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针对星敏感器及其安装结构热变形等因素引起的星敏感器低频误差(LFE)影响卫星姿态确定精度的问题,提出了根据有效载荷提供的地标信息,采用最小二乘算法标定星敏感器低频误差的方法.考虑到卫星姿态确定系统是为有效载荷服务的,为了使卫星姿态确定系统输出的姿态信息与有效载荷相一致,从而准确反映有效载荷的指向变化情况,星敏感器低频误差的标定以有效载荷提供的地标信息为观测量进行.仿真结果表明,所提方法能够有效减弱星敏感器低频误差对卫星姿态确定精度的影响,从而提高卫星姿态确定精度.
According to the low frequency error (LFE) of star sensor caused by the star sensor and the thermal deformation of the installation structure, the accuracy of the satellite attitude determination is proposed. According to the landmark information provided by the payload, the least square algorithm is used to calibrate the low frequency Considering that the satellite attitude determination system serves the payload, in order to make the attitude information output by the satellite attitude determination system consistent with the payload, so as to accurately reflect the change of the orientation of the payload, the calibration of the low frequency error of the star sensor The landmark information provided by the payload is observed, and the simulation results show that the proposed method can effectively reduce the influence of the low-frequency error of the satellite sensor on the accuracy of the satellite attitude determination and thus improve the accuracy of satellite attitude determination.