星敏感器定位精度噪声影响因素研究  

Study of Factors that Restrict the Position Accuracy Noises of Star Sensor

作　　者：李学夔[1] 谭海曙[1] 于昕梅[1] 郝志航[2] 

机构地区：[1]佛山科学技术学院机电学院,广东佛山528000 [2]中科院长春光机所,长春130022

出　　处：《光电子技术》2010年第2期97-101,共5页Optoelectronic Technology

基　　金：广东高校优秀青年创新人才培育项目(LYM08100)

摘　　要：基于矩心算法建立了星敏感器定位精度模型,从理论上分析了星敏感器定位精度的主要影响因素,推导出温度、积分时间和开窗大是影响星敏感器定位精度的主要因素,利用所研制的ST-1型星敏感器,通过实验定量地测试出了不同的温度、积分时间和开窗所带来的定位精度误差,并选择实验所得到的参数,通过ST-1型星敏感器进行野外实测,实测结果证明合适的温度、积分时间和开窗大小是获得高质量定位精度的前提。A mathematical model of the position accuracy is built based on centroid arithmetic. The factors that restrict the position accuracy of star sensor are analyzed. The result shows that the size of the window, integral time and temperature are important factors that restrict the position accuracy of star sensor. The error of the position accuracy caused by those factors is tested by ST-1 star sensor. The result shows that the integral time, temperature and the size of window that fit the star sensor are the premise of the high position accuracy.

关 键 词：星敏感器 定位 精度 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]