提出一种太阳敏感器测量坐标系与立方镜坐标系转换矩阵的标定方法。该方法首先利用太阳模拟器和两轴转台对太阳敏感器测量坐标系与转台坐标系进行标定;然后,利用光阑接受屏和CCD图像瞄准定位系统,对立方镜坐标系和转台坐标系进行标定;最后,以转台坐标系作为中间坐标系计算出所述两坐标系的转换矩阵,从而将太阳敏感器测量的太阳视线方向间接转换到立方镜坐标系。实验结果表明,两坐标系转换矩阵的标定精度优于4″(1σ),满足太阳敏感器测量精度要求。该方法不需要精准的加工和安装工艺,同时对两坐标系转换矩阵的标定也不需要太阳敏感器测量坐标系与转台坐标系保持一致,易于实现,具有实用价值。

A method to calibrate the transform matrix between the sun sensor coordinate system and the cubic prism coordinate system was proposed.Firstly,the sun sensor coordinate system and a 2D rotator coordinate system were calibrated with a sun simulator and a high-accuracy 2D rotator.Then,the cubic prism coordinate system and the 2D rotator coordinate system were calibrated with a diaphragm screen and a CCD image-collimate system.Finally,the transform matrix between the sun sensor coordinate system and the cubic prism coordinate system was derived by taking the 2D rotator as a medial coordinate system.Thereby,the sun vector measured by the sun sensor was indirectly transferred to the cubic prism coordinate system.Experiment results show that the calibration precision is better than 4″(1σ) ,which can meet the requirement of sun sensor measurements.Proposed method can relax the demands for precise machining and installation,and the sun sensor and 2D rotator coordinate systems shouldn't be in coincidence when calibration.It shows that the method is easy to carry out and worth to use.