Optimization research of stator with two degree-of-freedom traveling-wave spherical ultrasonic motor

The driving principle and basic structure of this kind of spherical ultrasonic motor are firstly introduced.Then optimal structure of stator is analyzed. By the established finite element model the stator vibration modal analysis is carried out and the resonance frequency can be calculated. And then according to the optimization conditions for dip angle of stator,the structure of the stator is optimized. Through ANSYS software the modal analysis and the harmonious response analysis in different dip angles of stator can be completed. So relation between resonance frequency of stator and dip angle can be deduced. Finally test of designed stator is carried out by laser vibration test system. The best angle of the stator can be determined and the significant experimental data can also be obtained.The test results show that the optimized stator is more in line with the actual operation characteristics,which is a more accurate guide for the motor design.