卫星星间激光通信粗跟踪转台控制系统  

Control system for coarse tracking turntable of laser communication between satellites

作　　者：王文杰[1,2,3] 徐伟 朴永杰[1,3] 冯汝鹏[1,3] 周美丽[1,3] WANG Wen-jie;XU Wei;PIAO Yong-jie;FENG Ru-peng;ZHOU Mei-li(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Space-based Dynamic&Rapid Optical Imaging Technology,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049 [3]中国科学院天基动态快速光学成像技术重点实验室,吉林长春130033

出　　处：《光学精密工程》2021年第12期2797-2805,共9页Optics and Precision Engineering

基　　金：钱学森空间技术实验室创新工作站开放基金资助项目(No.GZZKFJJ2020003)。

摘　　要：为了满足卫星星间激光通信粗跟踪系统高的动态性能和稳态性能,针对普通PID控制存在阶跃响应超调量大、调节时间过长等问题,以永磁同步电动机为控制对象建立粗跟踪系统的三环控制模型,并进行matlab仿真分析。在普通PI控制的基础上提出一种自适应增益控制,为跟踪系统缩短调节时间改善超调等动态性能提供新的方法,在基于FPGA主控单元的控制下。地面实验表明,在187.25μrad(500码)阶跃信号的激励下,改进的自适应增益控制策略较普通PI控制,超调量由35.8%下降到10%,调节时间由100 ms缩短到70 ms,稳态精度保持在±2.247μrad(3码),控制性能得到了显著改善。在轨工况下,自适应增益控制策略能够实现星间激光通信跟踪转台的高精度控制,同时对其他高精度伺服系统设计具有借鉴意义。With regard to meeting the highly dynamic and steady-state performance of the coarse tracking system used for laser communication in a satellite,under the action of the step signal,the ordinary PID control has drawbacks such as large step response overshoot and long adjustment time to fulfill the engi⁃neering requirements.This study uses permanent magnet synchronous motor(PMSM)as the control ob⁃ject to establish a three-loop control model of the coarse tracking system and performs MATLAB simula⁃tion analysis.An adaptive gain control is proposed on the basis of ordinary PI control,and theoretical proof and simulation are executed.It provides a new method for the tracking system to shorten the adjustment time and reduce the overshoot.The tracking system is controlled by the FPGA main control unit.In the ground test,under the excitation of a 187.25μrad(500 yard)step signal,the improved adaptive gain control strategy is better than ordinary PI control,the overshoot is reduced from 35.8%to 10%,and the adjustment time of the system is shortened from 100 ms to 70 ms.The state accuracy is maintained at 2.247μrad(±3 yards),and the control performance is significantly improved.Under orbital conditions,the adaptive gain control strategy shows good control performance,meeting the high precision require⁃ments of the tracking turntable used for inter-satellite laser communication,and it has reference signifi⁃cance for the design of other high-precision servo systems.

关 键 词：伺服控制 跟踪转台 永磁同步电机 自适应增益 控制性能 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]