Modal disturbance investigation of rod-shaped ultrasonic motor using bending vibrations

被引：2
|
作者：
Zhang J. [1 ]
Zhu H. [1 ]
Zhao C. [1 ]
机构：
[1] Precision Driving Laboratory, Nanjing University of Aeronautics and Astronautics
来源：
Frontiers of Mechanical Engineering in China | 2008年 / 3卷 / 3期
关键词：
Finite element; Modal analysis; Sensitivity analysis; Ultrasonic motor;
D O I：
10.1007/s11465-008-0058-6
中图分类号：
学科分类号：
摘要：
Modal disturbance of a rod-shaped ultrasonic motor using bending vibrations can cause problems such as low motor efficiency, instability, and poor control. In this paper, a dynamic analysis model of a stator is created on the basis of the finite element method (FEM) and Hamilton principle. The modal frequency sensitivities of the stator to the structure parameters are investigated by modal analysis. Accordingly, the structure parameters of the stator are modified to separate working modes from disturbance modes. A rod-shaped ultrasonic motor stator is fabricated, and the experimental results of its amplitude frequency response characteristics show that the purpose of modal separation is achieved. The frequency separation between working modes and disturbance modes is more than 2 kHz. The validity of the method is verified. © 2008 Higher Education Press and Springer-Verlag GmbH.
引用
收藏
页码：343 / 347
页数：4
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