Infrared and Laser Engineering, Volume. 47, Issue 12, 1217006(2018)
On-orbit real time installation matrix calibration method for high accuracy star trackers
In flight, the installation matrix of star tracker changed with the orbital period affected by the space thermal environment. In order to calibrate the variation of the installation matrices between star trackers caused by the structural distortion of the satellite, a real time on-orbit installation matrix calibration method based on quaternion adaptive Kalman filter was proposed. The algorithm was based on the combination of fading memory filter and simplified Sage_Husa adaptive filter. The algorithm adjusted the weight of the current measurement by adjusting the fading factor adaptively, which could restrain the filter divergence caused by the inaccurate model parameters. The results of simulation experiments and on-board data verification show that the q-AKF algorithm not only could restrain the divergence problem caused by the inaccurate model parameters, but also could track the real values of the installation matrix stably, when the attitude maneuver rates ranged from 0 to 5 (°)/s. It is better in adaptability and robustness.
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Li Xinpeng, Sun Shaoyong, Zheng Xunjiang, Mao Xiaonan, Ye Zhilong, Sun Shuodong. On-orbit real time installation matrix calibration method for high accuracy star trackers[J]. Infrared and Laser Engineering, 2018, 47(12): 1217006
Category: 光电测量
Received: Jul. 10, 2018
Accepted: Aug. 28, 2018
Published Online: Jan. 10, 2019
The Author Email: Xinpeng Li (xinpengl@126.com)