一种快速高精度激光终端跟踪角度等效方法  

Fast and high precision laser terminal tracking angle equivalent method

作　　者：崔慧敏 郭宇龙 马纪军 关贵注 王宇宁 CUI Huimin;GUO Yulong;MA Jijun;GUAN Guizhu;WANG Yuning(Beijing Research Institute of Telemetry,Beijing 100076,China)

机构地区：[1]北京遥测技术研究所,北京100076

出　　处：《遥测遥控》2019年第6期44-49,共6页Journal of Telemetry,Tracking and Command

基　　金：国家自然科学基金(61903044)。

摘　　要：激光光束良好的跟踪特性是建立激光通信链路进而实现稳定高质量通信的前提,目前为实现高精度的激光光束跟踪指标,激光终端通常采用粗精组合切换跟踪控制的方法。但由于粗跟踪环中耦合有反射镜和多个库德镜,使得粗精环等效角度转换过程变得十分复杂。为解决该问题,提出从端到端进行坐标解算和从两端到参考坐标系进行光束变化角度转换的思路,进而实现精跟踪环快速跟踪反射镜x、y方向角度值对出射、入射光束变化,与等效的粗跟踪环U型架的方位、俯仰角度变化的转换关系。在详细描述两种方法转换思路的基础上,借助MATLAB工具计算转换结果,仿真结果表明相对于第一种方法计算量大,等效误差较大,有时甚至出现无法解出等效解的问题,第二种方法简便快速且计算误差较小,对于对实时性要求较高的激光通信跟瞄系统实现其快速高质量跟踪通信具有重要意义。The good tracking characteristic of laser beam is the prerequisite for establishing a laser communication link and achieving stable high-quality communication.At present,the laser terminal usually adopts a tracking control method of rough and fine loops combination switching.However,due to the coupling of the mirror and the multiple Godd mirrors in the coarse tracking loop,the equivalent conversion process of the coarse and fine ring input angle becomes very complicated.In order to solve the problem,the end-to-end coordinate solution and the beam angle equivalent transformation solution from the two ends to the reference coordinate system are proposed by using the quaternion method in the paper.Thus,it is easy to realize angle change conversion relationship between the angle value change of fast tracking mirror in x,y direction and the equivalent orientation change in coarse tracking ring of U-shaped frame.Based on the detailed description of the two conversion thoughts,this paper analyzes the results with the help of MATLAB tools.The simulation results show that compared with the end-to-end coordinate calculation method the second method is simpler,faster and the calculation error is smaller.For the laser communication tracking system with high real-time requirements,the second fast and high-precision coordinate solving method proposed in the paper is of great significance for achieving fast and high-quality tracking communication.

关 键 词：激光通信 高精度指向 二维伺服机构 粗精组合控制 

分 类 号：V556.7[航空宇航科学与技术—人机与环境工程]