高动态地面星图模拟检测系统算法研究  

Study on Algorithm of High Dynamic Ground Star Map Simulation Detection System

作　　者：李光茜 王凌云[1] 郑茹[1] 贾永丹[2] 张占鹏 Li Guangxi;WANG Lingyun;ZHENG Ru;JIA Yongdan;ZHANG Zhanpeng(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022;Beijing Institute of Space Mechanics & Electricity,Beijing 100094)

机构地区：[1]长春理工大学光电工程学院,长春130022 [2]北京空间机电研究所,北京100094

出　　处：《长春理工大学学报（自然科学版）》2019年第3期24-27,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省科技发展计划(20180201018GX)

摘　　要：星敏感器是一种高精度姿态测量装置,其通过探测天球上不同位置的恒星来确定载体姿态。为了在地面对星敏感器功能进行测试,设计了地面星图模拟检测系统软件,使星图模拟系统和星敏感器测试系统组成闭环测试,完成星敏感器准确定姿测试实验。地面星图模拟系统采用了58928颗星的SAO星表进行检索,按传统全天球恒星遍历方法星点检索和星图刷新时间共约为200ms,不满足星图刷新时间高于10Hz的指标要求。通过对整个星表进行物理分区的方法,把原星表按照经纬度分成了16个子区,每个子区恒星平均数量不到4000颗,软件根据光轴指向导入对应的子区,生成相应的星图,很大程度上减少了恒星遍历所需的时间。实验结果表明,星图模拟检测系统能够完成对星敏感器姿态功能测试,星表分区检索后,星图模拟刷新时间提高到40ms (即25Hz)以上,实现了星敏感器的高动态姿态测试功能。The Star sensor is a kind of high precision attitude measurement device, which determines the attitude of the carrier by detecting stars at different positions on the celestial sphere. In order to test the function of the star sensor on the ground,in this paper,the software of the ground star map simulation detection system was designed which made the star map simulation system and the star sensor test system form a closed-loop test;and the quasi-deterministic attitude test experiment of the star sensor was completed. The SAO catalog of 58928 stars was used in the ground star map simulation system for retrieval. According to the traditional global star traversal method,the total time of star point retrieval and map refresh was about 200 ms,which did not meet the index requirement that the star map refresh time was higher than 10 Hz. By means of physical partition of the entire star table,the original star table was divided into 16 sub-regions according to longitude and latitude. The average number of each sub-region was less than4000. The corresponding sub-regions was imported according to the optical axis and generated the corresponding star map in the software,which greatly reduced the time required for star traversal. Experimental results showed that the star map simulation detection system can complete the high dynamic test of the star sensor attitude. After the catalog partition retrieval,the refresh time of the star map simulation was increased to more than 40 ms(25 Hz),which realizes the high dynamic attitude test function of the star sensor.

关 键 词：星图模拟 星敏感器 星表分区 闭环检测 

分 类 号：V448.15[航空宇航科学与技术—飞行器设计]