A Full-Frequency Angular Rate Measurement Method of Spacecraft Based on Multi-MSCSG Weight Assignment

Abstract

In order to realize the full-frequency angular rate measurement of spacecraft based on Magnetically Suspended Control and Sensing Gyroscope (MSCSG), a full-frequency angular rate measurement method of spacecraft based on multi-MSCSG weight assignment is proposed in this paper. Firstly, the main structure of MSCSG is introduced. The traditional angular rate sensing principle of MSCSG is analyzed on the basis of the working principle of Lorentz magnetic bearing, the key component of MSCSG; After introducing and analyzing the shortcomings of the two existing measurement methods, namely, four-cross configuration and virtual gyro technology, the weight function of frequency is obtained by deriving the measurement accuracy model of the two methods. The weight assignment measurement method is proposed to achieve the fusion of the advantages of the two methods and achieve high-precision angular rate measurement of spacecraft in the full- frequency band. Through simulation and semi physical experiments, we verified that the angular rate accuracy of spacecraft measured by the proposed one can be maintained above 98% at different frequencies, and the higher the frequency is, the higher the angular rate measurement accuracy of spacecraft is.