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星敏感器是一种精度达到角秒级的空间姿态测量装置,它的成像组件包括光学镜头和图像传感器(以CMOS APS为主流)。本文主要关注星敏感器APS的装配,从理论上推导了APS的空间位姿参量对计算观测矢量的影响,从而提出了一种在装配过程中控制及标定这些参量的方法并研制了相应的实物系统。测试数据表明,该系统对倾斜的两个分量的标定重复性误差分别为±1.05″和±1.09″,对滚转的标定重复性误差为±9.4″,对偏心的两个分量的标定重复性误差分别为±0.53μm和±0.55μm。
The star sensor is a space-attitude measuring device with an accuracy of an order of magnitude. The imaging components of the star sensor include an optical lens and an image sensor (mainly CMOS APS). In this paper, we focus on the assembly of star sensor APS, and theoretically deduce the influence of the space attitude and attitude parameters of APS on the calculation of the observed vector. Therefore, a method of controlling and calibrating these parameters in the assembly process is proposed and the corresponding physical objects system. The test data shows that the calibration repeatability errors of the two components of the system are ± 1.05 “and ± 1.09”, respectively, and the repeatability of the calibration error is ± 9.4 ". The calibration repeatability of the two components of eccentricity The errors are ± 0.53 μm and ± 0.55 μm, respectively.