摘要
对卫星激光通信跟踪系统的组成以及控制方式进行分析,总结精跟踪控制过程中时滞来源,对精跟踪系统时滞环节对最终跟踪精度以及稳定性的影响进行分析并通过系统优化提高精跟踪精度。在不损失系统功能的基础上通过优化程序处理逻辑精简精跟踪系统中的时滞环节,消除变长时滞、减少定长时滞,实现精跟踪系统时滞缩短,在此基础上提出一种鲁棒预估控制算法,减少定长时滞对精跟踪系统带来的不利影响。结果表明,精简时滞环节后精跟踪系统的跟踪误差与原来相比从4.1μrad减少到2.3μrad,采用鲁棒预估控制算法后,在匹配延时存在误差的情况下,跟踪误差从4.1μrad减少到2.6μrad,系统跟踪精度分别提升43.9%和36.6%。在精跟踪系统中采用鲁棒预估控制算法进行试验,精跟踪的跟踪精度可达1.9μrad。
The composition and control mode of space optical communication and tracking systems are analyzed,and the source of time lag in the fine tracking control process is summarized.Furthermore,the influence of the time lag link of a fine tracking system on the final tracking accuracy and stability is analyzed,and the precision of fine tracking is improved via system optimization.Initially,the time lag of the fine tracking system is streamlined by optimizing the program processing logic without losing the system function.This in turn eliminates the variable-length time lag and reduces the fixed-length time lag to shorten the time lag of the fine tracking system.Based on this,a robust prognostic control algorithm is proposed to reduce the adverse effect of the fixed-length time lag on the fine tracking system.The final results show that the tracking error of the fine tracking system is reduced from 4.1μrad to 2.3μrad after streamlining the time lag link when compared with the original system,and the tracking error is reduced from 4.1μrad to 2.6μrad after using the robust prediction control algorithm in the presence of the matching delay error.Additionally,the tracking accuracy of the system is improved by 43.9%and 36.6%,respectively.The tracking accuracy of fine tracking is as high as 1.9μrad when the robust prognostic control algorithm is tested in the fine tracking system.
作者
陈阳
赵子达
张书哲
陈奕辛
俞达
于思源
Chen Yang;Zhao Zida;Zhang Shuzhe;Chen Yixin;Yu Da;Yu Siyuan(School of Instrumention Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;Beijing Institute of Astronautical Systems Engineering,Beijing 100072,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2024年第7期119-124,共6页
Laser & Optoelectronics Progress
关键词
卫星激光通信
精跟踪系统
时滞补偿
预估控制
satellite laser communications
fine tracking system
time delay compensation
estimation control
