Experimental Modeling of Rotary Traveling-Wave Ultrasonic Motor

Abstract

Ultrasonic motor (USM) is difficult to model theoretically because of the complexity and nonlinearity of its working principle. By considering the USM as a black box model, the experimental model of the USM can be determined from the relationship between the input and output measurement data. This paper introduces the composition and working principle of USM. Two-point model method and area model method for obtaining the parameters of the dynamic process of the model are introduced. The simulation analyzes the influence of sampling frequency, environmental noise, and modeling method on the modeling effect. The experimental platform is built and an actual USM is experimentally modeled to verify the feasibility of the modeling method.