Abstract The author has designed and built the prototype machines of standing-wave rotary ultrasonic motor and multiple-vibration-reed standing-wave ultrasonic motor separately on the basis of various vibration modes．In addition，the result of performance test iS offered and the analysis Oil the impact of syntony frequency，voltage and pre-press on their performance is still conducted．And then the author drew the conclusion of their advantages as well as the disadvantages through the comparison of efficiencies and torques of these two types of motors．
FANG Huai-Ying, YANG Jian-Hong, HONG Shang-Ren. Development and comparative experiment study on new-type ultrasonic motor. Chinese Journal of Engineering Design, 2004, 11(5): 265-267.
