[{"date_updated":"2023-09-25T08:09:24Z","_id":"21232","article_number":"106389","doi":"10.1016/j.ultras.2021.106389","year":"2021","citation":{"chicago":"Itner, Dominik, Hauke Gravenkamp, Dmitrij Dreiling, Nadine Feldmann, and Bernd Henning. “Efficient Semi-Analytical Simulation of Elastic Guided Waves in Cylinders Subject to Arbitrary Non-Symmetric Loads.” Ultrasonics, 2021. https://doi.org/10.1016/j.ultras.2021.106389.","ama":"Itner D, Gravenkamp H, Dreiling D, Feldmann N, Henning B. Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads. Ultrasonics. Published online 2021. doi:10.1016/j.ultras.2021.106389","apa":"Itner, D., Gravenkamp, H., Dreiling, D., Feldmann, N., & Henning, B. (2021). Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads. Ultrasonics, Article 106389. https://doi.org/10.1016/j.ultras.2021.106389","bibtex":"@article{Itner_Gravenkamp_Dreiling_Feldmann_Henning_2021, title={Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads}, DOI={10.1016/j.ultras.2021.106389}, number={106389}, journal={Ultrasonics}, author={Itner, Dominik and Gravenkamp, Hauke and Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd}, year={2021} }","mla":"Itner, Dominik, et al. “Efficient Semi-Analytical Simulation of Elastic Guided Waves in Cylinders Subject to Arbitrary Non-Symmetric Loads.” Ultrasonics, 106389, 2021, doi:10.1016/j.ultras.2021.106389.","short":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, Ultrasonics (2021).","ieee":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, and B. Henning, “Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads,” Ultrasonics, Art. no. 106389, 2021, doi: 10.1016/j.ultras.2021.106389."},"type":"journal_article","language":[{"iso":"eng"}],"title":"Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads","user_id":"32616","author":[{"last_name":"Itner","full_name":"Itner, Dominik","first_name":"Dominik"},{"full_name":"Gravenkamp, Hauke","first_name":"Hauke","last_name":"Gravenkamp"},{"first_name":"Dmitrij","full_name":"Dreiling, Dmitrij","last_name":"Dreiling","id":"32616"},{"full_name":"Feldmann, Nadine","first_name":"Nadine","id":"23082","last_name":"Feldmann"},{"first_name":"Bernd","full_name":"Henning, Bernd","last_name":"Henning","id":"213"}],"quality_controlled":"1","publication":"Ultrasonics","department":[{"_id":"49"}],"publication_identifier":{"issn":["0041-624X"]},"publication_status":"published","status":"public","project":[{"_id":"89","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","grant_number":"409779252"}],"date_created":"2021-02-15T09:53:32Z"},{"title":"Study on optimizing ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal method","department":[{"_id":"151"}],"publication_identifier":{"issn":["0041-624X"]},"date_updated":"2019-09-16T10:54:27Z","doi":"10.1016/j.ultras.2012.12.003","language":[{"iso":"eng"}],"abstract":[{"text":"The hydrothermal method utilizes a solution-based chemical reaction to synthesize piezoelectric thin films and powders. This method has a number of advantages, such as low-temperature synthesis, and high purity and high quality of the product. In order to promote hydrothermal reactions, we developed an ultrasonic assisted hydrothermal method and confirmed that it produces dense and thick lead--zirconate--titanate (PZT) films. In the hydrothermal method, a crystal growth process follows the nucleation process. In this study, we verified that ultrasonic irradiation is effective for the nucleation process, and there is an optimum irradiation period to obtain thicker PZT films. With this optimization, a 9.2-$\\mu$ m-thick PZT polycrystalline film was obtained in a single deposition process. For this film, ultrasonic irradiation was carried out from the beginning of the reaction for 18 h, followed by a 6 h deposition without ultrasonic irradiation. These results indicate that the ultrasonic irradiation mainly promotes the nucleation process.","lang":"eng"}],"user_id":"55222","author":[{"last_name":"Ohta","full_name":"Ohta, Kanako","first_name":"Kanako"},{"first_name":"Gaku","full_name":"Isobe, Gaku","last_name":"Isobe"},{"last_name":"Bornmann","full_name":"Bornmann, Peter","first_name":"Peter"},{"full_name":"Hemsel, Tobias","first_name":"Tobias","id":"210","last_name":"Hemsel"},{"first_name":"Takeshi","full_name":"Morita, Takeshi","last_name":"Morita"}],"quality_controlled":"1","keyword":["Piezoelectric material"],"publication":"Ultrasonics","status":"public","date_created":"2019-05-20T12:03:07Z","volume":53,"intvolume":" 53","_id":"9866","issue":"4","citation":{"short":"K. Ohta, G. Isobe, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics 53 (2013) 837–841.","ieee":"K. Ohta, G. Isobe, P. Bornmann, T. Hemsel, and T. Morita, “Study on optimizing ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal method,” Ultrasonics, vol. 53, no. 4, pp. 837–841, 2013.","chicago":"Ohta, Kanako, Gaku Isobe, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Study on Optimizing Ultrasonic Irradiation Period for Thick Polycrystalline PZT Film by Hydrothermal Method.” Ultrasonics 53, no. 4 (2013): 837–41. https://doi.org/10.1016/j.ultras.2012.12.003.","apa":"Ohta, K., Isobe, G., Bornmann, P., Hemsel, T., & Morita, T. (2013). Study on optimizing ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal method. Ultrasonics, 53(4), 837–841. https://doi.org/10.1016/j.ultras.2012.12.003","ama":"Ohta K, Isobe G, Bornmann P, Hemsel T, Morita T. Study on optimizing ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal method. Ultrasonics. 2013;53(4):837-841. doi:10.1016/j.ultras.2012.12.003","bibtex":"@article{Ohta_Isobe_Bornmann_Hemsel_Morita_2013, title={Study on optimizing ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal method}, volume={53}, DOI={10.1016/j.ultras.2012.12.003}, number={4}, journal={Ultrasonics}, author={Ohta, Kanako and Isobe, Gaku and Bornmann, Peter and Hemsel, Tobias and Morita, Takeshi}, year={2013}, pages={837–841} }","mla":"Ohta, Kanako, et al. “Study on Optimizing Ultrasonic Irradiation Period for Thick Polycrystalline PZT Film by Hydrothermal Method.” Ultrasonics, vol. 53, no. 4, 2013, pp. 837–41, doi:10.1016/j.ultras.2012.12.003."},"type":"journal_article","year":"2013","page":"837 - 841"},{"title":"Piezoelectric transducer design via multiobjective optimization","department":[{"_id":"151"}],"publication_identifier":{"issn":["0041-624X"]},"date_updated":"2022-01-06T07:04:16Z","doi":"10.1016/j.ultras.2006.05.087","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"The design of piezoelectric transducers is usually based on single-objective optimization only. In most practical applications of piezoelectric transducers, however, there exist multiple design objectives that often are contradictory to each other by their very nature. It is impossible to find a solution at which each objective function gets its optimal value simultaneously. Our design approach is to first find a set of Pareto-optimal solutions, which can be considered to be best compromises among multiple design objectives. Among these Pareto-optimal solutions, the designer can then select the one solution which he considers to be the best one. In this paper we investigate the optimal design of a Langevin transducer. The design problem is formulated mathematically as a constrained multiobjective optimization problem. The maximum vibration amplitude and the minimum electrical input power are considered as optimization objectives. Design variables involve continuous variables (dimensions of the transducer) and discrete variables (the number of piezoelectric rings and material types). In order to formulate the optimization problem, the behavior of piezoelectric transducers is modeled using the transfer matrix method based on analytical models. Multiobjective evolutionary algorithms are applied in the optimization process and a set of Pareto-optimal designs is calculated. The optimized results are analyzed and the preferred design is determined. "}],"user_id":"55222","quality_controlled":"1","author":[{"last_name":"Fu","first_name":"Bo","full_name":"Fu, Bo"},{"last_name":"Hemsel","id":"210","first_name":"Tobias","full_name":"Hemsel, Tobias"},{"last_name":"Wallaschek","first_name":"Jörg","full_name":"Wallaschek, Jörg"}],"publication":"Ultrasonics","keyword":["Piezoelectric transducer"],"status":"public","date_created":"2019-04-29T08:50:23Z","volume":"44, Supplement","_id":"9533","type":"journal_article","citation":{"ieee":"B. Fu, T. Hemsel, and J. Wallaschek, “Piezoelectric transducer design via multiobjective optimization,” Ultrasonics, vol. 44, Supplement, pp. e747–e752, 2006.","short":"B. Fu, T. Hemsel, J. Wallaschek, Ultrasonics 44, Supplement (2006) e747–e752.","bibtex":"@article{Fu_Hemsel_Wallaschek_2006, title={Piezoelectric transducer design via multiobjective optimization}, volume={44, Supplement}, DOI={10.1016/j.ultras.2006.05.087}, journal={Ultrasonics}, author={Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}, year={2006}, pages={e747–e752} }","mla":"Fu, Bo, et al. “Piezoelectric Transducer Design via Multiobjective Optimization.” Ultrasonics, vol. 44, Supplement, 2006, pp. e747–52, doi:10.1016/j.ultras.2006.05.087.","ama":"Fu B, Hemsel T, Wallaschek J. Piezoelectric transducer design via multiobjective optimization. Ultrasonics. 2006;44, Supplement:e747-e752. doi:10.1016/j.ultras.2006.05.087","apa":"Fu, B., Hemsel, T., & Wallaschek, J. (2006). Piezoelectric transducer design via multiobjective optimization. Ultrasonics, 44, Supplement, e747–e752. https://doi.org/10.1016/j.ultras.2006.05.087","chicago":"Fu, Bo, Tobias Hemsel, and Jörg Wallaschek. “Piezoelectric Transducer Design via Multiobjective Optimization.” Ultrasonics 44, Supplement (2006): e747–52. https://doi.org/10.1016/j.ultras.2006.05.087."},"year":"2006","page":"e747 - e752"},{"doi":"10.1016/j.ultras.2006.05.056","date_updated":"2022-01-06T07:04:16Z","language":[{"iso":"eng"}],"title":"Piezoelectric linear motor concepts based on coupling of longitudinal vibrations","publication_identifier":{"issn":["0041-624X"]},"department":[{"_id":"151"}],"issue":"0","_id":"9539","citation":{"apa":"Hemsel, T., Mracek, M., Twiefel, J., & Vasiljev, P. (2006). Piezoelectric linear motor concepts based on coupling of longitudinal vibrations. Ultrasonics, 44, Supplement(0), e591–e596. https://doi.org/10.1016/j.ultras.2006.05.056","ama":"Hemsel T, Mracek M, Twiefel J, Vasiljev P. Piezoelectric linear motor concepts based on coupling of longitudinal vibrations. Ultrasonics. 2006;44, Supplement(0):e591-e596. doi:10.1016/j.ultras.2006.05.056","chicago":"Hemsel, Tobias, Maik Mracek, Jens Twiefel, and Piotr Vasiljev. “Piezoelectric Linear Motor Concepts Based on Coupling of Longitudinal Vibrations.” Ultrasonics 44, Supplement, no. 0 (2006): e591–96. https://doi.org/10.1016/j.ultras.2006.05.056.","mla":"Hemsel, Tobias, et al. “Piezoelectric Linear Motor Concepts Based on Coupling of Longitudinal Vibrations.” Ultrasonics, vol. 44, Supplement, no. 0, 2006, pp. e591–96, doi:10.1016/j.ultras.2006.05.056.","bibtex":"@article{Hemsel_Mracek_Twiefel_Vasiljev_2006, title={Piezoelectric linear motor concepts based on coupling of longitudinal vibrations}, volume={44, Supplement}, DOI={10.1016/j.ultras.2006.05.056}, number={0}, journal={Ultrasonics}, author={Hemsel, Tobias and Mracek, Maik and Twiefel, Jens and Vasiljev, Piotr}, year={2006}, pages={e591–e596} }","short":"T. Hemsel, M. Mracek, J. Twiefel, P. Vasiljev, Ultrasonics 44, Supplement (2006) e591–e596.","ieee":"T. Hemsel, M. Mracek, J. Twiefel, and P. Vasiljev, “Piezoelectric linear motor concepts based on coupling of longitudinal vibrations,” Ultrasonics, vol. 44, Supplement, no. 0, pp. e591–e596, 2006."},"type":"journal_article","year":"2006","page":"e591 - e596","user_id":"55222","abstract":[{"lang":"eng","text":"Classically, rotary motors with gears and spindle mechanisms are used to achieve translatory motion. In means of miniaturization and weight reduction piezoelectric linear motors are of interest. Several ultrasonic linear motors found in literature base on the use of two different vibration modes. Most often flexural and longitudinal modes are combined to achieve an elliptic micro-motion of surface points. This micro-motion is converted to direct linear (or translatory) motion of a driven slider. To gain high amplitudes of the micro-motion and thus having a powerful motor, the ultrasonic vibrator should be driven near the eigenfrequency of its modes. Additionally, low mechanical and electrical losses lead to increased efficiency and large amplitude magnification in resonance. This demands a geometrical design that fits the eigenfrequencies of the two different modes. A frequency-deviation of only a few percent leads to non-acceptable disturbance of the elliptical motion. Thus, the mechanical design of the vibrators has to be done very carefully. Within this contribution we discuss different motor designs based on the coupling of two the same longitudinal vibrations within one structure to generate an elliptic motion of surface points. Different concepts based on piezoelectric plates and Langevin transducers are compared. Benefits and drawbacks against the combination of longitudinal and bending modes will be discussed. Numerical results of the stator vibration as well as motor characteristics are validated by measurements on different prototypes. "}],"status":"public","date_created":"2019-04-29T09:03:50Z","volume":"44, Supplement","author":[{"full_name":"Hemsel, Tobias","first_name":"Tobias","id":"210","last_name":"Hemsel"},{"last_name":"Mracek","first_name":"Maik","full_name":"Mracek, Maik"},{"last_name":"Twiefel","full_name":"Twiefel, Jens","first_name":"Jens"},{"last_name":"Vasiljev","first_name":"Piotr","full_name":"Vasiljev, Piotr"}],"quality_controlled":"1","keyword":["Piezoelectric linear motor"],"publication":"Ultrasonics"},{"user_id":"55222","abstract":[{"text":"Piezoelectric transformers are increasingly getting popular in the electrical devices owing to several advantages such as small size, high efficiency, no electromagnetic noise and non-flammable. In addition to the conventional applications such as ballast for back light inverter in notebook computers, camera flash, and fuel ignition several new applications have emerged such as AC/DC converter, battery charger and automobile lighting. These new applications demand high power density and wide range of voltage gain. Currently, the transformer power density is limited to $40 W/cm{^3}$ obtained at low voltage gain. The purpose of this study was to investigate a transformer design that has the potential of providing higher power density and wider range of voltage gain. The new transformer design utilizes radial mode both at the input and output port and has the unidirectional polarization in the ceramics. This design was found to provide 30 W power with an efficiency of 98\\% and 30 $\\,^{\\circ}$C temperature rise from the room temperature. An electro-mechanical equivalent circuit model was developed to describe the characteristics of the piezoelectric transformer. The model was found to successfully predict the characteristics of the transformer. Excellent matching was found between the computed and experimental results. The results of this study will allow to deterministically design unipoled piezoelectric transformers with specified performance. It is expected that in near future the unipoled transformer will gain significant importance in various electrical components.","lang":"eng"}],"date_created":"2019-04-29T09:22:21Z","status":"public","volume":"44, Supplement","publication":"Ultrasonics","keyword":["Piezoelectric transformers"],"quality_controlled":"1","author":[{"first_name":"Tobias","full_name":"Hemsel, Tobias","last_name":"Hemsel","id":"210"},{"last_name":"Priya","first_name":"S","full_name":"Priya, S"}],"issue":"0","_id":"9541","page":"e741 - e745","type":"journal_article","year":"2006","citation":{"mla":"Hemsel, Tobias, and S. Priya. “Model Based Analysis of Piezoelectric Transformers.” Ultrasonics, vol. 44, Supplement, no. 0, 2006, pp. e741–45, doi:10.1016/j.ultras.2006.05.086.","bibtex":"@article{Hemsel_Priya_2006, title={Model based analysis of piezoelectric transformers}, volume={44, Supplement}, DOI={10.1016/j.ultras.2006.05.086}, number={0}, journal={Ultrasonics}, author={Hemsel, Tobias and Priya, S}, year={2006}, pages={e741–e745} }","chicago":"Hemsel, Tobias, and S Priya. “Model Based Analysis of Piezoelectric Transformers.” Ultrasonics 44, Supplement, no. 0 (2006): e741–45. https://doi.org/10.1016/j.ultras.2006.05.086.","apa":"Hemsel, T., & Priya, S. (2006). Model based analysis of piezoelectric transformers. Ultrasonics, 44, Supplement(0), e741–e745. https://doi.org/10.1016/j.ultras.2006.05.086","ama":"Hemsel T, Priya S. Model based analysis of piezoelectric transformers. Ultrasonics. 2006;44, Supplement(0):e741-e745. doi:10.1016/j.ultras.2006.05.086","ieee":"T. Hemsel and S. Priya, “Model based analysis of piezoelectric transformers,” Ultrasonics, vol. 44, Supplement, no. 0, pp. e741–e745, 2006.","short":"T. Hemsel, S. Priya, Ultrasonics 44, Supplement (2006) e741–e745."},"title":"Model based analysis of piezoelectric transformers","publication_identifier":{"issn":["0041-624X"]},"department":[{"_id":"151"}],"doi":"10.1016/j.ultras.2006.05.086","date_updated":"2022-01-06T07:04:16Z","language":[{"iso":"eng"}]},{"_id":"9543","page":"e341 - e344","year":"2006","type":"journal_article","citation":{"chicago":"Lierke, E.G., and Tobias Hemsel. “Focusing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors.” Ultrasonics 44, Supplement (2006): e341–44. https://doi.org/10.1016/j.ultras.2006.07.004.","apa":"Lierke, E. G., & Hemsel, T. (2006). Focusing cross-fire applicator for ultrasonic hyperthermia of tumors. Ultrasonics, 44, Supplement, e341–e344. https://doi.org/10.1016/j.ultras.2006.07.004","ama":"Lierke EG, Hemsel T. Focusing cross-fire applicator for ultrasonic hyperthermia of tumors. Ultrasonics. 2006;44, Supplement:e341-e344. doi:10.1016/j.ultras.2006.07.004","bibtex":"@article{Lierke_Hemsel_2006, title={Focusing cross-fire applicator for ultrasonic hyperthermia of tumors}, volume={44, Supplement}, DOI={10.1016/j.ultras.2006.07.004}, journal={Ultrasonics}, author={Lierke, E.G. and Hemsel, Tobias}, year={2006}, pages={e341–e344} }","mla":"Lierke, E. G., and Tobias Hemsel. “Focusing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors.” Ultrasonics, vol. 44, Supplement, 2006, pp. e341–44, doi:10.1016/j.ultras.2006.07.004.","short":"E.G. Lierke, T. Hemsel, Ultrasonics 44, Supplement (2006) e341–e344.","ieee":"E. G. Lierke and T. Hemsel, “Focusing cross-fire applicator for ultrasonic hyperthermia of tumors,” Ultrasonics, vol. 44, Supplement, pp. e341–e344, 2006."},"user_id":"55222","abstract":[{"lang":"eng","text":"An improved concept for ultrasonic hyperthermia of tumors is presented. This concept is based on past experience of a German government supported project [1], which ended in 1984. It offers a low cost alternative to common RF- and microwave methods for hyperthermia of tumors with volumes between 1 and 40 ml at treatment times between 30 and 60 min. Our new version of the system considerably improves the temperature suppression in the healthy tissue around the target area and enables the adjustment of the beam width to the actual tumor size and the field geometry to the depth and shape of the tumor. The applicator can be used for moderate hyperthermia with tissue overheating up to 10 K or for ablation therapy with short high temperature pulses. Its central area is free for the integration of a commercial ultrasonic diagnostic sector scanner or a Doppler flow sensor in order to support the adjustment of the transducer and to monitor the whole area during the therapy."}],"volume":"44, Supplement","date_created":"2019-04-29T09:27:27Z","status":"public","keyword":["Moderate hyperthermia"],"publication":"Ultrasonics","author":[{"last_name":"Lierke","first_name":"E.G.","full_name":"Lierke, E.G."},{"last_name":"Hemsel","id":"210","first_name":"Tobias","full_name":"Hemsel, Tobias"}],"quality_controlled":"1","doi":"10.1016/j.ultras.2006.07.004","date_updated":"2022-01-06T07:04:16Z","language":[{"iso":"eng"}],"title":"Focusing cross-fire applicator for ultrasonic hyperthermia of tumors","publication_identifier":{"issn":["0041-624X"]},"department":[{"_id":"151"}]},{"_id":"9546","page":"e597 - e602","type":"journal_article","year":"2006","citation":{"ieee":"M. Mracek and T. Hemsel, “Synergetic driving concepts for bundled miniature ultrasonic linear motors,” Ultrasonics, vol. 44, Supplement, pp. e597–e602, 2006.","short":"M. Mracek, T. Hemsel, Ultrasonics 44, Supplement (2006) e597–e602.","mla":"Mracek, Maik, and Tobias Hemsel. “Synergetic Driving Concepts for Bundled Miniature Ultrasonic Linear Motors.” Ultrasonics, vol. 44, Supplement, 2006, pp. e597–602, doi:10.1016/j.ultras.2006.05.201.","bibtex":"@article{Mracek_Hemsel_2006, title={Synergetic driving concepts for bundled miniature ultrasonic linear motors}, volume={44, Supplement}, DOI={10.1016/j.ultras.2006.05.201}, journal={Ultrasonics}, author={Mracek, Maik and Hemsel, Tobias}, year={2006}, pages={e597–e602} }","ama":"Mracek M, Hemsel T. Synergetic driving concepts for bundled miniature ultrasonic linear motors. Ultrasonics. 2006;44, Supplement:e597-e602. doi:10.1016/j.ultras.2006.05.201","apa":"Mracek, M., & Hemsel, T. (2006). Synergetic driving concepts for bundled miniature ultrasonic linear motors. Ultrasonics, 44, Supplement, e597–e602. https://doi.org/10.1016/j.ultras.2006.05.201","chicago":"Mracek, Maik, and Tobias Hemsel. “Synergetic Driving Concepts for Bundled Miniature Ultrasonic Linear Motors.” Ultrasonics 44, Supplement (2006): e597–602. https://doi.org/10.1016/j.ultras.2006.05.201."},"abstract":[{"lang":"eng","text":"Rotary ultrasonic motors have found broad industrial application in camera lens drives and other systems. Linear ultrasonic motors in contrast have only found limited applications. The main reason for the limited range of application of these very attractive devices seems to be their small force and power range. Attempts to build linear ultrasonic motors for high forces and high power applications have not been truly successful yet. To achieve larger force and higher power, multiple miniaturized motors can be combined. This approach, however, is not as simple as it appears at first glance. The electromechanical behaviour of the individual motors differs slightly due to manufacturing and assembly tolerances. The individual motor characteristics are strongly dependent on the driving parameters (frequency, voltage, temperature, pre-stress, etc.) and the driven load and the collective behaviour of the swarm of motors is not just the linear superposition of the individual drive's forces. Thus, the bundle of motors has to be synchronized and controlled appropriately in order to obtain an optimized drive that is not oversized and costly. We have investigated driving and control strategies of a set of linear ultrasonic motors. Our contribution will be divided into three main parts. In part I ultrasonic linear motors will be introduced. In part II driving strategies for a single motor as well as for a bundle of motors will be presented. These concepts will be verified by simulation results and experimental data. In part III a simplified model for the motor's electromechanical behaviour will be given."}],"user_id":"55222","publication":"Ultrasonics","keyword":["Ultrasonic linear motor"],"author":[{"first_name":"Maik","full_name":"Mracek, Maik","last_name":"Mracek"},{"last_name":"Hemsel","id":"210","first_name":"Tobias","full_name":"Hemsel, Tobias"}],"quality_controlled":"1","date_created":"2019-04-29T09:34:16Z","status":"public","volume":"44, Supplement","date_updated":"2022-01-06T07:04:16Z","doi":"10.1016/j.ultras.2006.05.201","language":[{"iso":"eng"}],"title":"Synergetic driving concepts for bundled miniature ultrasonic linear motors","department":[{"_id":"151"}],"publication_identifier":{"issn":["0041-624X"]}},{"type":"journal_article","citation":{"short":"T. Hemsel, J. Wallaschek, Ultrasonics 38 (2000) 37–40.","ieee":"T. Hemsel and J. Wallaschek, “Survey of the present state of the art of piezoelectric linear motors,” Ultrasonics, vol. 38, pp. 37–40, 2000.","chicago":"Hemsel, Tobias, and Jörg Wallaschek. “Survey of the Present State of the Art of Piezoelectric Linear Motors.” Ultrasonics 38 (2000): 37–40. https://doi.org/10.1016/S0041-624X(99)00143-2.","ama":"Hemsel T, Wallaschek J. Survey of the present state of the art of piezoelectric linear motors. Ultrasonics. 2000;38:37-40. doi:10.1016/S0041-624X(99)00143-2","apa":"Hemsel, T., & Wallaschek, J. (2000). Survey of the present state of the art of piezoelectric linear motors. Ultrasonics, 38, 37–40. https://doi.org/10.1016/S0041-624X(99)00143-2","bibtex":"@article{Hemsel_Wallaschek_2000, title={Survey of the present state of the art of piezoelectric linear motors}, volume={38}, DOI={10.1016/S0041-624X(99)00143-2}, journal={Ultrasonics}, author={Hemsel, Tobias and Wallaschek, Jörg}, year={2000}, pages={37–40} }","mla":"Hemsel, Tobias, and Jörg Wallaschek. “Survey of the Present State of the Art of Piezoelectric Linear Motors.” Ultrasonics, vol. 38, 2000, pp. 37–40, doi:10.1016/S0041-624X(99)00143-2."},"year":"2000","page":"37 - 40","_id":"8914","intvolume":" 38","quality_controlled":"1","author":[{"id":"210","last_name":"Hemsel","full_name":"Hemsel, Tobias","first_name":"Tobias"},{"full_name":"Wallaschek, Jörg","first_name":"Jörg","last_name":"Wallaschek"}],"publication":"Ultrasonics","keyword":["Linear motor"],"volume":38,"status":"public","date_created":"2019-04-15T09:42:32Z","abstract":[{"lang":"eng","text":"Piezoelectric ultrasonic motors have been investigated for several years and have already found their first practical applications. Their key feature is that they are able to produce a high thrust force related to their volume. Beside rotary drives like the travelling wave motor, linear drives have also been developed, but only a few are presently commercially available. In the present paper, we first describe the state of the art of linear piezoelectric motors. The motors are characterized with respect to their no-load velocity, maximum thrust force, efficiency and other technical properties. In the second part, we present a new motor, which is judged to be capable of surpassing the characteristics of other piezoelectric motors because of its unique design which allows the piezoelectric drive elements to be pre-stressed in the direction of their polarization. The piezoelectric elements convert energy using the longitudinal d33 effect which allows an improved reliability, large vibration amplitudes and excellent piezoelectric coupling. Energy loss by vibration damping is minimized, and the efficiency can be improved significantly. Experimental results show that the motor characteristics can be optimized for a particular task by choosing the appropriate operating parameters such as exciting voltage, exciting frequency and normal force. "}],"user_id":"55222","language":[{"iso":"eng"}],"date_updated":"2022-01-06T07:04:05Z","doi":"10.1016/S0041-624X(99)00143-2","department":[{"_id":"151"}],"publication_identifier":{"issn":["0041-624X"]},"title":"Survey of the present state of the art of piezoelectric linear motors"}]