Research on speed test system of ultrasonic motor

摘要

Ultrasonic motor (USM) is a basic component which utilizes the inverse piezoelectric effect and the friction interface to work. It is driven by the collective effect of parameters such as amplitude, the frequency and the phase difference of excitation signals. The output torque and speed show a strong nonlinear characteristic with excitation signals. In order to deepen the theoretical and experimental comparison of the drive characteristics of USM and master the mechanism of various factors that affect the mechanical properties of USM. This paper established a USM full parameters test system to lay a hardware foundation for the study of multi-parameter composite control algorithms. After a brief analysis of the principle of speed control of USM, this paper used the test system to test the USM.