--- _id: '9991' abstract: - lang: eng text: Abstract:Since fine powders tend strongly to adhesion and agglomeration, their processing withconventional methods is difficult or impossible. Typically, in order to enable the handling of finepowders, chemicals are added to increase the flowability and reduce adhesion. This contributionshows that instead of additives also vibrations can be used to increase the flowability, to reduceadhesion and cohesion, and thus to enable or improve processes such as precision dosing, mixing,and transport of very fine powders. The methods for manipulating powder properties are describedin detail and prototypes for experimental studies are presented. It is shown that the handling of finepowders can be improved by using low-frequency, high-frequency or a combination of low- andhigh-frequency vibration. author: - first_name: Paul full_name: Dunst, Paul id: '22130' last_name: Dunst - first_name: Peter full_name: Bornmann, Peter last_name: Bornmann - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: Dunst P, Bornmann P, Hemsel T, Sextro W. Vibration-Assisted Handling of Dry Fine Powders. Actuators 2018, 7(2). 2018:1-11. doi:10.3390/act7020018 apa: Dunst, P., Bornmann, P., Hemsel, T., & Sextro, W. (2018). Vibration-Assisted Handling of Dry Fine Powders. Actuators 2018, 7(2)., 1–11. https://doi.org/10.3390/act7020018 bibtex: '@article{Dunst_Bornmann_Hemsel_Sextro_2018, title={Vibration-Assisted Handling of Dry Fine Powders}, DOI={10.3390/act7020018}, journal={Actuators 2018, 7(2).}, author={Dunst, Paul and Bornmann, Peter and Hemsel, Tobias and Sextro, Walter}, year={2018}, pages={1–11} }' chicago: Dunst, Paul, Peter Bornmann, Tobias Hemsel, and Walter Sextro. “Vibration-Assisted Handling of Dry Fine Powders.” Actuators 2018, 7(2)., 2018, 1–11. https://doi.org/10.3390/act7020018. ieee: P. Dunst, P. Bornmann, T. Hemsel, and W. Sextro, “Vibration-Assisted Handling of Dry Fine Powders,” Actuators 2018, 7(2)., pp. 1–11, 2018. mla: Dunst, Paul, et al. “Vibration-Assisted Handling of Dry Fine Powders.” Actuators 2018, 7(2)., 2018, pp. 1–11, doi:10.3390/act7020018. short: P. Dunst, P. Bornmann, T. Hemsel, W. Sextro, Actuators 2018, 7(2). (2018) 1–11. date_created: 2019-05-27T10:16:16Z date_updated: 2019-09-16T09:44:54Z department: - _id: '151' doi: 10.3390/act7020018 keyword: - powder handling - flowability - dosing - transport - mixing - dispersion - piezoelectricactuators - vibrations language: - iso: eng page: 1-11 publication: Actuators 2018, 7(2). quality_controlled: '1' status: public title: Vibration-Assisted Handling of Dry Fine Powders type: journal_article user_id: '55222' year: '2018' ... --- _id: '9889' abstract: - lang: eng text: A measurement method is presented that combines the advantages of the multisine measurement technique with a prediction method for peak bending behavior. This combination allows the analysis of the dynamic behavior of mechanical structures at distinctly reduced measurement durations and has the advantage of reducing high excitation impacts on the structure under test. author: - first_name: Christian full_name: Sprock, Christian last_name: Sprock - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Sprock C, Sextro W. Time-efficient dynamic analysis of structures exhibiting nonlinear peak bending. In: Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International. ; 2014:320-324. doi:10.1109/I2MTC.2014.6860760' apa: Sprock, C., & Sextro, W. (2014). Time-efficient dynamic analysis of structures exhibiting nonlinear peak bending. In Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International (pp. 320–324). https://doi.org/10.1109/I2MTC.2014.6860760 bibtex: '@inproceedings{Sprock_Sextro_2014, title={Time-efficient dynamic analysis of structures exhibiting nonlinear peak bending}, DOI={10.1109/I2MTC.2014.6860760}, booktitle={Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International}, author={Sprock, Christian and Sextro, Walter}, year={2014}, pages={320–324} }' chicago: Sprock, Christian, and Walter Sextro. “Time-Efficient Dynamic Analysis of Structures Exhibiting Nonlinear Peak Bending.” In Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International, 320–24, 2014. https://doi.org/10.1109/I2MTC.2014.6860760. ieee: C. Sprock and W. Sextro, “Time-efficient dynamic analysis of structures exhibiting nonlinear peak bending,” in Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International, 2014, pp. 320–324. mla: Sprock, Christian, and Walter Sextro. “Time-Efficient Dynamic Analysis of Structures Exhibiting Nonlinear Peak Bending.” Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International, 2014, pp. 320–24, doi:10.1109/I2MTC.2014.6860760. short: 'C. Sprock, W. Sextro, in: Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International, 2014, pp. 320–324.' date_created: 2019-05-20T13:25:22Z date_updated: 2019-05-20T13:25:53Z department: - _id: '151' doi: 10.1109/I2MTC.2014.6860760 keyword: - bending - dynamic testing - measurement - structural engineering - vibrations - measurement durations - mechanical structures - multisine measurement technique - nonlinear peak bending behavior - prediction method - time-efficient dynamic analysis - Heuristic algorithms - Nonlinear systems - Oscillators - Time measurement - Time-frequency analysis - Vibrations language: - iso: eng page: 320-324 publication: Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International status: public title: Time-efficient dynamic analysis of structures exhibiting nonlinear peak bending type: conference user_id: '55222' year: '2014' ... --- _id: '9519' abstract: - lang: eng text: 'Several positioning tasks demand translatory drive instead of rotary motion. To achieve drives that are capable e.g. to drive the sunroof of a car or to lift a car''s window, multiple miniaturized motors can be combined. But in this case many other questions arise: the electromechanical behavior of the individual motors differs slightly, the motor characteristics are strongly dependent on the driving parameters and the driven load, many applications need some extra power for special cases like overcoming higher forces periodically. Thus, the bundle of motors has to act well organized and controlled to get an optimized drive that is not oversized and costly.' author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Maik full_name: Mracek, Maik last_name: Mracek - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek - first_name: Piotr full_name: Vasiljev, Piotr last_name: Vasiljev citation: ama: 'Hemsel T, Mracek M, Wallaschek J, Vasiljev P. A novel approach for high power ultrasonic linear motors. In: Ultrasonics Symposium, 2004 IEEE. Vol 2. ; 2004:1161-1164. doi:10.1109/ULTSYM.2004.1417988' apa: Hemsel, T., Mracek, M., Wallaschek, J., & Vasiljev, P. (2004). A novel approach for high power ultrasonic linear motors. In Ultrasonics Symposium, 2004 IEEE (Vol. 2, pp. 1161–1164). https://doi.org/10.1109/ULTSYM.2004.1417988 bibtex: '@inproceedings{Hemsel_Mracek_Wallaschek_Vasiljev_2004, title={A novel approach for high power ultrasonic linear motors}, volume={2}, DOI={10.1109/ULTSYM.2004.1417988}, number={Vol.2}, booktitle={Ultrasonics Symposium, 2004 IEEE}, author={Hemsel, Tobias and Mracek, Maik and Wallaschek, Jörg and Vasiljev, Piotr}, year={2004}, pages={1161–1164} }' chicago: Hemsel, Tobias, Maik Mracek, Jörg Wallaschek, and Piotr Vasiljev. “A Novel Approach for High Power Ultrasonic Linear Motors.” In Ultrasonics Symposium, 2004 IEEE, 2:1161–64, 2004. https://doi.org/10.1109/ULTSYM.2004.1417988. ieee: T. Hemsel, M. Mracek, J. Wallaschek, and P. Vasiljev, “A novel approach for high power ultrasonic linear motors,” in Ultrasonics Symposium, 2004 IEEE, 2004, vol. 2, no. Vol.2, pp. 1161–1164. mla: Hemsel, Tobias, et al. “A Novel Approach for High Power Ultrasonic Linear Motors.” Ultrasonics Symposium, 2004 IEEE, vol. 2, no. Vol.2, 2004, pp. 1161–64, doi:10.1109/ULTSYM.2004.1417988. short: 'T. Hemsel, M. Mracek, J. Wallaschek, P. Vasiljev, in: Ultrasonics Symposium, 2004 IEEE, 2004, pp. 1161–1164.' date_created: 2019-04-29T08:12:06Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' doi: 10.1109/ULTSYM.2004.1417988 intvolume: ' 2' issue: Vol.2 keyword: - drives - electromechanical effects - linear motors - ultrasonic motors - car sunroof - car window - electromechanical behavior - high power ultrasonic linear motors - multiple miniaturized motors - positioning tasks - translatory drive - Costs - Electromagnetic forces - Frequency - Laboratories - Manufacturing - Mechatronics - Micromotors - Ultrasonic imaging - Vibrations - Voltage language: - iso: eng page: 1161-1164 publication: Ultrasonics Symposium, 2004 IEEE publication_identifier: issn: - 1051-0117 quality_controlled: '1' status: public title: A novel approach for high power ultrasonic linear motors type: conference user_id: '55222' volume: 2 year: '2004' ... --- _id: '8926' abstract: - lang: eng text: Piezoelectric transformers are well known since the publication of some patent applications at the end of the 1950s. But until today their only business use lies in the field of backlighting systems for LCDs. Due to key features as light-weight, flatness, high step-up at low volume and high efficiency piezoelectric transformers should be usable in a much broader range of applications. This contribution returns to mind their operating principle, shows how to model and to develop such devices as well as give some aspects for development trends that will lead to further applications. author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Littmann, Walter last_name: Littmann - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek citation: ama: 'Hemsel T, Littmann W, Wallaschek J. Piezoelectric transformers - state of the art and development trends. In: Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE. Vol 1. ; 2002:645-648. doi:10.1109/ULTSYM.2002.1193485' apa: Hemsel, T., Littmann, W., & Wallaschek, J. (2002). Piezoelectric transformers - state of the art and development trends. In Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE (Vol. 1, pp. 645–648). https://doi.org/10.1109/ULTSYM.2002.1193485 bibtex: '@inproceedings{Hemsel_Littmann_Wallaschek_2002, title={Piezoelectric transformers - state of the art and development trends}, volume={1}, DOI={10.1109/ULTSYM.2002.1193485}, number={vol.1}, booktitle={Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE}, author={Hemsel, Tobias and Littmann, Walter and Wallaschek, Jörg}, year={2002}, pages={645–648} }' chicago: Hemsel, Tobias, Walter Littmann, and Jörg Wallaschek. “Piezoelectric Transformers - State of the Art and Development Trends.” In Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE, 1:645–48, 2002. https://doi.org/10.1109/ULTSYM.2002.1193485. ieee: T. Hemsel, W. Littmann, and J. Wallaschek, “Piezoelectric transformers - state of the art and development trends,” in Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE, 2002, vol. 1, no. vol.1, pp. 645–648. mla: Hemsel, Tobias, et al. “Piezoelectric Transformers - State of the Art and Development Trends.” Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE, vol. 1, no. vol.1, 2002, pp. 645–48, doi:10.1109/ULTSYM.2002.1193485. short: 'T. Hemsel, W. Littmann, J. Wallaschek, in: Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE, 2002, pp. 645–648.' date_created: 2019-04-15T10:18:15Z date_updated: 2022-01-06T07:04:05Z department: - _id: '151' doi: 10.1109/ULTSYM.2002.1193485 intvolume: ' 1' issue: vol.1 keyword: - piezoelectric devices - reviews - transformers - backlighting systems - flatness - high efficiency piezoelectric transformers - high step-up - light-weight - low volume - operating principle - piezoelectric transformers - Circuits - Costs - Electromagnetic devices - Electromagnetic fields - Mechanical energy - Piezoelectric materials - Power electronics - Switching frequency - Transformers - Vibrations language: - iso: eng page: 645-648 publication: Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE publication_identifier: issn: - 1051-0117 status: public title: Piezoelectric transformers - state of the art and development trends type: conference user_id: '55222' volume: 1 year: '2002' ... --- _id: '8915' abstract: - lang: eng text: Ultrasonic linear motors have now been investigated for several years. Their key features are high thrust forces related to their volume and good position-accuracy. This contribution consists of two main parts. In the first part we describe the state-of-the-art of linear piezoelectric motors. Characteristics like no-load velocity, maximum thrust force and other technical properties of commercially available devices will be reported as well as those of prototypes. In the second part we report an ongoing research and development project aiming at a linear piezoelectric motor, which is capable of surpassing some of the shortcomings of other piezoelectric motors author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek citation: ama: 'Hemsel T, Wallaschek J. State of the art and development trends of ultrasonic linear motors. In: Ultrasonics Symposium, 2000 IEEE. Vol 1. ; 2000:663-666 vol.1. doi:10.1109/ULTSYM.2000.922635' apa: Hemsel, T., & Wallaschek, J. (2000). State of the art and development trends of ultrasonic linear motors. In Ultrasonics Symposium, 2000 IEEE (Vol. 1, pp. 663–666 vol.1). https://doi.org/10.1109/ULTSYM.2000.922635 bibtex: '@inproceedings{Hemsel_Wallaschek_2000, title={State of the art and development trends of ultrasonic linear motors}, volume={1}, DOI={10.1109/ULTSYM.2000.922635}, booktitle={Ultrasonics Symposium, 2000 IEEE}, author={Hemsel, Tobias and Wallaschek, Jörg}, year={2000}, pages={663–666 vol.1} }' chicago: Hemsel, Tobias, and Jörg Wallaschek. “State of the Art and Development Trends of Ultrasonic Linear Motors.” In Ultrasonics Symposium, 2000 IEEE, 1:663–66 vol.1, 2000. https://doi.org/10.1109/ULTSYM.2000.922635. ieee: T. Hemsel and J. Wallaschek, “State of the art and development trends of ultrasonic linear motors,” in Ultrasonics Symposium, 2000 IEEE, 2000, vol. 1, pp. 663–666 vol.1. mla: Hemsel, Tobias, and Jörg Wallaschek. “State of the Art and Development Trends of Ultrasonic Linear Motors.” Ultrasonics Symposium, 2000 IEEE, vol. 1, 2000, pp. 663–66 vol.1, doi:10.1109/ULTSYM.2000.922635. short: 'T. Hemsel, J. Wallaschek, in: Ultrasonics Symposium, 2000 IEEE, 2000, pp. 663–666 vol.1.' date_created: 2019-04-15T09:52:09Z date_updated: 2022-01-06T07:04:05Z department: - _id: '151' doi: 10.1109/ULTSYM.2000.922635 intvolume: ' 1' keyword: - linear motors - ultrasonic motors - linear piezoelectric motor - maximum thrust force - no-load velocity - ultrasonic linear motor - Electromagnetic devices - Electromagnetic fields - Frequency - Friction - Gears - Materials science and technology - Piezoelectric materials - Research and development - Vibrations - Wheels language: - iso: eng page: 663-666 vol.1 publication: Ultrasonics Symposium, 2000 IEEE publication_identifier: issn: - 1051-0117 quality_controlled: '1' status: public title: State of the art and development trends of ultrasonic linear motors type: conference user_id: '55222' volume: 1 year: '2000' ...