星敏感器APS装配标定系统

Assembly and Calibration System for APS of Star Sensor

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。

Star sensor is a kind of space attitude measurement device whose accuracy reaches arc-second degree, and its imaging module consists of optical lens and image sensor which mainly refers to CMOS APS. The assembly of APS of star sensor is focused, and the influence of spatial position and attitude parameters of APS on the calculation of observation vector is derived theoretically. Thus, a method to control and calibrate these parameters during the process of assembly is proposed, and a corresponding physical system is developed. Test data shows that using this system, the calibration repeatability errors of two components of tilt are ±1.05″ and ±1.09″, respectively, the calibration repeatability error of roll is ±9.4″, and the calibration repeatability errors of two components of eccentricity are ±0.53 μm and ±0.55 μm, respectively.