静态星模拟器设计与精度分析

为了实现对星敏感器进行的地面标定和精度测试,研制高精度静态星模拟器,要求模拟器的星间角距精度优于10″。利用激光直写技术制作星点分划板,将其作为核心显示器件来模拟星图,设计准直光学系统实现无穷远距离和角度模拟,并通过优化像差保证模拟星点的成像质量。同时,提出星点位置修正方法以改善由于焦距测不准和光学系统相差带来的星图模拟误差。实验结果表明:经过修正的星图,单星位置模拟精度优于10″,可以作为地面标定与测试装置,供星敏感器进行观测。

Design of Static Star Simulator and Accuracy Analysis

In order to realize the ground of star sensor calibration and test accuracy, developing high precision static star simulator,required the star angular distance between the precision of simulator is better than 10". Star reticle,us-ing laser direct writing technique to simulate the map as a core display device, design of collimation optical system to realize simulate infinite distance and angle,and through the optimization of aberration guarantee simulation object in im-age quality. At the same time,the star position correction method is proposed to improve the focal length of uncertain-ty and the optical system are map simulation error. The experimental results show that the revised chart, single loca-tion simulation precision is better than 10", can be used as a calibration and test equipment on the ground, for star sensor.