--- _id: '44672' abstract: - lang: eng text: With enhancing digitalization, condition monitoring is used in an increasing number of application fields across various industrial sectors. By its application, increased reliability as well as reduced risks and costs can be achieved. Based on different approaches, technical systems are monitored and measured data is analyzed to enable condition-based or predictive maintenance. To this end, machine learning approaches are usually implemented to diagnose the health states or predict the health index of the monitored system. However, these trained models are often black-box models, not intuitively explainable for a human. To overcome this shortcoming, a model-based approach based on physics is developed for piezoelectric bending actuators. Such a model enables a transparent representation of the system. Moreover, the model-based approach is extended by a parameter-estimation to account for sudden changes in behavior e. g. caused by occurring cracks. article_number: '114399' article_type: original author: - first_name: Amelie full_name: Bender, Amelie id: '54290' last_name: Bender citation: ama: 'Bender A. Model-based condition monitoring of piezoelectric bending actuators. Sensors and Actuators A: Physical. 2023;357. doi:10.1016/j.sna.2023.114399' apa: 'Bender, A. (2023). Model-based condition monitoring of piezoelectric bending actuators. Sensors and Actuators A: Physical, 357, Article 114399. https://doi.org/10.1016/j.sna.2023.114399' bibtex: '@article{Bender_2023, title={Model-based condition monitoring of piezoelectric bending actuators}, volume={357}, DOI={10.1016/j.sna.2023.114399}, number={114399}, journal={Sensors and Actuators A: Physical}, publisher={Elsevier BV}, author={Bender, Amelie}, year={2023} }' chicago: 'Bender, Amelie. “Model-Based Condition Monitoring of Piezoelectric Bending Actuators.” Sensors and Actuators A: Physical 357 (2023). https://doi.org/10.1016/j.sna.2023.114399.' ieee: 'A. Bender, “Model-based condition monitoring of piezoelectric bending actuators,” Sensors and Actuators A: Physical, vol. 357, Art. no. 114399, 2023, doi: 10.1016/j.sna.2023.114399.' mla: 'Bender, Amelie. “Model-Based Condition Monitoring of Piezoelectric Bending Actuators.” Sensors and Actuators A: Physical, vol. 357, 114399, Elsevier BV, 2023, doi:10.1016/j.sna.2023.114399.' short: 'A. Bender, Sensors and Actuators A: Physical 357 (2023).' date_created: 2023-05-09T09:49:44Z date_updated: 2023-05-09T09:53:31Z department: - _id: '151' doi: 10.1016/j.sna.2023.114399 intvolume: ' 357' keyword: - Condition Monitoring - Model-based approach Diagnostics - Varying conditions - Explainability - Piezoelectric bending actuators language: - iso: eng main_file_link: - open_access: '1' url: https://authors.elsevier.com/a/1h2WV3IC9dF7Hm oa: '1' publication: 'Sensors and Actuators A: Physical' publication_identifier: issn: - 0924-4247 publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: Model-based condition monitoring of piezoelectric bending actuators type: journal_article user_id: '54290' volume: 357 year: '2023' ... --- _id: '9784' abstract: - lang: eng text: Piezoelectric inertia motors use the inertia of a body to drive it by means of a friction contact in a series of small steps. These motors can operate in ``stick-slip'' or ``slip-slip'' mode, with the fundamental frequency of the driving signal ranging from several Hertz to more than 100 kHz. To predict the motor characteristics, a Coulomb friction model is sufficient in many cases, but numerical simulation requires microscopic time steps. This contribution proposes a much faster simulation technique using one evaluation per period of the excitation signal. The proposed technique produces results very close to those of timestep simulation for ultrasonics inertia motors and allows direct determination of the steady-state velocity of an inertia motor from the motion profile of the driving part. Thus it is a useful simulation technique which can be applied in both analysis and design of inertia motors, especially for parameter studies and optimisation. author: - first_name: Matthias full_name: Hunstig, Matthias last_name: Hunstig - first_name: Tobias full_name: Hemsel, Tobias last_name: Hemsel - first_name: Walter full_name: Sextro, Walter last_name: Sextro citation: ama: 'Hunstig M, Hemsel T, Sextro W. An efficient simulation technique for high-frequency piezoelectric inertia motors. In: Ultrasonics Symposium (IUS), 2012 IEEE International. ; 2012:277-280. doi:10.1109/ULTSYM.2012.0068' apa: Hunstig, M., Hemsel, T., & Sextro, W. (2012). An efficient simulation technique for high-frequency piezoelectric inertia motors. In Ultrasonics Symposium (IUS), 2012 IEEE International (pp. 277–280). https://doi.org/10.1109/ULTSYM.2012.0068 bibtex: '@inproceedings{Hunstig_Hemsel_Sextro_2012, title={An efficient simulation technique for high-frequency piezoelectric inertia motors}, DOI={10.1109/ULTSYM.2012.0068}, booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2012}, pages={277–280} }' chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “An Efficient Simulation Technique for High-Frequency Piezoelectric Inertia Motors.” In Ultrasonics Symposium (IUS), 2012 IEEE International, 277–80, 2012. https://doi.org/10.1109/ULTSYM.2012.0068. ieee: M. Hunstig, T. Hemsel, and W. Sextro, “An efficient simulation technique for high-frequency piezoelectric inertia motors,” in Ultrasonics Symposium (IUS), 2012 IEEE International, 2012, pp. 277–280. mla: Hunstig, Matthias, et al. “An Efficient Simulation Technique for High-Frequency Piezoelectric Inertia Motors.” Ultrasonics Symposium (IUS), 2012 IEEE International, 2012, pp. 277–80, doi:10.1109/ULTSYM.2012.0068. short: 'M. Hunstig, T. Hemsel, W. Sextro, in: Ultrasonics Symposium (IUS), 2012 IEEE International, 2012, pp. 277–280.' date_created: 2019-05-13T13:20:17Z date_updated: 2022-01-06T07:04:20Z department: - _id: '151' doi: 10.1109/ULTSYM.2012.0068 keyword: - friction - ultrasonic motors - Coulomb friction model - efficient simulation technique - friction contact - high-frequency piezoelectric inertia motor - motor characteristics prediction - numerical simulation - slip-slip mode - stick-slip mode - time-step simulation - ultrasonic inertia motor - Acceleration - Acoustics - Actuators - Computational modeling - Friction - Numerical models - Steady-state language: - iso: eng page: 277-280 publication: Ultrasonics Symposium (IUS), 2012 IEEE International publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: An efficient simulation technique for high-frequency piezoelectric inertia motors type: conference user_id: '55222' year: '2012' ... --- _id: '9767' abstract: - lang: eng text: The paper presents the results of numerical and experimental investigation of cylindrical piezoelectric actuator used for achieving independent three degrees of freedom oscillations of the contact point. The design of actuator based on a hollow piezoelectric cylinder mounted on a metal rod. The piezoceramic cylinder has a radial polarization and special configuration of the electrodes that cover inner and outer surface of the cylinder. The main advantage of actuator's design is that solid metallic rod operates as a part of inner electrode of the cylinder and a stator of actuator. The geometry of piezoelectric actuator was adopted to reach resonance of oscillations for the first longitudinal mode and the third flexural mode at same frequency. The actuator is designed to move positioned object through contact point which is located on the top of the rod. The optimal topology of electrodes was found to achieve longitudinal and flexural oscillations of the actuator in two perpendicular planes. Three degrees of freedom of the positioning object can be achieved and control of the system can be implemented by applying different excitation schemes and regimes. The numerical simulation and experimental study of piezoelectric actuator was performed. Impedance of actuator was analyzed under different excitation regimes. The results of numerical modeling and experimental study were compared. Recommendations for the further development of this type of actuator are given. author: - first_name: Raimundas full_name: Lucinskis, Raimundas last_name: Lucinskis - first_name: Dalius full_name: Mazeika, Dalius last_name: Mazeika - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Ramutis full_name: Bansevicius, Ramutis last_name: Bansevicius citation: ama: Lucinskis R, Mazeika D, Hemsel T, Bansevicius R. Multi-DOF cylindrical piezoelectric actuator with radial polarization. AIP Conference Proceedings. 2011;1433(1):693-696. doi:10.1063/1.3703277 apa: Lucinskis, R., Mazeika, D., Hemsel, T., & Bansevicius, R. (2011). Multi-DOF cylindrical piezoelectric actuator with radial polarization. AIP Conference Proceedings, 1433(1), 693–696. https://doi.org/10.1063/1.3703277 bibtex: '@article{Lucinskis_Mazeika_Hemsel_Bansevicius_2011, title={Multi-DOF cylindrical piezoelectric actuator with radial polarization}, volume={1433}, DOI={10.1063/1.3703277}, number={1}, journal={AIP Conference Proceedings}, publisher={AIP}, author={Lucinskis, Raimundas and Mazeika, Dalius and Hemsel, Tobias and Bansevicius, Ramutis}, year={2011}, pages={693–696} }' chicago: 'Lucinskis, Raimundas, Dalius Mazeika, Tobias Hemsel, and Ramutis Bansevicius. “Multi-DOF Cylindrical Piezoelectric Actuator with Radial Polarization.” AIP Conference Proceedings 1433, no. 1 (2011): 693–96. https://doi.org/10.1063/1.3703277.' ieee: R. Lucinskis, D. Mazeika, T. Hemsel, and R. Bansevicius, “Multi-DOF cylindrical piezoelectric actuator with radial polarization,” AIP Conference Proceedings, vol. 1433, no. 1, pp. 693–696, 2011. mla: Lucinskis, Raimundas, et al. “Multi-DOF Cylindrical Piezoelectric Actuator with Radial Polarization.” AIP Conference Proceedings, vol. 1433, no. 1, AIP, 2011, pp. 693–96, doi:10.1063/1.3703277. short: R. Lucinskis, D. Mazeika, T. Hemsel, R. Bansevicius, AIP Conference Proceedings 1433 (2011) 693–696. date_created: 2019-05-13T10:56:30Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.1063/1.3703277 intvolume: ' 1433' issue: '1' keyword: - dielectric polarisation - piezoceramics - piezoelectric actuators language: - iso: eng page: 693-696 publication: AIP Conference Proceedings publisher: AIP quality_controlled: '1' status: public title: Multi-DOF cylindrical piezoelectric actuator with radial polarization type: journal_article user_id: '55222' volume: 1433 year: '2011' ... --- _id: '9570' abstract: - lang: eng text: "EN: Although the use of new actuator technologies is quite enthusiastic, the realization of innovative systems based on these principles fails because of doubts in dependability. Until now, new working principles for actuators have not been systematically investigated in the means of dependability. Therefore we developed a proceeding for a dependability-oriented evaluation of technologies. This is shown in the case of shape memory alloy actuators. \r\nDE: Die Realisierung von Systemen mittels innovativer Aktortechnologien scheitert oftmals an der Skepsis gegenüber der Verlässlichkeit (Vertrauen in die zuverlässige und sichere Funktionalität der Technologie). Diese liegt darin begründet, dass neue Aktortechnologien bzw. die Integration von innovativen physikalischen Wirkprinzipen innerhalb neuer Aktorkonzepte bisher noch nicht systematisch im Kontext der Verlässlichkeit untersucht werden. Daher haben wir ein Vorgehen zur verlässlichkeitsorientierten Technologiebewertung entwickelt. Neben der detaillierten Darstellung des Vorgehensmodells wird es exemplarisch anhand von Formgedächtnislegierungen zur Entwicklung innovativer Antriebslösungen angewendet." author: - first_name: Thomas full_name: Müller, Thomas last_name: Müller - first_name: Florian full_name: Schiedeck, Florian last_name: Schiedeck - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: 'Müller T, Schiedeck F, Hemsel T. Verlässlichkeitorientierte Technologiebewertung innovativer Aktortechnologien am Beispiel von Formgedächtnislegierungen. In: 2. Tagung Des DVM -- Arbeitskreis Zuverlässigkeit Mechatronischer Und Adaptronischer Systeme: Absicherung Der Systemzuverlässigkeit, Koblenz. ; 2008.' apa: 'Müller, T., Schiedeck, F., & Hemsel, T. (2008). Verlässlichkeitorientierte Technologiebewertung innovativer Aktortechnologien am Beispiel von Formgedächtnislegierungen. In 2. Tagung des DVM -- Arbeitskreis Zuverlässigkeit mechatronischer und adaptronischer Systeme: Absicherung der Systemzuverlässigkeit, Koblenz.' bibtex: '@inproceedings{Müller_Schiedeck_Hemsel_2008, title={Verlässlichkeitorientierte Technologiebewertung innovativer Aktortechnologien am Beispiel von Formgedächtnislegierungen}, booktitle={2. Tagung des DVM -- Arbeitskreis Zuverlässigkeit mechatronischer und adaptronischer Systeme: Absicherung der Systemzuverlässigkeit, Koblenz}, author={Müller, Thomas and Schiedeck, Florian and Hemsel, Tobias}, year={2008} }' chicago: 'Müller, Thomas, Florian Schiedeck, and Tobias Hemsel. “Verlässlichkeitorientierte Technologiebewertung Innovativer Aktortechnologien Am Beispiel von Formgedächtnislegierungen.” In 2. Tagung Des DVM -- Arbeitskreis Zuverlässigkeit Mechatronischer Und Adaptronischer Systeme: Absicherung Der Systemzuverlässigkeit, Koblenz, 2008.' ieee: 'T. Müller, F. Schiedeck, and T. Hemsel, “Verlässlichkeitorientierte Technologiebewertung innovativer Aktortechnologien am Beispiel von Formgedächtnislegierungen,” in 2. Tagung des DVM -- Arbeitskreis Zuverlässigkeit mechatronischer und adaptronischer Systeme: Absicherung der Systemzuverlässigkeit, Koblenz, 2008.' mla: 'Müller, Thomas, et al. “Verlässlichkeitorientierte Technologiebewertung Innovativer Aktortechnologien Am Beispiel von Formgedächtnislegierungen.” 2. Tagung Des DVM -- Arbeitskreis Zuverlässigkeit Mechatronischer Und Adaptronischer Systeme: Absicherung Der Systemzuverlässigkeit, Koblenz, 2008.' short: 'T. Müller, F. Schiedeck, T. Hemsel, in: 2. Tagung Des DVM -- Arbeitskreis Zuverlässigkeit Mechatronischer Und Adaptronischer Systeme: Absicherung Der Systemzuverlässigkeit, Koblenz, 2008.' date_created: 2019-04-29T11:57:41Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' keyword: - 'EN: Dependability' - Reliability - Evaluation of Technology - Actuators - 'Shape Memory Alloys DE: Verl{\' language: - iso: eng publication: '2. Tagung des DVM -- Arbeitskreis Zuverlässigkeit mechatronischer und adaptronischer Systeme: Absicherung der Systemzuverlässigkeit, Koblenz' status: public title: Verlässlichkeitorientierte Technologiebewertung innovativer Aktortechnologien am Beispiel von Formgedächtnislegierungen type: conference user_id: '55222' year: '2008' ... --- _id: '9576' abstract: - lang: eng text: 'In neurosurgery, delineation of tumor boundaries during resection of brain tumors is of substantial relevance. During operation distinction between tumor and healthy tissue rely on the abilities of the surgeon based on visual and tactile differentiation. In this paper a high sensitivity actuator-sensor system using a piezoelectric bimorph is presented. Frequency shift and transfer function of the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity is evaluated using two frequency controls strategies: A phase-locked loop (PLL) and a self-oscillating circuit. Results of measurements conducted on gel-phantoms are presented and discussed.' author: - first_name: David Oliva full_name: Uribe, David Oliva last_name: Uribe - first_name: Ralf full_name: Stroop, Ralf last_name: Stroop - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek citation: ama: 'Uribe DO, Stroop R, Hemsel T, Wallaschek J. Development of a biomedical tissue differentiation system using piezoelectric actuators. In: Frequency Control Symposium, 2008 IEEE International. ; 2008:91-94. doi:10.1109/FREQ.2008.4622963' apa: Uribe, D. O., Stroop, R., Hemsel, T., & Wallaschek, J. (2008). Development of a biomedical tissue differentiation system using piezoelectric actuators. In Frequency Control Symposium, 2008 IEEE International (pp. 91–94). https://doi.org/10.1109/FREQ.2008.4622963 bibtex: '@inproceedings{Uribe_Stroop_Hemsel_Wallaschek_2008, title={Development of a biomedical tissue differentiation system using piezoelectric actuators}, DOI={10.1109/FREQ.2008.4622963}, booktitle={Frequency Control Symposium, 2008 IEEE International}, author={Uribe, David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}, year={2008}, pages={91–94} }' chicago: Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.” In Frequency Control Symposium, 2008 IEEE International, 91–94, 2008. https://doi.org/10.1109/FREQ.2008.4622963. ieee: D. O. Uribe, R. Stroop, T. Hemsel, and J. Wallaschek, “Development of a biomedical tissue differentiation system using piezoelectric actuators,” in Frequency Control Symposium, 2008 IEEE International, 2008, pp. 91–94. mla: Uribe, David Oliva, et al. “Development of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.” Frequency Control Symposium, 2008 IEEE International, 2008, pp. 91–94, doi:10.1109/FREQ.2008.4622963. short: 'D.O. Uribe, R. Stroop, T. Hemsel, J. Wallaschek, in: Frequency Control Symposium, 2008 IEEE International, 2008, pp. 91–94.' date_created: 2019-04-29T13:07:39Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' doi: 10.1109/FREQ.2008.4622963 keyword: - biomedical measurement - brain - cancer - neurophysiology - phantoms - phase locked loops - piezoelectric actuators - surgery - tactile sensors - transfer functions - tumours - PLL - biomedical tissue differentiation system - brain tumor resection - frequency control - frequency shift - gel-phantom - high sensitivity actuator-sensor system - neurosurgery - phase-locked loop - piezoelectric actuators - piezoelectric bimorph - self-oscillating circuit - sensor sensitivity - tactile differentiation - tactile sensor system - transfer function - tumor boundary - visual differentiation - Biomedical measurements - Circuits - Frequency control - Neoplasms - Neurosurgery - Phase locked loops - Piezoelectric actuators - Surges - Transfer functions - Voltage language: - iso: eng page: 91-94 publication: Frequency Control Symposium, 2008 IEEE International publication_identifier: issn: - 1075-6787 quality_controlled: '1' status: public title: Development of a biomedical tissue differentiation system using piezoelectric actuators type: conference user_id: '55222' year: '2008' ...