一种基于自适应滤波的高动态星敏感器在轨校正方法  

An On-orbit Correction Method for High Dynamic APS Star Tracker Based on Adaptive Filtering

作　　者：侯娅贤 赵汝进[1,2,3] 马跃博 何隆东 朱自发 HOU Yaxian;ZHAO Rujin;MA Yuebo;HE Longdong;ZHU Zifa(Institute of Optics and Electronics of Chinese Academy of Sciences,Chengdu 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement,Chinese Academy of Sciences,Chengdu 610209,China)

机构地区：[1]中国科学院光电技术研究所,成都610209 [2]中国科学院大学,北京100049 [3]中国科学院空间光电精密测量技术重点实验室,成都610209

出　　处：《光子学报》2021年第2期155-165,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61501429);中国科学院青年创新促进会资助项目(No.2016335)。

摘　　要：为了提高高动态环境下星敏感器的质心提取精度,提出了一种基于自适应滤波的在轨校正方法。该方法能够适应角速度变化的星敏感器,自适应的调整校正矩阵。使用提出的基于时空相关性的噪声估计滤波器跟随星点窗口实时更新校正矩阵,对星点准确校正。与传统地面校正方法相比,本文方法不仅减少了成本,且实时更新校正矩阵,校正更加可靠。通过实验验证了所提算法在高动态下对星敏感器校正的有效性,与现有只能低速星敏感器(≤0.1°/s)的在轨校正方法相比,本文方法能适应更大范围的角速度(0~3°/s),准确的校正高动态星敏感器,提高质心提取精度,对提高星敏感器的动态性能具有指导意义。In order to improve the accuracy of star centroid extraction of high dynamic star sensor,an onorbit correction method based on adaptive filtering was proposed,which can adaptively adjust the correction matrix at different angular velocities.Correction matrix is updated in real time by the noise estimation filter which is proposed based on temporal-spatial correlation.And the star point can be corrected in real time.Compared with the traditional method which correct on the ground,it not only reduces the cost,but also updates the correction matrix in real time,so the correction is more reliable.Experimental results show that the proposed method is effective in correcting star sensor under high dynamic conditions.Compared with the existing on orbit correction methods which can only appicable to low-speed star tracker(≤0.1°/s),the proposed method can adapt to the angular velocity of 0~3°/s,accurately correct the high dynamic star sensor,and successfully improve the accuracy of star centroid,which is of great significance to improve the dynamic performance of star sensor.

关 键 词：星敏感器 有源像素传感器 背景噪声 质心提取 高动态 

分 类 号：V249.31[航空宇航科学与技术—飞行器设计]