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Proceedings Paper

Transient behavior of an ultrasonic wobbling-disk motor
Author(s): Stefanie Gutschmidt; Peter Hagedorn
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Paper Abstract

Stationary behavior of a wobbling-disk ultrasonic motor has already been studied in a previous publication with the help of a simple mathematical model. The model is able to capture basic motor features both quantitatively and qualitatively. The mathematical model presented in this paper describes the transient behavior of an ultrasonic wobbling-disk motor. Bending stator vibrations are generated in the ultrasonic motor with the help of a piezoceramic element. Two phase-shifted bending modes cause the upper plate of the stator to undergo a wobbling motion. The rotor is pressed against the stator and driven by frictional forces at the contact point. Both, stator and rotor are modeled as rigid and are elastically supported. The kinematics is described taking into account all geometric nonlinearities. In modeling the transient motion, special attention is given to differentiating between slip and stick contact conditions. Further improvements will include modeling the piezoceramic excitation in more detail. It is presently described by a rotating torque, generating the wobbling motion of the stator.

Paper Details

Date Published: 1 August 2003
PDF: 8 pages
Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003);
Show Author Affiliations
Stefanie Gutschmidt, Darmstadt Univ. of Technology (Germany)
Peter Hagedorn, Darmstadt Univ. of Technology (Germany)

Published in SPIE Proceedings Vol. 5049:
Smart Structures and Materials 2003: Modeling, Signal Processing, and Control
Ralph C. Smith, Editor(s)

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