基于激光PSD的空间载荷指向测量系统  

Space load pointing measurement system based on laser PSD

作　　者：方厚招 薛景赛 孙延博[1] 贾奥男 王润泽 王瑞 FANG Houzhao;XUE Jingsai;SUN Yanbo;JIA Aonan;WANG Runze;WANG Rui(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《航天器环境工程》2023年第2期179-183,共5页Spacecraft Environment Engineering

基　　金：国家重点研发计划项目(编号:2019YFA0708904)。

摘　　要：为满足卫星载荷指向高精度测量需求,设计基于激光位置敏感探测器(PSD)的空间载荷指向测量系统。主要原理是:将激光发射至反射器(安装于载荷)处,经反射器反射到PSD光敏面后,PSD感应激光形成光电流,再经过电流-电压变换处理后输出给高精度采集控制器,最后通过高精度采集控制器中的算法进行数据处理得到载荷指向的小角度变化。试验证明,该系统测量角度范围±0.15°,俯仰角和倾斜角测量精度优于0.002°,角度稳定性优于0.0004°(3.5 h)。该系统不仅可满足在轨因热变形等因素产生的载荷指向小角度转动测量要求,同时可满足地面测试中的小角度高精度测量需求。In order to meet the requirements of high precision measurement of satellite load pointing,a space load pointing measurement system was designed based on laser position sensitive detector(PSD).The principle was as follows:a laser beam was transmitted to the reflector installed on the load,and then it was reflected to the photosensitive surface of the PSD;a photocurrent was generated by the PSD sensing laser light;after current to voltage conversion,the signal was outputted to a high-precision acquisition controller,in which data was processed using algorithm to obtain the small angle change of the load pointing.The test results show that the measurement angle range of the system is±0.15°;the measurement accuracy of pitch and tilt angles is within 0.002°;and the measured angle stability is better than 0.0004°within 3.5 hours.The system may not only meet the requirements of small angle rotation measurement of load pointing caused by thermal deformation and other factors in orbit,but also meet the requirements for small angle and high precision measurement in ground testing.

关 键 词：载荷指向 位置敏感探测器 小角度测量 高精度 高稳定性 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] TH822[自动化与计算机技术—控制科学与工程]