为了提供高精度星敏感器姿态测量精度, 对三轴定姿受恒星自行影响产生误差的机理进行研究, 将恒星自行量分成Ⅰ -Ⅸ级存储在导航星库中, 并深入分析不同恒星自行量级在 20年间对三轴姿态角输出的逐年变化情况。仿真实验结果表明: 利用 QUEST方法在 20年内对三轴姿态角进行校正后精度可提高 75″以上, 在星等相近时优先选取自行量级较小的恒星进行姿态解算, 使新条件数达到最小, 大大提高工程上星敏感器姿态测量的精度和稳定性的要求。

To provide higher measure precision of the star sensor attitude, the principles of error that appears because the three Euler angles are influenced by proper motion are studied in this paper. The proper motion level is divided into Ⅰto Ⅸ and stored in the guide star catalogue and the yearly variation of different star proper promotion in the last 20 years according to the output of three Euler angles is analyzed in depth. The simulation experiment results show that the precision can increase over 75″after adjusting the three Euler angles in the last 20 years by QUEST method. The new condition number can be minimized by choosing the star with relatively lower proper motion level to perform the calculation of the attitude when the magnitude of the stars is similar. This can improve the precision and stabilization of the star sensor attitude measurement greatly in the engineering.