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Modelling and Simulation in Engineering
Volume 2011, Article ID 275158, 6 pages
Research Article

Steady-State Fuzzy Modeling of Ultrasonic Motor System

Electronic Information Engineering College, Henan University of Science and Technology, Luoyang 471000, China

Received 24 March 2011; Revised 6 September 2011; Accepted 6 September 2011

Academic Editor: Agostino Bruzzone

Copyright © 2011 Shi Jingzhuo and Lv Lin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Because of the complicated energy conversion process, ultrasonic motor has remarkable nonlinearity. Therefore, it is difficult to achieve accurate speed control of ultrasonic motor. In general, a good model is the foundation of the accurate control effect. Because of the remarkable non-linearity of ultrasonic motor, the model should also be nonlinear. In this paper, the two-input and one-output steady-state model of ultrasonic motor system is worked out using fuzzy reasoning modeling method. Comparison between experimental data and calculated data of the model prove that the model can well simulate the nonlinear relationship among the amplitude of driving voltage, frequency, and rotating speed.