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New Concept for Resonant Longitudinal-Shear Ultrasonic Motor

Published online by Cambridge University Press:  15 February 2011

P. Bouchilloux ,
B. Koc  and
K. Uchino
P. Bouchilloux
Affiliation:
Active Materials and Smart Structures Laboratory, Department of Mechanical Engineering, Aeronautical Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, NY [email protected]
B. Koc
Affiliation:
International Center for Actuators and Transducers, Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
K. Uchino
Affiliation:
International Center for Actuators and Transducers, Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
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Abstract

This paper presents an original linear piezoelectric motor for applications in space and robotics. The originality of this motor consists in the combination of longitudinal and shear modes of vibration of the stator. These two modes are mixed to produce an elliptical vibration of the surface of the stator in contact with a slider. The motion of the linear slider is obtained through friction forces that develop at the interface between the stator and the slider.

This motor is being developed for applications in active truss members of variable geometry structures, such as those used in space. Currently, these structures employ stepper motors. It is expected that replacing these electromagnetic devices with ultrasonic motors will offer the following advantages: position-locking without power supply, compactness, nonmagnetic operation, and lower power consumption.

This paper details the design of this motor and emphasizes the novel concept that was developed to combine the longitudinal and shear modes of vibration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 71
Copyright
Copyright © Materials Research Society 2000

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