关键词: 超声电动机, 振动利用, 压电陶瓷, 瑞利-里兹法

Abstract: In order to improve the power output of the linear ultrasonic motor, the stator of the motor was improved. The rectangular plate of the stator has several holes. The in-plane second-order bending vibration frequency and the first-order longitudinal vibration frequency of the rectangular plate were calculated by Rayleigh-Ritz method. By adjusting the length of the holes on the rectangular plate, the frequency of the two modes were closer, which was instrumental in the same frequency excitation of these two modes. Experiments showed that the amplitude of the stator of the driving foot increases obviously after the rectangular plate was perforated, and the output speed and power of the motor can be significantly improved.

Key words: ultrasonic motor, vibration utilization, piezoelectric ceramics, Rayleigh-Ritz method