Control of the nonlinear effect of velocity feedback on multi-DOF micro gyroscope

被引：0
|
作者：
Hao S.-Y. [1 ,2 ]
Song Y.-H. [1 ,2 ]
Li W.-X. [1 ,2 ]
Zhang Q.-C. [3 ]
Liu J. [4 ]
Feng J.-J. [1 ,2 ]
机构：
[1] Tianjin Key Laboratory of Advanced Electromechanical System Design and Intelligent Control, Tianjin University of Technology, Tianjin
[2] National Experimental Teaching Demonstration Center of Mechanical and Electrical Engineering, Tianjin University of Technology, Tianjin
[3] Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin University, Tianjin
[4] Zhengzhou Yutong Heavy Industry Co. Ltd., Zhengzhou
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2021年 / 34卷 / 02期
关键词：
Multi-DOF micro-gyroscope; Multi-scale method; Nonlinear vibration; Stiffness nonlinearity; Velocity feedback;
D O I：
10.16385/j.cnki.issn.1004-4523.2021.02.002
中图分类号：
学科分类号：
摘要：
To reveal the effect of velocity feedback on dynamic characteristics of multi-DOF micro-gyroscope nonlinear systems and explore control methods for nonlinearity, a class of 4-DOF electrostatically driven micro-gyroscopes is researched. The effect of the gain of the delay velocity feedback control on output response of micro-gyroscope is analyzed by multi-scale method. The research shows that the feedback gain mainly affects the amplitude when the time delay is zero. Positive velocity feedback gain amplifies the effect of nonlinearity and new unstable regions appear in the system, then the sensitivity stability is seriously damaged. The stiffness nonlinearity can be controlled well by negative velocity feedback gain and completely eliminated by the reasonable value of negative velocity feedback gain. A method for controlling the sensitivity stability of micro-gyroscopes by adjusting damping action of velocity feedback gain without reducing sensitivity is proposed, which provides a theoretical basis for the optimization and control of multi-DOF micro-gyroscopes with stiffness nonlinearity. © 2021, Editorial Board of Journal of Vibration Engineering. All right reserved.
引用
收藏
页码：227 / 234
页数：7
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