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针对目前星敏感器安装误差标定过程中存在的标定模型复杂标定测试流程繁琐等问题,提出了一种星敏感器安装误差的三位置法地面标定方法。该方法根据坐标系的欧拉变换,构建了星敏感器安装误差的数学模型;根据误差模型,提出了基于三轴精密转台的安装误差三位置法地面标定策略。采用最小二乘法和三位置法进行仿真对比实验,结果表明,安装误差的三位置法标定结果比最小二乘法标定结果的稳定性提高了近10倍。三位置法还具有标定测试流程简单等优点,对提高星敏感器的使用精度具有重要参考价值。
Aiming at the problems of cumbersome procedure of complex calibration test of calibration model existing in star sensor installation error calibration, a three-position ground calibration method of star sensor installation error is proposed. According to the Euler transformation of coordinate system, the method builds a mathematical model of the installation error of star sensor. According to the error model, a three-position ground calibration method based on three-axis precision turntable is proposed. The least square method and three-position method were used to simulate and compare experiments. The results show that the calibration results of the three-position method of installation error are nearly ten times more stable than the least squares method. The three-position method also has the advantages of simple calibration test procedure and so on, which has an important reference value for improving the using precision of the star sensor.