&lt;title&gt;Rotary ultrasonic motors actuated by traveling flexural waves&lt;/title&gt;

Bar‐Cohen, Yoseph; Bao, Xiaoqi; Grandia, Willem

doi:10.1117/12.316950

Cited by 18 publications

(11 citation statements)

References 5 publications

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“…In the United States, besides some prestigious universities, the subsidiary bodies of NASA such as the QMI research institution, the jet propulsion laboratory, DARPA and aerospace companies are researching USMs. Extensive research has been conducted in areas such as the life extension of USM, improvement in reliability and operation under ultra-low-temperature (2150u) and ultra-vacuum (10 26 Pa) [4].…”

Section: Foreign Development Status and Analysismentioning

confidence: 99%

Development and application prospects of piezoelectric precision driving technology

Zhao

Zhang

et al. 2008

Front. Mech. Eng. China

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With the rapid development of science and technology, microelectronics manufacturing, photonics technology, space technology, ultra-precision machining, micro-robotics, biomedical engineering and other fields urgently need the support of modern precision driving theory and technology. Modern precision driving technology can be generally divided into two parts: electromagnetic and non-electromagnetic driving technology. Electromagnetic driving technology is based on traditional technology, has a low thrust-weight ratio, and needs deceleration devices with a cumbrous system or a complex structure. Moreover, it is difficult to improve positioning accuracy with this technology type. Thus, electromagnetic driving technology is still unable to meet the requirements for the above applications. Non-electromagnetic driving technology is a new choice. As a category of non-electromagnetic driving technology, piezoelectric driving technology becomes an important branch of modern precision driving technology. High holding torque and acute response make it suitable as an accurate positioning actuator. This paper presents the development of piezoelectric precision driving technology at home and abroad and gives an in-depth analysis. Future perspectives on the technology's applications in the following fields are described: 1) integrated circuit manufacturing technology; 2) fiber optic component manufacturing technology; 3) micro parts manipulation and assembly technology; 4) biomedical engineering; 5) aerospace technology; and 6) ultra-precision processing technology.

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Section: Foreign Development Status and Analysismentioning

confidence: 99%

Development and application prospects of piezoelectric precision driving technology

Zhao

Zhang

et al. 2008

Front. Mech. Eng. China

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“…Y. BarCohen et al (1998) [50] used modified annular finite elements which are based on the symmetrical characteristics of rotary piezoelectric motors. The details of the method can be found in [51].…”

Section: Finite Element and Finite Difference Analy-sis Of The Statormentioning

confidence: 99%

Modelización del estator de un motor piezoeléctrico de onda viajera: una revision integrada y nueva perspectiva

Rodríguez¹,

Ceres²,

Calderón³

et al. 2004

Bol. Soc. Esp. Ceram. Vidr.

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Articles from different areas which are closely related to the modelling of the stator of travelling wave ultrasonic motors (TWUMs) are reviewed in this work. Thus, important issues relevant to this problem are identified from the areas of vibration of annular plates, laminated plate theories, and modelling of piezoelectric transducers. From this integrated point of view, it becomes clear that there are some very important issues yet to be addressed in the modelling of TWUMs. Firstly, the influence of material properties and stator dimensions on output efficiency, electromechanical coupling coefficients (EMCC) and maximum output energy is to be investigated in more detail. Secondly, the modelling of the electric potential field (by explicitly including the charge equation) for TWUMs seems to be a must for better prediction of displacements and electric fields close to the resonance, as suggested by some recent works [1]. Moreover, the improvement of current models by using shear deformation (or higher order) laminated plate theories (LPTs) in conjunction with approximated methods of solution are discussed. In addition to analytical models, those works using Finite Element and Finite difference Methods (FEM and FDM) for the modelling and simulation of the TWUM stator dynamics are reviewed. Keywords: analytical model, piezoelectric motor, resonant actuation Modelización del estator de un motor piezoeléctrico de onda viajera: una revision integrada y nueva perspectivaEn este trabajo se realiza una revisión de los trabajos de investigación realizados en diversas áreas sobre el modelado del estátor de los motores ultrasónicos de onda viajera (TWUMs). Entre los problemas relevantes que se han estudiado podemos citar la vibración de placas anulares, las teorías de placas laminadas y el modelado de transductores piezoeléctricos. A raíz de este punto de vista integral se hace manifiesto que todavía quedan asuntos importantes que estudiar en el modelado de los TWUMs. En primer lugar, la influencia de las propiedades del material y las dimensiones del estátor en la eficiencia del motor, los coeficientes de acoplamiento electromecánico (EMCC) y la máxima energía entregada deberían ser estudiados más detenidamente. En segundo lugar, el modelado de la distribución del campo eléctrico en los TWUMs (incluyendo la ecuación de carga explícitamente) parece imprescindible para lograr una predicción mejor del desplazamiento y del campo eléctrico cerca de la resonancia, como se ha apuntado en referencias actuales [1]. Además, se discute las mejoras que incorporaría a los modelos existentes en la actualidad la inclusión de las teorías de placas laminadas (LPTs) con deformaciones de corte (o de orden superior), resueltas mediante métodos aproximados. Como complemento a los modelos analíticos, se realiza asimismo una revisión de las técnicas de elementos finitos (FEM) y diferencias finitas (FDM) empleadas en la simulación de la dinámica del estátor de los motores TWUM.

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“…Thus, the ultrasonic motor (USM) has already achieved to find its place in such industrial sectors. In particular, the traveling wave ultrasonic servomotor (TWUM) has already been tested recently in aerospace by the NASA to operate in cryogenic temperature (17) as well as in ultra high vacuum conditions (1). Moreover for aeronautics, in the current " fly-by-wire " era, some authors developed ultrasonic motor control strategies so as to implement active control sticks which allow the pilot to feel the force feedback from the rudders (2), (7).…”

Section: Introductionmentioning

confidence: 99%

Robust Control of Ultrasonic Motor Operating under Severe Operating Conditions

Boukhnifer¹,

Ferreira²,

Aubry³

2010

Mechatronic Systems Simulation Modeling and Control

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Ultrasonic motor technology is a key system component in integrated mechatronics devices working on extreme operating conditions subjected to thermal cyclings or large thermal variations, EM disturbances, radiations, corrosion, or strong vibrations. Due to these constraints, robustness of the mechanics/electronics/control interfaces should be taken into account in the motor design. A robust controller for a travelling wave ultrasonic motor (TWUM) is considered in this study for operation in extreme environmental conditions. A simple causal model of the TWUM is introduced for identification of motor parameters. Then, an H ∞ loop shaping synthesis procedure is implemented in order to obtain a good compromise between environmental robustness and motor's performances. Finally, simulation and experimental results demonstrate the effectiveness of the proposed robust controller in extreme operating conditions.

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<title>Rotary ultrasonic motors actuated by traveling flexural waves</title>

Cited by 18 publications

References 5 publications

Development and application prospects of piezoelectric precision driving technology

Development and application prospects of piezoelectric precision driving technology

Modelización del estator de un motor piezoeléctrico de onda viajera: una revision integrada y nueva perspectiva

Robust Control of Ultrasonic Motor Operating under Severe Operating Conditions

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