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Research on the Algorithm of On-Orbit Calibration Based on Gyro/Star-Sensor

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3 Author(s)
Peng Wang ; Research Center of Satellite Technology, Harbin Institute of Technology, Harbin 150080, China. E-MAIL: ; Ying-chun Zhang ; Wen-yi Qiang

In order to control satellites maneuver accurately from one attitude to another, onboard rate sensing gyro usually need be calibrated again after launch. A new on-orbit calibration algorithm is proposed to correct the drift errors of the gyro based on Star-Sensor in this paper. Firstly, the exact dynamic and kinematic models of the gyro are built by error analysis. Then the error model is linearized under reasonable condition, and the state equation of system is educed in detail. The information of attitude Modified Rodrigues Parameters measured by Star-Sensor in real time is used to calibrate the installation error and the calibration error based on the extended Kalman filter. The numerical simulation results show that the new method is effective practically to improve the navigation precision, longevity of gyro effectively and to provide better reliability and adaptability

Published in:

2006 International Conference on Machine Learning and Cybernetics

Date of Conference:

13-16 Aug. 2006