Real-Time Compensation of Errors Caused by the Flux Density Non-uniformity for a Magnetically Suspended Sensitive Gyroscope

다국어 초록 (Multilingual Abstract)

Magnetically suspended sensitive gyroscopes (MSSGs) provide an interesting alternative for achieving precious attitude angular measurement. To effectively reduce the measurement error caused by the non-uniformity of the air-gap flux density in a MSSG, this paper proposes a novel compensation method based on measuring and modeling of the air-gap flux density. The angular velocity measurement principle and the structure of the MSSG are described, and then the characteristic of the air-gap flux density has been analyzed in detail. Next, to compensate the flux density distribution error and improve the measurement accuracy of the MSSG, a realtime compensation method based on the online measurement with hall probes is designed. The common issues caused by the non-uniformity of the air-gap flux density can be effectively resolved by the proposed method in high-precision magnetically suspended configurations. Comparative simulation results before and after compensation have verified the effectiveness and superiority of the proposed compensation method.

목차 (Table of Contents)

• 1. Introduction
• 2. Angular Velocity Measurement Principle of a MSSG
• 3. Analysis of Errors Caused by Flux Density Distribution Non-uniform
• 4. Compensation Based on the Flux Density Measuring in Real-time
• 5. Simulation Results
• 6. Conclusion
• References

참고문헌 (Reference)

1 B. C. Han, 62 : 7424-, 2015

2 A. Johan, 50 : 1-, 2014

3 P. L. Cui, 21 : 618-, 2016

4 Y. Ren, 61 : 1539-, 2014

5 J. C. Fang, 61 : 2003-, 2014

6 Y. Maruyama, 19 : 1261-, 2009

7 Y. Maruyama, 3 : 954-, 2009

8 T. Akiyama, 24 : 1059-, 2014

9 P. L. Cui, 2015 : 1-, 2015

10 S. Park, 10 : 618-, 2006

11 R. G. Thomas, 29 : 74-, 2009

12 T. M. Lim, 18 : 35-, 2008

13 T. M. Lim, 30 : 347-, 2006

14 J. Q. Tang, 58 : 509-, 2015

15 C. E. Wang, 2013 : 147-, 2013

16 B. Xiang, 28 : 46-, 2015

17 L. S. Stephens, 38 : 1764-, 2002

18 Xin Chaojun, "Modeling and Analysis of Drift Error in a MSSG with Double Spherical Envelope Surfaces" 한국자기학회 21 (21): 356-363, 2016