星敏感器参数分析与自主校正  

Star tracker parametric analysis for autonomous calibration

作　　者：邢飞[1] 董瑛[1] 武延鹏[1] 尤政[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第11期1484-1488,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究项目(TG2000077606)

摘　　要：星敏感器焦距和主光轴偏心等参数对整个系统产生较大的影响。该文定量地分析了星敏感器星点坐标处理精度、主光轴位置和焦距误差对星图识别的影响,利用观星实验设计了一种自主进行参数校正的方法并给出了设计原则。对APS CM O S星敏感器进行了参数校正,并利用校正后的参数进行观星实验,星图识别成功率达到100%。理论分析和实验结果表明,该方法可用于星敏感器的系统设计和参数的自主校正。Star tracker parameters such as the focus and principal offset greatly affect the system accuracy. This paper quantitatively analyzes the effects of the star image processing accuracy, the lens principal offset, and the focal length error on star pattern identification （Star-ID）. An autonomous parametric calibration method was then developed based on night-sky observation experiments. The APS CMOS star tracker parameters were calibrated using the method after which a night-sky observation experiment using the calibrated parameters showed that the star pattern identification success rate reached 100%. The theoretical and experimental results indicate that the method can be applied to star tracker system design and autonomous parameter calibration.

关 键 词：焦距 偏心 星图识别 自主校正 

分 类 号：TN433[电子电信—微电子学与固体电子学] V4[航空宇航科学技术]