Travelling wave ultrasonic motor for aerospace applications

Details Travelling wave ultrasonic motor for aerospace applications Travelling wave ultrasonic motor for aerospace applications

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.591..329i&link_type=abstract

In: Proceedings of the 11th European Space Mechanisms and Tribology Symposium, ESMATS 2005, 21-23 September 2005, Lucerne, Switz

Computer Science

Mechanisms Components, Ultrasonic Motors, Piezoelectric Transducers, Fem

Scientific paper

In the present work a travelling wave ultrasonic motor (TWUSM) is proposed. It is composed of an annular shaped stator and of two cone-shaped rotors that are pressed in contact to the borders of the inner surface of the stator. A rotating travelling wave has been generated in stator by using as vibration generators two Bolted Langevin Transducers (BLT) opportunely shifted in space and in time. The vibrational behaviour of the stator as well as the travelling wave generation have been simulated with a finite element method (FEM) software. A prototype of the motor has been manufactured and experimentally characterized. It exibits a static torque of about 0.8 N.m and a maximum angular speed of about 300 rpm. Possible variations of the present design aimed to increase output torque or minimize encumbrance are described and discussed.

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