. https://doi.org/10.1080/07420528.2024.2428203"},"type":"journal_article","department":[{"_id":"35"},{"_id":"22"}],"date_created":"2024-11-26T10:51:33Z"},{"user_id":"34289","publisher":"IEEE","_id":"54356","status":"public","conference":{"location":"Darmstadt, Germany","start_date":"2024-09-02","name":"ECCE Europe 2024","end_date":"2024-09-06"},"place":"Darmstadt","citation":{"short":"R. Unruh, J. Böcker, F. Schafmeister, in: ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe, IEEE, Darmstadt, n.d.","chicago":"Unruh, Roland, Joachim Böcker, and Frank Schafmeister. “Experimentally Verified 22 KW, 40 KHz LLC Resonant Converter Design with New Control for a 1 MW Cascaded H-Bridge Converter.” In ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe. Darmstadt: IEEE, n.d. https://doi.org/10.1109/ECCEEurope62508.2024.10751954.","ieee":"R. Unruh, J. Böcker, and F. Schafmeister, “Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter,” presented at the ECCE Europe 2024, Darmstadt, Germany, doi: https://doi.org/10.1109/ECCEEurope62508.2024.10751954.","apa":"Unruh, R., Böcker, J., & Schafmeister, F. (n.d.). Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter. ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe. ECCE Europe 2024, Darmstadt, Germany. https://doi.org/10.1109/ECCEEurope62508.2024.10751954","bibtex":"@inproceedings{Unruh_Böcker_Schafmeister, place={Darmstadt}, title={Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter}, DOI={https://doi.org/10.1109/ECCEEurope62508.2024.10751954}, booktitle={ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe}, publisher={IEEE}, author={Unruh, Roland and Böcker, Joachim and Schafmeister, Frank} }","ama":"Unruh R, Böcker J, Schafmeister F. Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter. In: ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe. IEEE. doi:https://doi.org/10.1109/ECCEEurope62508.2024.10751954","mla":"Unruh, Roland, et al. “Experimentally Verified 22 KW, 40 KHz LLC Resonant Converter Design with New Control for a 1 MW Cascaded H-Bridge Converter.” ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe, IEEE, doi:https://doi.org/10.1109/ECCEEurope62508.2024.10751954."},"doi":"https://doi.org/10.1109/ECCEEurope62508.2024.10751954","main_file_link":[{"url":"https://ieeexplore.ieee.org/abstract/document/10751954"}],"language":[{"iso":"eng"}],"publication_status":"accepted","date_updated":"2024-11-28T14:16:05Z","title":"Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter","year":"2024","author":[{"id":"34289","first_name":"Roland","last_name":"Unruh","full_name":"Unruh, Roland"},{"full_name":"Böcker, Joachim","first_name":"Joachim","last_name":"Böcker","orcid":"0000-0002-8480-7295","id":"66"},{"id":"71291","last_name":"Schafmeister","first_name":"Frank","full_name":"Schafmeister, Frank"}],"publication_identifier":{"isbn":["979-8-3503-6444-6"]},"type":"conference","keyword":["Cascaded H-Bridge","Converter Losses","Decentralized Control","Full-Bridge Converter","LLC Resonant Converter"],"department":[{"_id":"52"}],"date_created":"2024-05-19T14:26:29Z","abstract":[{"text":"Although there are numerous design and control methodologies for the LLC resonant converter,\r\nthey often do not consider decentralized control strategies to operate them as isolated DC-DC converters within a\r\ncascaded H-bridge. The total output power of all LLC converters must be constant to supply a load such as a wa-\r\nter electrolyzer. However, each individual LLC converter can vary its output power as long as the total output\r\npower remains constant. This opens new possibilities in increasing the system efficiency and robustness. Usually,\r\nthe DC-link voltage of each module capacitor shows a 2nd harmonic voltage ripple. However, the total stored energy\r\nin all DC-link capacitors is constant within a grid period for a balanced three-phase system. By controlling each\r\nLLC converter’s output power locally to be proportional to the energy stored in its DC-link capacitor, modules with\r\na lower instantaneous DC-link voltage transfer less power to the load than modules with a higher DC-link voltage.\r\nAs a result, a higher efficiency, voltage gain and lower peak resonant capacitor voltage can be achieved with the\r\nsame components. The 22.2kW experimental prototype of the LLC converter reaches an efficiency of over 97% at\r\nresonance which is similar to the precalculated value.","lang":"eng"}],"publication":"ECCE Europe 2024; IEEE Energy Conversion Congress & Exposition Europe"},{"date_created":"2024-12-09T09:07:06Z","file":[{"date_created":"2024-12-09T09:05:36Z","creator":"nerea","file_id":"57649","content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2024-12-09T09:05:36Z","file_name":"HSLT2402W.pdf","file_size":3949565,"access_level":"closed"}],"type":"journal_editor","publication":"die hochschullehre","abstract":[{"lang":"ger","text":"Das Themenheft präsentiert forschende und strategische Perspektiven auf eine postdigitale Hochschullehre. Die COVID-19-Pandemie führte zu einer grundlegenden Umgestaltung der Hochschullehre und wirkte als Katalysator für die Gestaltung digital unterstützender Innovationen in der Hochschullehre. Unter dem Schlagwort postdigiale Hochschullehre beschäftigten sich die vorliegenden Beiträge der dghd-Tagung 2022 mit diesem veränderten Lehren und Lernen."}],"language":[{"iso":"ger"}],"doi":"10.3278/HSLT2402W","year":"2024","title":"Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre","intvolume":" 10","publication_status":"published","date_updated":"2024-12-09T09:07:12Z","citation":{"ama":"Vöing N, ed. Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre. Vol 10.; 2024. doi:10.3278/HSLT2402W","bibtex":"@book{Vöing_2024, title={Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre}, volume={10}, DOI={10.3278/HSLT2402W}, journal={die hochschullehre}, year={2024} }","mla":"Vöing, Nerea, editor. “Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre.” die hochschullehre, vol. 10, 2024, doi:10.3278/HSLT2402W.","chicago":"Vöing, Nerea, ed. Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre. die hochschullehre. Vol. 10, 2024. https://doi.org/10.3278/HSLT2402W.","short":"N. Vöing, ed., Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre, 2024.","apa":"Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre. (2024). In N. Vöing (Ed.), die hochschullehre (Vol. 10). https://doi.org/10.3278/HSLT2402W","ieee":"N. Vöing, Ed., Transformationen. Forschende und strategische Perspektiven auf eine postdigitale Hochschullehre, vol. 10. 2024."},"file_date_updated":"2024-12-09T09:05:36Z","_id":"57648","volume":10,"editor":[{"id":"5054","first_name":"Nerea","last_name":"Vöing","full_name":"Vöing, Nerea"}],"user_id":"5054","ddc":["370"],"conference":{"end_date":"9.9.2022","start_date":"6.9.2022","name":"22. Jahrestagung der Deutschen Gesellschaft für Hochschuldidaktik","location":"Paderborn"},"status":"public","has_accepted_license":"1"},{"author":[{"first_name":"Arne Thorsten","last_name":"Rüting","full_name":"Rüting, Arne Thorsten"}],"title":"Echtzeitfähige modellprädiktive Planung zeitoptimierter Trajektorien für kinematisch redundante Mechanismen auf industrieller Hardware","status":"public","year":"2024","date_updated":"2025-02-12T07:34:43Z","publication_status":"published","language":[{"iso":"eng"}],"_id":"58450","main_file_link":[{"url":"https://digital.ub.uni-paderborn.de/doi/10.17619/UNIPB/1-2112","open_access":"1"}],"doi":"10.17619/UNIPB/1-2112","user_id":"82875","supervisor":[{"full_name":"Trächtler, Ansgar","first_name":"Ansgar","last_name":"Trächtler","id":"552"},{"last_name":"Bertram","first_name":"Torsten","full_name":"Bertram, Torsten"}],"citation":{"ama":"Rüting AT. Echtzeitfähige Modellprädiktive Planung Zeitoptimierter Trajektorien Für Kinematisch Redundante Mechanismen Auf Industrieller Hardware.; 2024. doi:10.17619/UNIPB/1-2112","bibtex":"@book{Rüting_2024, title={Echtzeitfähige modellprädiktive Planung zeitoptimierter Trajektorien für kinematisch redundante Mechanismen auf industrieller Hardware}, DOI={10.17619/UNIPB/1-2112}, author={Rüting, Arne Thorsten}, year={2024} }","mla":"Rüting, Arne Thorsten. Echtzeitfähige Modellprädiktive Planung Zeitoptimierter Trajektorien Für Kinematisch Redundante Mechanismen Auf Industrieller Hardware. 2024, doi:10.17619/UNIPB/1-2112.","short":"A.T. Rüting, Echtzeitfähige Modellprädiktive Planung Zeitoptimierter Trajektorien Für Kinematisch Redundante Mechanismen Auf Industrieller Hardware, 2024.","chicago":"Rüting, Arne Thorsten. Echtzeitfähige Modellprädiktive Planung Zeitoptimierter Trajektorien Für Kinematisch Redundante Mechanismen Auf Industrieller Hardware, 2024. https://doi.org/10.17619/UNIPB/1-2112.","apa":"Rüting, A. T. (2024). Echtzeitfähige modellprädiktive Planung zeitoptimierter Trajektorien für kinematisch redundante Mechanismen auf industrieller Hardware. https://doi.org/10.17619/UNIPB/1-2112","ieee":"A. T. Rüting, Echtzeitfähige modellprädiktive Planung zeitoptimierter Trajektorien für kinematisch redundante Mechanismen auf industrieller Hardware. 2024."},"abstract":[{"text":"Die vorliegende Arbeit befasst sich mit der modellprädiktiven Planung zeitoptimierter Trajektorien für mehrachsige kinematisch redundante Mechanismen. Es werden zunächst grundlegende Begriffe erläutert, bevor der Stand der Wissenschaft und Technik hinsichtlich der Trajektorienplanung von kinematisch redundanten und nicht-redundanten Mechanismen sowie der Ausführung von Optimierungen auf Industriesteuerungen vorgestellt wird. Im Anschluss wird die modellprädiktive Planung erläutert. Diese nutzt die Mehrdeutigkeit bei der Ermittlung der Gelenkpositionen kinematisch redundanter Mechanismen, um die Verfahrzeit zwischen Sollpositionen im Rahmen von Punkt-zu-Punkt-Bewegungen zu minimieren. Anhand eines kinematisch redundanten hybridkinematischen Mechanismus erfolgt zunächst eine simulative Validierung des Ansatzes. Bezogen auf die immer flexibler werdenden Fertigungen im Kontext Losgröße-1 sind jedoch echtzeitfähige selbstoptimierende Steuerungen erforderlich, die sich zur Laufzeit auf wechselnde Aufgaben einstellen und mit weiteren Systemen interagieren. Aus diesem Grund liegt der Fokus auf der echtzeitfähigen Ausführung des Ansatzes auf einer Industriesteuerung, ein entscheidender Punkt, um die erforderliche Flexibilität und industrielle Einsetzbarkeit zu erreichen und gleichzeitig ein signifikanter Unterschied zum Stand der Technik. Hierzu erfolgt die Umsetzung auf das reale System und der Nachweis der echtzeitfähigen Ausführung mit Optimierungszeiten kleiner einer Millisekunde.","lang":"eng"},{"text":"This thesis deals with the model-predictive planning of time-optimized trajectories for kinematically redundant multi-axes mechanisms. First, basic terms are explained before the current state-of-science and technology with regard to path planning for kinematically redundant and non-redundant mechanisms as well as the execution of optimizations on industrial controllers is presented. Next, the model-predictive planning is explained. Hereby, the ambiguity when calculating the joint positions of a kinematically redundant mechanism is used to minimize the movement time between set points with regard to point-to-point movements. Using a kinematically redundant hybrid mechanism, the approach is first validated with simulations. With regard to the increasing demands of more flexible manufacturing in context of batch size-1, real-time capable self-optimizing controls are necessary. Such controls adjust themselves to changing tasks during runtime and interact with other systems. Therefore, the focus is on the real-time execution of the approach on industrial controllers. This is a crucial point to achieve the required flexibility and industrial applicability, as well as to differ significantly from the state-of-the-art. For this purpose, the approach is implemented on the real system and the ability of a real-time execution with optimization times less than one millisecond is proven.","lang":"eng"}],"date_created":"2025-01-30T14:53:50Z","oa":"1","department":[{"_id":"153"},{"_id":"241"}],"type":"dissertation"},{"citation":{"chicago":"Unruh, Roland, Joachim Böcker, and Frank Schafmeister. “Experimentally Verified 22 KW, 40 KHz LLC Resonant Converter Design with New Control for a 1 MW Cascaded H-Bridge Converter.” In Proceedings of the Energy Conversion Congress & Expo (ECCE Europe). IEEE, 2024. https://doi.org/10.1109/ECCEEurope62508.2024.10751954.","short":"R. Unruh, J. Böcker, F. Schafmeister, in: Proceedings of the Energy Conversion Congress & Expo (ECCE Europe), IEEE, 2024.","ieee":"R. Unruh, J. Böcker, and F. Schafmeister, “Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter,” presented at the Energy Conversion Congress & Expo (ECCE Europe), Darmstadt, 2024, doi: 10.1109/ECCEEurope62508.2024.10751954.","apa":"Unruh, R., Böcker, J., & Schafmeister, F. (2024). Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter. Proceedings of the Energy Conversion Congress & Expo (ECCE Europe). Energy Conversion Congress & Expo (ECCE Europe), Darmstadt. https://doi.org/10.1109/ECCEEurope62508.2024.10751954","bibtex":"@inproceedings{Unruh_Böcker_Schafmeister_2024, title={Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter}, DOI={10.1109/ECCEEurope62508.2024.10751954}, booktitle={Proceedings of the Energy Conversion Congress & Expo (ECCE Europe)}, publisher={IEEE}, author={Unruh, Roland and Böcker, Joachim and Schafmeister, Frank}, year={2024} }","ama":"Unruh R, Böcker J, Schafmeister F. Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter. In: Proceedings of the Energy Conversion Congress & Expo (ECCE Europe). IEEE; 2024. doi:10.1109/ECCEEurope62508.2024.10751954","mla":"Unruh, Roland, et al. “Experimentally Verified 22 KW, 40 KHz LLC Resonant Converter Design with New Control for a 1 MW Cascaded H-Bridge Converter.” Proceedings of the Energy Conversion Congress & Expo (ECCE Europe), IEEE, 2024, doi:10.1109/ECCEEurope62508.2024.10751954."},"file_date_updated":"2025-02-14T15:32:17Z","publisher":"IEEE","_id":"58648","user_id":"71291","ddc":["620"],"conference":{"end_date":"2024-09-06","location":"Darmstadt","start_date":"2024-09-02","name":" Energy Conversion Congress & Expo (ECCE Europe)"},"status":"public","has_accepted_license":"1","date_created":"2025-02-14T15:30:36Z","file":[{"file_id":"58649","content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2025-02-14T15:32:17Z","file_name":"EPE_2024_09_02-Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter.pdf","file_size":3829411,"access_level":"closed","date_created":"2025-02-14T15:32:17Z","creator":"schafmei"}],"department":[{"_id":"52"}],"type":"conference","publication":"Proceedings of the Energy Conversion Congress & Expo (ECCE Europe)","language":[{"iso":"eng"}],"doi":"10.1109/ECCEEurope62508.2024.10751954","author":[{"full_name":"Unruh, Roland","first_name":"Roland","last_name":"Unruh","id":"34289"},{"full_name":"Böcker, Joachim ","last_name":"Böcker","first_name":"Joachim "},{"id":"71291","first_name":"Frank","last_name":"Schafmeister","full_name":"Schafmeister, Frank"}],"title":"Experimentally Verified 22 kW, 40 kHz LLC Resonant Converter Design with new Control for a 1 MW Cascaded H-Bridge Converter","year":"2024","publication_status":"published","date_updated":"2025-02-14T15:33:10Z"},{"date_created":"2025-02-18T14:39:06Z","department":[{"_id":"172"}],"type":"journal_article","citation":{"ieee":"A. Benjaminse, E. M. Nijmeijer, A. Gokeler, D. C. Broekhaar, and N. Cortes, “Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention,” Journal of Strength & Conditioning Research, 2024, doi: 10.1519/jsc.0000000000004912.","apa":"Benjaminse, A., Nijmeijer, E. M., Gokeler, A., Broekhaar, D. C., & Cortes, N. (2024). Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention. Journal of Strength & Conditioning Research. https://doi.org/10.1519/jsc.0000000000004912","chicago":"Benjaminse, Anne, Eline M. Nijmeijer, Alli Gokeler, Dara C. Broekhaar, and Nelson Cortes. “Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention.” Journal of Strength & Conditioning Research, 2024. https://doi.org/10.1519/jsc.0000000000004912.","short":"A. Benjaminse, E.M. Nijmeijer, A. Gokeler, D.C. Broekhaar, N. Cortes, Journal of Strength & Conditioning Research (2024).","mla":"Benjaminse, Anne, et al. “Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention.” Journal of Strength & Conditioning Research, Ovid Technologies (Wolters Kluwer Health), 2024, doi:10.1519/jsc.0000000000004912.","bibtex":"@article{Benjaminse_Nijmeijer_Gokeler_Broekhaar_Cortes_2024, title={Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention}, DOI={10.1519/jsc.0000000000004912}, journal={Journal of Strength & Conditioning Research}, publisher={Ovid Technologies (Wolters Kluwer Health)}, author={Benjaminse, Anne and Nijmeijer, Eline M. and Gokeler, Alli and Broekhaar, Dara C. and Cortes, Nelson}, year={2024} }","ama":"Benjaminse A, Nijmeijer EM, Gokeler A, Broekhaar DC, Cortes N. Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention. Journal of Strength & Conditioning Research. Published online 2024. doi:10.1519/jsc.0000000000004912"},"publication":"Journal of Strength & Conditioning Research","abstract":[{"lang":"eng","text":"Abstract\r\n Benjaminse, A, Nijmeijer, EM, Gokeler, A, Broekhaar, DC, and Cortes, N. Motivation unraveled: giving choice to football players to improve anterior cruciate ligament injury prevention. J Strength Cond Res XX(X): 000–000, 2024—Providing athletes some control over a training session facilitates motor skill acquisition. This is a promising concept to use in anterior cruciate ligament (ACL) injury prevention, as the key for risk reduction is to improve quality of movement. The goal of this study was to better understand why improved motor learning occurred when football players had the opportunity to choose when to receive feedback when practicing sidestep cutting (SSC) movements. Healthy male recreational football players (n = 22, 22.9 ± 1.7 years, 185.5 ± 7.2 cm, 79.3 ± 9.2 kg) were included and assigned to the self-control (SC) or the yoked (YK) group. The players performed anticipated and unanticipated SSC. They received video instructions and were instructed to “copy the movement of the model to the best of their ability.” During the training blocks, the SC group could ask for feedback, whereas the YK group could not. Cutting movement assessment scores (CMAS) were measured to test quality of movement and the Intrinsic Motivation Inventory was administered to measure constructs of motivation. In the anticipated condition, SC group showed better scores in immediate post and the retention test compared with pretest (p < 0.001), whereas the YK group showed worse scores in the retention test compared with immediate posttest (p = 0.001). Perceived competence (p = 0.017) and self-efficacy (p = 0.032) were consistent factors that correlated with improved CMAS in the SC group. This has given us innovative insights into underlying mechanisms optimizing the quality of movement, necessary to improve current ACL injury prevention approaches."}],"_id":"58695","publisher":"Ovid Technologies (Wolters Kluwer Health)","language":[{"iso":"eng"}],"doi":"10.1519/jsc.0000000000004912","user_id":"46","author":[{"first_name":"Anne","last_name":"Benjaminse","full_name":"Benjaminse, Anne"},{"first_name":"Eline M.","last_name":"Nijmeijer","full_name":"Nijmeijer, Eline M."},{"full_name":"Gokeler, Alli","first_name":"Alli","last_name":"Gokeler"},{"full_name":"Broekhaar, Dara C.","last_name":"Broekhaar","first_name":"Dara C."},{"first_name":"Nelson","last_name":"Cortes","full_name":"Cortes, Nelson"}],"publication_identifier":{"issn":["1064-8011"]},"year":"2024","status":"public","title":"Motivation Unraveled: Giving Choice to Football Players to Improve Anterior Cruciate Ligament Injury Prevention","date_updated":"2025-02-18T14:39:48Z","publication_status":"published"},{"doi":"10.26603/001c.124804","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-02-18T14:51:20Z","intvolume":" 19","year":"2024","title":"Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players","author":[{"full_name":"Rikken, Koen T.H.","first_name":"Koen T.H.","last_name":"Rikken"},{"full_name":"Panneman, Tom","last_name":"Panneman","first_name":"Tom"},{"first_name":"Fabian","last_name":"Vercauteren","full_name":"Vercauteren, Fabian"},{"first_name":"Alli","last_name":"Gokeler","full_name":"Gokeler, Alli"},{"full_name":"Benjaminse, Anne","last_name":"Benjaminse","first_name":"Anne"}],"publication_identifier":{"issn":["2159-2896"]},"type":"journal_article","department":[{"_id":"172"}],"date_created":"2025-02-18T14:51:11Z","abstract":[{"text":" Background In basketball, changing direction is one of the primary mechanisms of anterior cruciate ligament (ACL) injury, often occurring within complex game situations with high cognitive demands. It is unknown how visual attention affects sidestep cutting kinematics during the entire energy absorption phase of the cut in an ecologically valid environment. Purpose The purpose of this research was to study the effect of added cognitive load, in the form of increased visual attentional demands, on sidestep cutting kinematics during the energy absorption phase of the cut in an ecologically valid environment. Study Design Crossover Study Methods Fifteen male basketball players (aged 22.1 ± 2.3) performed ten sidestep cutting movements without (BASE) and with (VIS) a visual attention dual task. 3D kinematics of the hip, knee and ankle were recorded utilizing Xsens IMU motion capture. Temporal kinematics were analyzed using Statistical Parametric Mapping. Discrete time point kinematics were additionally analyzed at initial contact (IC) and at peak knee flexion utilizing paired t-tests. Effect sizes were calculated. Results Hip flexion was significantly reduced in the VIS condition compared to the BASE condition (p<0.01), including at IC (VIS 35.0° ± 7.2°, BASE 40.7° ± 4.9°, p=0.02, d=0.92) and peak (VIS 37.8° ± 9.7°, BASE 45.5° ± 6.9°, p=0.001, d=0.90). Knee flexion was significantly reduced in the VIS condition, in comparison to the BASE condition (p<0.01), at peak (VIS 59.9° ± 7.5°, BASE 64.1° ± 7.4°, p=0.001, d=0.55). Conclusion The addition of visual attention during sidestep cutting altered lower limb kinematics, which may increase ACL injury risk. It is suggested that ACL injury risk screening and prevention should include sidestep cutting with visual attentional demands, in order to mimic the cognitive demands of the sports environment. Level of Evidence 3 ","lang":"eng"}],"publication":"International Journal of Sports Physical Therapy","issue":"11","user_id":"46","volume":19,"_id":"58702","publisher":"International Journal of Sports Physical Therapy","status":"public","citation":{"bibtex":"@article{Rikken_Panneman_Vercauteren_Gokeler_Benjaminse_2024, title={Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players}, volume={19}, DOI={10.26603/001c.124804}, number={11}, journal={International Journal of Sports Physical Therapy}, publisher={International Journal of Sports Physical Therapy}, author={Rikken, Koen T.H. and Panneman, Tom and Vercauteren, Fabian and Gokeler, Alli and Benjaminse, Anne}, year={2024} }","ama":"Rikken KTH, Panneman T, Vercauteren F, Gokeler A, Benjaminse A. Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players. International Journal of Sports Physical Therapy. 2024;19(11). doi:10.26603/001c.124804","mla":"Rikken, Koen T. H., et al. “Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players.” International Journal of Sports Physical Therapy, vol. 19, no. 11, International Journal of Sports Physical Therapy, 2024, doi:10.26603/001c.124804.","chicago":"Rikken, Koen T.H., Tom Panneman, Fabian Vercauteren, Alli Gokeler, and Anne Benjaminse. “Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players.” International Journal of Sports Physical Therapy 19, no. 11 (2024). https://doi.org/10.26603/001c.124804.","short":"K.T.H. Rikken, T. Panneman, F. Vercauteren, A. Gokeler, A. Benjaminse, International Journal of Sports Physical Therapy 19 (2024).","ieee":"K. T. H. Rikken, T. Panneman, F. Vercauteren, A. Gokeler, and A. Benjaminse, “Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players,” International Journal of Sports Physical Therapy, vol. 19, no. 11, 2024, doi: 10.26603/001c.124804.","apa":"Rikken, K. T. H., Panneman, T., Vercauteren, F., Gokeler, A., & Benjaminse, A. (2024). Increased Visual Attentional Demands Alter Lower Extremity Sidestep Cutting Kinematics in Male Basketball Players. International Journal of Sports Physical Therapy, 19(11). https://doi.org/10.26603/001c.124804"}},{"publication":"Advances in Radio Science","type":"journal_article","department":[{"_id":"59"},{"_id":"485"}],"date_created":"2024-11-29T10:05:47Z","date_updated":"2025-03-17T12:13:32Z","publication_status":"published","intvolume":" 22","title":"Using Autoencoders to Classify EMC Problems in Electronic System Development","year":"2024","author":[{"full_name":"Maalouly, J.","last_name":"Maalouly","first_name":"J."},{"full_name":"Hemker, D.","first_name":"D.","last_name":"Hemker"},{"full_name":"Hedayat, C.","last_name":"Hedayat","first_name":"C."},{"full_name":"Olbrich, M.","first_name":"M.","last_name":"Olbrich"},{"orcid":"0009-0007-9150-2266 ","last_name":"Lange","first_name":"Sven","full_name":"Lange, Sven","id":"38240"},{"last_name":"Mathis","first_name":"H.","full_name":"Mathis, H."}],"doi":"10.5194/ars-22-53-2024","main_file_link":[{"url":"https://ars.copernicus.org/articles/22/53/2024/"}],"language":[{"iso":"eng"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"citation":{"bibtex":"@article{Maalouly_Hemker_Hedayat_Olbrich_Lange_Mathis_2024, title={Using Autoencoders to Classify EMC Problems in Electronic System Development}, volume={22}, DOI={10.5194/ars-22-53-2024}, journal={Advances in Radio Science}, author={Maalouly, J. and Hemker, D. and Hedayat, C. and Olbrich, M. and Lange, Sven and Mathis, H.}, year={2024}, pages={53–59} }","ama":"Maalouly J, Hemker D, Hedayat C, Olbrich M, Lange S, Mathis H. Using Autoencoders to Classify EMC Problems in Electronic System Development. Advances in Radio Science. 2024;22:53–59. doi:10.5194/ars-22-53-2024","mla":"Maalouly, J., et al. “Using Autoencoders to Classify EMC Problems in Electronic System Development.” Advances in Radio Science, vol. 22, 2024, pp. 53–59, doi:10.5194/ars-22-53-2024.","chicago":"Maalouly, J., D. Hemker, C. Hedayat, M. Olbrich, Sven Lange, and H. Mathis. “Using Autoencoders to Classify EMC Problems in Electronic System Development.” Advances in Radio Science 22 (2024): 53–59. https://doi.org/10.5194/ars-22-53-2024.","short":"J. Maalouly, D. Hemker, C. Hedayat, M. Olbrich, S. Lange, H. Mathis, Advances in Radio Science 22 (2024) 53–59.","ieee":"J. Maalouly, D. Hemker, C. Hedayat, M. Olbrich, S. Lange, and H. Mathis, “Using Autoencoders to Classify EMC Problems in Electronic System Development,” Advances in Radio Science, vol. 22, pp. 53–59, 2024, doi: 10.5194/ars-22-53-2024.","apa":"Maalouly, J., Hemker, D., Hedayat, C., Olbrich, M., Lange, S., & Mathis, H. (2024). Using Autoencoders to Classify EMC Problems in Electronic System Development. Advances in Radio Science, 22, 53–59. https://doi.org/10.5194/ars-22-53-2024"},"status":"public","conference":{"end_date":"2023-09-28","name":"Kleinheubacher Berichte 2023","start_date":"2023-09-26","location":"Miltenberg"},"user_id":"38240","volume":22,"page":"53–59","_id":"57499"},{"department":[{"_id":"9"},{"_id":"321"},{"_id":"624"},{"_id":"367"}],"type":"journal_article","keyword":["Compoundieren","Fused Filament Fabrication"],"date_created":"2025-03-25T10:18:06Z","abstract":[{"lang":"eng","text":"Füllstoffe erhöhen die Wärmeleitfähigkeit von im Fused Filament Fabrication (FFF) Verfahren hergestellten Strukturen. Neben der Füllstoffart ist dabei der Füllstoffvolumenanteil relevant. Der maximal verarbeitbare Füllstoffanteil ist hier gegenüber vergleichbaren Spritzgussmaterialien reduziert. An der Kunststofftechnik Paderborn (KTP) wurde untersucht, welchen Einfluss spezifische Füllstoffe auf die Materialeigenschaften haben. Die additive Fertigung (AM) gewinnt durch stetig steigende Anforderungen an die Bauteilkomplexität und Fertigungsflexibilität nicht nur im Prototypenbau an Bedeutung [1]. Eines der am weitesten verbreiteten additiven Fertigungsverfahren ist dabei das Fused Filament Fabrication (FFF) Verfahren [2]. Bei diesem Verfahren wird ein Kunststofffilament in eine temperierte Düse gefördert, dort aufgeschmolzen und in einer charakteristischen, näherungsweise elliptischen Stranggeometrie ausgetragen. Durch die Verfahrbewegung der Plastifiziereinheit und der Bauplattform können dreidimensionale Strukturen gefertigt werden [3]. Das FFF-Verfahren zeichnet sich unter anderem durch die Verarbeitung einer großen Bandbreite an thermoplastischen Kunststoffen aus [4]. Dies ermöglicht eine anwendungsspezifische Materialauswahl. In diesem Zusammenhang stellt auch die Modifizierung mit Füllstoffen eine Möglichkeit dar, die Materialeigenschaften gezielt einzustellen. Die Füllstoffe können dabei nach dem jeweiligen Aspektverhältnis in Kugeln, Plättchen oder Fasern unterteilt werden [5]. Die Steigerung der Wärmeleitfähigkeit von im FFF-Verfahren hergestellten Strukturen ist aktuell Stand der Forschung, gewinnt jedoch vor dem Hintergrund der aktuellen Herausforderungen, z. B. in der Elektrotechnik, an Bedeutung [6]. Die Kunststofftechnik Paderborn (KTP) befasst sich am Direct Manufacturing Research Center (DMRC) – Academic derzeit mit der Entwicklung und Verarbeitung wärmeleitfähiger Kunststoffe für das FFF-Verfahren. Der Fokus liegt dabei auf den material- und prozessseitigen Einflüssen auf die Materialeigenschaften. Für die Erzielung hoher Wärmeleitfähigkeiten sind dabei die Wahl der Füllstoffart und des Füllstoffvolumenanteils hervorzuheben. Kenntnisse über die Auswirkungen der Füllstoffzugabe und dem Zusammenspiel zwischen den mechanischen Eigenschaften und der Wärmeleitfähigkeit sind für die anwendungsgerechte Bauteilauslegung essenziell. Das Vorgehen Zur Analyse der Wärmeleitfähigkeit wurde eine am DMRC – Academic entwickelte Methode verwendet. Diese basiert auf der Fertigung von zylindrischen Probekörpern, welche im FFF-Verfahren entlang der Längsachse parallel zu den drei Koordinatenrichtungen X, Y und Z orientiert gefertigt werden. Im Anschluss werden die Probekörper spanend auf das für die Messung erforderliche Maß nachbearbeitet. Dadurch können fertigungsbedingte Einflüsse auf die Geometrie und Oberflächengüte reduziert und damit die Messgenauigkeit erhöht werden (Bild 2). Durch die Fertigung von drei unterschiedlichen Orientierungen kann weiterhin eine resultierende Anisotropie bewertet werden. Die auf einem Doppelschneckenextruder (Thermo Fisher Process11) hergestellten Filamente wurden nachfolgend mit einem Gewo HTP260 (Gewo Feinmechanik) verarbeitet. Die entsprechenden FFF-Prozessparameter sind in Tabelle 1 dargestellt. Dabei ist anzumerken, dass eine Bauraumtemperierung im Allgemeinen und der auf 120 °C beheizte Bauraum für die Verarbeitung der betrachteten Materialien im Speziellen zur prozesssicheren FFF-Fertigung unerlässlich sind. Die Analyse der Wärmeleitfähigkeit erfolgte schließlich mittels der Laser-Flash-Analyse (LFA) (Netzsch LFA 467 HyperFlash) entsprechend der DIN EN ISO 22007-4 [7]. Für die Bewertung der mechanischen Eigenschaften wurden Probekörper entsprechend der DIN EN ISO 527-2 Typ 1BA unter Verwendung einer Kolben-Spritzgussmaschine (Thermo Fisher Mini Jet Pro) gefertigt und mit einer Zugprüfmaschine (Zwick/Roell ProLine Z 010) geprüft, um den grundlegenden Füllstoffeinfluss bewerten zu können [8]. Für die Untersuchungen wurde ein Kunststoff-Compound basierend auf Polybutylenterephthalat (PBT) ohne (PBTx) und mit (PBTxa) Verarbeitungshilfe verwendet. Als Füllstoffe kamen zwei wärmeleitfähige plättchenförmige Füllstoffe (Bezeichnung: F1 und F2) zur Anwendung, welche einen mittleren Partikeldurchmesser (d50) für F1 von 5,0 µm und für F2 von 7,9 µm aufweisen. Ergebnisse der Zugversuche Die Auswertung der mechanischen Eigenschaften zeigt den Einfluss des Füllstoffvolumenanteils anhand des Elastizitätsmoduls und der Bruchdehnung auf (Bild 3). Die resultierende Festigkeit wird durch die geringe Verstärkungswirkung der Plättchen hingegen nur geringfügig beeinflusst und ist folglich nicht gesondert aufgeführt. Im Gegensatz dazu erhöht sich die Steifigkeit mit steigendem Füllstoffvolumenanteil, was auf den erhöhten E-Modul der Füllstoffe gegenüber der Kunststoffmatrix zurückzuführen ist. So kann durch die Füllstoffzugabe mit einem Volumenanteil in Höhe von 22 {%} der E-Modul für das Material PBTxa-F1 gegenüber der reinen Kunststoffmatrix um den Faktor 2,7 gesteigert werden. Hingegen nimmt die Bruchdehnung mit steigendem Füllstoffvolumenanteil ab. Diese mit dem Volumenanteil positiv korrelierende Versprödung stellt einen begrenzenden Faktor bei der Herstellung hochgefüllter Filamente dar. So neigen höher gefüllte Filamente eher zu einem Bruch bei der Herstellung und Verarbeitung. Dies resultiert in den vorliegenden maximalen Füllstoffvolumenanteilen, welche im Vergleich zu Spritzgussmaterialien deutlich reduziert sind. Eine weitere Erhöhung führt zu einer unzureichenden Prozessstabilität und damit zu einer unzureichenden Verarbeitungseignung für das FFF-Verfahren. Weiterhin zeigt sich, dass der Einfluss der verwendeten plättchenförmigen Füllstoffe für eine identische Kunststoffmatrix vergleichbar ist. Durch die Verwendung von Verarbeitungshilfen können die mechanischen Eigenschaften allerdings beeinflusst werden. Die Erhöhung des E-Moduls und der Bruchdehnung ist dabei auf die verbesserte Benetzung der Füllstoffpartikel und damit eine verbesserte Kunststoff-Füllstoff-Interaktion zurückzuführen. Bewertung der Wärmeleitfähigkeit Zur Darstellung der Ergebnisse der Wärmeleitfähigkeit wurden die Messergebnisse von je vier Probekörpern über die Prüftemperaturen zwischen 30 °C und 180 °C in 30 °C Inkrementen gemittelt (Bild 4). Die Ergebnisse zeigen eine positive Korrelation zwischen einem zunehmenden Füllstoffvolumenanteil und der Wärmeleitfähigkeit. Diese Steigerung ist wiederum abhängig von der jeweilig verwendeten Füllstoffart. Hierbei liefert das Material PBTx-F2-X eine vergleichbare Wärmeleitfähigkeit wie die Materialien PBTx-F1 und PBTxa-F1 in der jeweiligen Y-Orientierung. Die Unterschiede zwischen den beiden Materialien PBTx-F1 und PBTxa-F1 sind hingegen minimal und der Einfluss der Verarbeitungshilfe auf die Wärmeleitfähigkeit dementsprechend als vernachlässigbar anzusehen. Weiterhin ist eine anisotrope Wärmeleitfähigkeit für die mit Plättchen gefüllten Kunststoffe ersichtlich. Während die X-Orientierung (entlang der abgelegten Stränge) eine erhöhte Wärmeleitfähigkeit für alle Materialien liefert, ist diese für die Z-Orientierung (zwischen den Schichten) am geringsten. Gründe hierfür sind der Strangverbund sowie die Füllstofforientierung innerhalb der abgelegten Stränge. Dabei ist die aufgezeigte Anisotropie für den Füllstoff F2 im Vergleich zu F1 leicht reduziert und bestätigt den spezifischen Einfluss der Füllstoffart. Auf Basis der Ergebnisse können allgemein drei charakteristische Orientierungen zur Bewertung der Wärmeleitfähigkeit erfasst werden. Für die Bauteilauslegung ist der aufgezeigte Einfluss plättchenförmiger Füllstoffe auf die sich einstellende Anisotropie von im FFF-Verfahren gefertigten Strukturen zwingend zu beachten. Ausblick Die angeführten Untersuchungen zeigen, dass die Verwendung von plättchenförmigen Füllstoffen in Abhängigkeit von dem Füllstoffvolumenanteil zu einer Beeinflussung der Materialeigenschaften führt. Die dargelegten Ergebnisse stellen in diesem Kontext eine Grundlage zur Bewertung des Zusammenhangs zwischen den mechanischen Eigenschaften und der Wärmeleitfähigkeit dar. Insbesondere die Limitierung des Füllstoffvolumenanteils durch die erhöhte Versprödung ist hierbei anzuführen. Aktuelle Untersuchungen an der Kunststofftechnik Paderborn befassen sich mit der Betrachtung weiterer material- und prozessseitiger Einflussgrößen auf die Wärmeleitfähigkeit. Die generierten Daten sollen schließlich für die Entwicklung eines Modells zur Vorhersage der Wärmeleitfähigkeit von im FFF-Verfahren gefertigten Strukturen zusammengeführt werden."}],"citation":{"mla":"Moritzer, Elmar, et al. “Wie Der Füllstoffvolumenanteil Die Materialeigenschaften Beeinflusst.” Plastverarbeiter, vol. 2024, 2024.","ama":"Moritzer E, Elsner CL, Salm MKF. Wie der Füllstoffvolumenanteil die Materialeigenschaften beeinflusst. Plastverarbeiter. 2024;2024.","bibtex":"@article{Moritzer_Elsner_Salm_2024, title={Wie der Füllstoffvolumenanteil die Materialeigenschaften beeinflusst}, volume={2024}, journal={Plastverarbeiter}, author={Moritzer, Elmar and Elsner, Christian Lennart and Salm, Maximilian Karl Franz}, year={2024} }","apa":"Moritzer, E., Elsner, C. L., & Salm, M. K. F. (2024). Wie der Füllstoffvolumenanteil die Materialeigenschaften beeinflusst. Plastverarbeiter, 2024.","ieee":"E. Moritzer, C. L. Elsner, and M. K. F. Salm, “Wie der Füllstoffvolumenanteil die Materialeigenschaften beeinflusst,” Plastverarbeiter, vol. 2024, 2024.","short":"E. Moritzer, C.L. Elsner, M.K.F. Salm, Plastverarbeiter 2024 (2024).","chicago":"Moritzer, Elmar, Christian Lennart Elsner, and Maximilian Karl Franz Salm. “Wie Der Füllstoffvolumenanteil Die Materialeigenschaften Beeinflusst.” Plastverarbeiter 2024 (2024)."},"publication":"Plastverarbeiter","volume":2024,"user_id":"59363","language":[{"iso":"eng"}],"_id":"59131","intvolume":" 2024","date_updated":"2025-03-27T10:56:02Z","author":[{"id":"20531","full_name":"Moritzer, Elmar","first_name":"Elmar","last_name":"Moritzer"},{"id":"70729","last_name":"Elsner","first_name":"Christian Lennart","full_name":"Elsner, Christian Lennart"},{"last_name":"Salm","first_name":"Maximilian Karl Franz","full_name":"Salm, Maximilian Karl Franz","id":"57929"}],"status":"public","year":"2024","title":"Wie der Füllstoffvolumenanteil die Materialeigenschaften beeinflusst"},{"abstract":[{"text":"Compounding is an important step in processing base polymers and is used to incorporate various additives into a polymer. For this purpose, different screw elements are used for dispersive and distributive mixing on a co-rotating twin-screw extruder. Optimising the screw configuration requires precise knowledge of the screw elements’ mixing properties, which have not been thoroughly investigated. This study analyses the mixing behaviour of individual screw elements regarding dispersive and distributive mixing using 3D CFD flow simulations with subsequent particle tracking. For distributive mixing, the particle distribution behind the screw elements in the XY plane is analysed and the mixing index MQ, which relates the standard deviation and the mean value of the triangular areas between the particles, is calculated. For dispersive mixing, the maximum shear stress on the particle path and the integral of the shear stress over the residence time of each individual particle are determined. The results show that screw element geometry and rotation speed have a significant influence on dispersive and distributive mixing. In addition, better dispersive mixing is achievable with highly viscous materials. These findings enable the optimisation of the mixing zone of a co-rotating twin-screw extruder for the efficient mixing of mineral fillers.","lang":"eng"}],"quality_controlled":"1","citation":{"ama":"Oldemeier JP, Schöppner V. Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking. Polymers. 2024;16(21). doi:10.3390/polym16212952","bibtex":"@article{Oldemeier_Schöppner_2024, title={Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking}, volume={16}, DOI={10.3390/polym16212952}, number={21}, journal={Polymers}, author={Oldemeier, Jan Philipp and Schöppner, Volker}, year={2024} }","mla":"Oldemeier, Jan Philipp, and Volker Schöppner. “Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking.” Polymers, vol. 16, no. 21, 2024, doi:10.3390/polym16212952.","chicago":"Oldemeier, Jan Philipp, and Volker Schöppner. “Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking.” Polymers 16, no. 21 (2024). https://doi.org/10.3390/polym16212952.","short":"J.P. Oldemeier, V. Schöppner, Polymers 16 (2024).","apa":"Oldemeier, J. P., & Schöppner, V. (2024). Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking. Polymers, 16(21). https://doi.org/10.3390/polym16212952","ieee":"J. P. Oldemeier and V. Schöppner, “Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking,” Polymers, vol. 16, no. 21, 2024, doi: 10.3390/polym16212952."},"publication":"Polymers","issue":"21","department":[{"_id":"9"},{"_id":"321"},{"_id":"367"}],"type":"journal_article","keyword":["Compoundieren","disperses Mischen","distributives Mischen","Schneckenelemente"],"date_created":"2025-03-25T10:19:50Z","intvolume":" 16","date_updated":"2025-03-27T12:56:35Z","author":[{"id":"56781","full_name":"Oldemeier, Jan Philipp","first_name":"Jan Philipp","last_name":"Oldemeier"},{"first_name":"Volker","last_name":"Schöppner","full_name":"Schöppner, Volker","id":"20530"}],"status":"public","year":"2024","title":"Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking","volume":16,"doi":"10.3390/polym16212952","user_id":"59363","_id":"59135","language":[{"iso":"eng"}]},{"publication_status":"published","date_updated":"2025-04-02T15:59:55Z","article_type":"original","intvolume":" 136","year":"2024","title":"Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy","author":[{"full_name":"Kirbus, Benjamin","first_name":"Benjamin","last_name":"Kirbus"},{"first_name":"Samuel D.","last_name":"Seddon","full_name":"Seddon, Samuel D."},{"last_name":"Kiseleva","first_name":"Iuliia","full_name":"Kiseleva, Iuliia"},{"last_name":"Beyreuther","first_name":"Elke","full_name":"Beyreuther, Elke"},{"id":"22501","last_name":"Rüsing","first_name":"Michael","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."}],"publication_identifier":{"issn":["0021-8979","1089-7550"]},"doi":"10.1063/5.0237769","article_number":"154102","main_file_link":[{"url":" https://doi.org/10.1063/5.0237769","open_access":"1"}],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Ferroelectric materials play a crucial role in a broad range of technologies due to their unique properties that are deeply connected to the pattern and behavior of their ferroelectric (FE) domains. Chief among them, barium titanate (BaTiO3; BTO) sees widespread applications such as in electronics but equally is a ferroelectric model system for fundamental research, e.g., to study the interplay of such FE domains, the domain walls (DWs), and their macroscopic properties, owed to BTO’s multiple and experimentally accessible phase transitions. Here, we employ Second Harmonic Generation Microscopy (SHGM) to in situ investigate the cubic-to-tetragonal (at ∼126°C) and the tetragonal-to-orthorhombic (at ∼5°C) phase transition in single-crystalline BTO via three-dimensional (3D) DW mapping. We demonstrate that SHGM imaging provides the direct visualization of FE domain switching as well as the domain dynamics in 3D, shedding light on the interplay of the domain structure and phase transition. These results allow us to extract the different transition temperatures locally, to unveil the hysteresis behavior, and to determine the type of phase transition at play (first/second order) from the recorded SHGM data. The capabilities of SHGM in uncovering these crucial phenomena can easily be applied to other ferroelectrics to provide new possibilities for in situ engineering of advanced ferroic devices."}],"issue":"15","publication":"Journal of Applied Physics","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2025-04-02T15:57:11Z","status":"public","user_id":"22501","volume":136,"publisher":"AIP Publishing","_id":"59269","quality_controlled":"1","citation":{"mla":"Kirbus, Benjamin, et al. “Probing Ferroelectric Phase Transitions in Barium Titanate Single Crystals via In-Situ Second Harmonic Generation Microscopy.” Journal of Applied Physics, vol. 136, no. 15, 154102, AIP Publishing, 2024, doi:10.1063/5.0237769.","ama":"Kirbus B, Seddon SD, Kiseleva I, Beyreuther E, Rüsing M, Eng LM. Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy. Journal of Applied Physics. 2024;136(15). doi:10.1063/5.0237769","bibtex":"@article{Kirbus_Seddon_Kiseleva_Beyreuther_Rüsing_Eng_2024, title={Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy}, volume={136}, DOI={10.1063/5.0237769}, number={15154102}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Kirbus, Benjamin and Seddon, Samuel D. and Kiseleva, Iuliia and Beyreuther, Elke and Rüsing, Michael and Eng, Lukas M.}, year={2024} }","apa":"Kirbus, B., Seddon, S. D., Kiseleva, I., Beyreuther, E., Rüsing, M., & Eng, L. M. (2024). Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy. Journal of Applied Physics, 136(15), Article 154102. https://doi.org/10.1063/5.0237769","ieee":"B. Kirbus, S. D. Seddon, I. Kiseleva, E. Beyreuther, M. Rüsing, and L. M. Eng, “Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy,” Journal of Applied Physics, vol. 136, no. 15, Art. no. 154102, 2024, doi: 10.1063/5.0237769.","short":"B. Kirbus, S.D. Seddon, I. Kiseleva, E. Beyreuther, M. Rüsing, L.M. Eng, Journal of Applied Physics 136 (2024).","chicago":"Kirbus, Benjamin, Samuel D. Seddon, Iuliia Kiseleva, Elke Beyreuther, Michael Rüsing, and Lukas M. Eng. “Probing Ferroelectric Phase Transitions in Barium Titanate Single Crystals via In-Situ Second Harmonic Generation Microscopy.” Journal of Applied Physics 136, no. 15 (2024). https://doi.org/10.1063/5.0237769."},"oa":"1"}]