甚高精度星模拟器星图显示与控制系统研究

摘要

为对甚高精度星敏感器进行地面标定和精度测试,提出甚高精度星模拟器的研制,其模拟精度应优于0.5″.在甚高精度星模拟器设计中,对星模拟器的星图显示与控制系统进行了重点研究.根据模拟精度要求,提出利用星点板作为星图显示器件.采用单点可控矩阵式LED照明系统作为星点板光源,完成小天区静态形式的动态星图模拟.通过设计星图显示控制系统,编写控制软件,实现每个LED的亮灭和灰度值控制,完成了星图变换和星等模拟.实验结果表明,星图显示精度小于0.5″,可以实现动态变换以及星等模拟,以满足对甚高精度星敏感器的地面标定和精度测试要求.%In order to conduct ground calibration and accuracy testing for very high accuracy star sensor,a very high accuracy star simulator is put forward,which simulation accuracy is better than 0.5″.Star map display and control system is the key component of the star simulator.According to the requirement of simulation accuracy,the star plate is proposed to be used as a map display device.By using a luminescence apiece controllable LED array as the target illumination system,the very high accuracy star map is simulated successfully.At the same time,the software is developed to control each LED light out/on and its gray value,which has completed the transformation for star map and magnitude simulation.Experimental results show that the map display can reach a precision less than 0.5″,and can realize dynamical change and magnitude simulation,which has been able to meet the requirement of very high accuracy of star sensor ground calibration and accuracy testing.