激光参考相机视轴监视方法与验证  

Method and Experiment for Boresight Monitoring of Laser Reference Cameras

作　　者：宗云花[1] 王伟之[1] 任宇宁 王庆雷[1] 王妍[1] 高卫军[1] Zong Yunhua;Wang Weizhi;Ren Yuning;Wang Qinglei;Wang Yan;Gao Weijun(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《光学学报》2021年第15期143-148,共6页Acta Optica Sinica

基　　金：民用航天“十三五”第三批预先研究项目(D040105)。

摘　　要：利用多波束激光进行航天地形测绘是当前的研究热点之一,激光指向确定是其中的核心环节,一般采用激光参考相机(LRC)记录,LRC的视轴监视功能和性能是确保激光指向确定精度的关键。首先,提出一种基于高稳定中央棱镜的LRC视轴监视测量方法,并给出了计算算法。其次,搭建实验验证系统,利用Hexpod转台和光电自准直仪对算法正确性进行了校验,结果表明,所提算法得到的测量结果与光电自准直仪结果一致,误差小于0.2″。进一步地,测量得到LRC视轴绕X轴和Y轴的热漂移分别达到0.3″和1.4″。最后,评估了不同环境下的视轴监视精度,结果表明,在真空环境下,视轴监视精度达到0.02″(1倍标准偏差),满足LRC视轴在轨监视的实际应用要求;相比于真空条件,大气隔振条件下的误差扩大了2~4倍,大气非隔振条件下的误差扩大了10~15倍。Multi-beam laser is one of the hot topics in aerospace topographic mapping, where the core is the determination of laser pointing. Laser reference cameras(LRCs) are usually used for recording, and the boresight monitoring function and performance of LRCs are the key to ensuring the accuracy of laser pointing determination. Firstly, a method based on a high-stability central prism is proposed to monitor and measure the LRC boresight, and the calculation algorithm is given. Second, an experimental verification system is built, and the correctness of the algorithm is verified with a Hexpod turntable and a photoelectric auto-collimator. The results show that the measurement results obtained by the proposed algorithm are consistent with those obtained by the photoelectric auto-collimator, with the error of less than 0.2″. Furthermore, the thermal drift of the LRC boresight is measured, and it reaches 0.3″ and 1.4″ around the X axis and Y axis, respectively. Finally, the monitoring accuracies of the boresight in different environments are evaluated. The results show that the monitoring accuracy in vacuum environment is 0.02″(one times standard deviation), which meets the practical application requirements of the on-orbit monitoring of the LRC boresight. Compared with the vacuum condition, the error increases 2--4 times under the atmospheric vibration isolation condition and 10--15 times under the non-vibration isolation condition, respectively.

关 键 词：测量 空间测量 激光参考相机 视轴监视 激光光斑质心 

分 类 号：V416.8[航空宇航科学与技术—航空宇航推进理论与工程]