A new gyro torquer's non-circular error compensation method

被引：0
|
作者：
Chen G. [1 ]
Wang H. [1 ]
Ren Y. [1 ]
Xin C. [1 ]
机构：
[1] Department of Aerospace Science and Technology, Space Engineering University, Beijing
来源：
Ren, Yuan (renyuan_823@aliyun.com) | 1755年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 44期
基金：
中国国家自然科学基金;
关键词：
Attitude angular velocity sensitivity; Lorentz force magnetic bearing (LFMB); Magnetically suspended control sensitive gyroscope (MSCSG); Non-circular error compensation; Torquer;
D O I：
10.13700/j.bh.1001-5965.2017.0604
中图分类号：
学科分类号：
摘要：
Based on the structural design of the Lorentz force magnetic bearing (LFMB), a kind of torquer's non-circular error compensation method is put forward to enhance the sensitivity accuracy of magnetically suspended control sensitive gyroscope (MSCSG) to gyro carrier attitude. First, for a new type MSCSG with double spherical envelope rotor, the structure features of MSCSG and the attitude angular velocity measurement principle of the gyro carrier are introduced and the radius error model of MSCSG torquer, the interference torque model of rotor's deflection and the measurement error model of the gyro carrier's attitude angular velocity are set up. Then, the roundness of torquer is measured through the experiment, and data fitting is conducted by MATLAB to obtain the non-circular characteristic of the torquer. The non-circular characteristic is described by Legendre polynomial series, and the measurement error of the gyro carrier's attitude angular velocity caused by the torquer's non-circular error is compensated effectively. Finally, the effect of error compensation is verified by the simulation and the results show that the compensation method makes the measurement error of the gyro carrier's attitude angular velocity reduce by 83.5%. In addition, the proposed method can solve the common problems related to LFMB gyro. © 2018, Editorial Board of JBUAA. All right reserved.
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页码：1755 / 1763
页数：8
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