Abstract

The geometrical error caused pointing error is an inevitable problem in space satellite laser communication terminals which can affect the pointing accuracy of the APT (acquisition pointing and tracking) system greatly, in order to facilitate the assembling of the APT system and improve the performance of the laser communication system, the geometrical error sensitivity about the APT pointing accuracy is analyzed based on multi-body kinematics method in this paper, the error transformation matrix is derived and the geometrical error is analyzed, the simulation results provide some pointing error distribution regulars which are conductive to assembling. Based on the above research, the geometrical error correction experiment is performed and the pointing accuracy of the APT system is tested, the expectation value of the pointing error can reach 29.9 µrad which is greatly improved. This research can provide technical references for the design and analysis of space laser communication terminals.

摘要

导致指向误差的几何误差是空间卫星激光通信终端中不可避免的问题，会极大地影响APT（获取指向和跟踪）系统的指向精度，以利于APT系统的组装和提高APT系统的性能。激光通信系统中，基于多体运动学方法分析了关于APT指向精度的几何误差敏感性，推导了误差变换矩阵并对几何误差进行了分析，仿真结果提供了一些指向误差分布规律。便于组装。在以上研究的基础上，进行了几何误差校正实验，测试了APT系统的指向精度，指向误差的期望值可以达到29。9 µrad，大大提高了。该研究可为空间激光通信终端的设计和分析提供技术参考。