Structure Optimization of Ultrasonic Motor using Longitudinal and Torsional Mode
Sun Heming(1), Zhao Chunsheng(2),Zhu Xiaodong(1),Gao Wei(1)
(1,National Engineering Research Center of Turbogenorator Vibration of SEU)
(2, Research Center of Ultrasonic Motors of NUAA)

Abstract: In this paper ,the structure of ultrasonic motors using longitudinal and torsional mode is optimized. Firstly, the place of piezoelectric ceramic is  optimized, then the displacement amplitude of longitudinal vibration and torsional  vibration is magnified, at last, the contact of stator and rotor should be designed according to FEM analysis is indicated.
Keywords: ultrasonic motor, structure, optimization, piezoelectric.