基于非支配排序遗传算法Ⅱ智能搜参的精跟踪系统  

Precision Tracking System Based on Non-dominated Sorting Genetic Algorithm II Intelligent Parameter Search

作　　者：王旭 张亮[1,2] 涂成翔 王婷婷 王建宇 WANG Xu;ZHANG Liang;TU Chengxiang;WANG Tingting;WANG Jianyu(Key Laboratory of Space Active Opto-electronics Technology,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China;Shanghai Quantum Science Research Center,Shanghai 201315,China)

机构地区：[1]中国科学院上海技术物理研究所空间主动光电技术重点实验室,上海200083 [2]中国科学院大学,北京100049 [3]上海科技大学信息科学与技术学院,上海201315 [4]上海量子科学研究中心,上海201315

出　　处：《光子学报》2022年第9期156-168,共13页Acta Photonica Sinica

基　　金：国家重点研发计划(No.2020YFB2205900);上海启明星计划(No.19QA1410400);中国科学院青年创新促进会;上海市科技重大专项(No.2019SZZDZX01);上海市“基础研究特区计划”(No.JCYJ⁃SHFY⁃2021⁃04)。

摘　　要：针对空间光通信中精跟踪系统的精度易受外界干扰影响的问题,在典型光通信终端的传统精跟踪系统的基础上,提出了附加集成模块的设计方法,并采用非支配排序遗传算法II得到全局最优控制器参数,实现了一个精跟踪系统智能搜参方法。基于某典型光通信卫星终端在轨实测的角干扰数据,仿真对比结果表明,在保持闭环系统稳定性的基础上,可以提升33.7%的误差抑制带宽,提高全频段的干扰抑制能力约19.5%,其中10 Hz以内的干扰误差抑制性能提升幅度高达95%以上。搭建了实物验证系统,实测结果表明,该系统的跟踪精度和干扰抑制性能相比传统系统大幅度提升,其中10 Hz以内的提升幅度超过20倍。该精跟踪系统的实验结果与仿真结果具有较好的吻合度,对未来空间光通信领域的发展有重要意义。Because the signal light is very weak and the communication link is easily interfered,space optical communication and space quantum communication require extremely high precision for the tracking system of the terminal payload.The accuracy of the fine tracking subsystem determines the tracking accuracy of the entire terminal system.Therefore,in the fine tracking stage,the system must meet the requirements of high precision and large bandwidth.However,the accuracy of traditional fine tracking systems is easily affected by external disturbances.To achieve higher tracking accuracy and stronger interference suppression capability,based on the traditional precise tracking system of typical optical communication terminals,a design method of an additional integrated module is proposed,and this module is cascaded after the PID controller of the traditional control system.Based on performance indicators such as control bandwidth,interference suppression capability,and stability,the non-dominated sorting genetic algorithm II is used to obtain the global optimal controller parameters,and a precise tracking system with intelligent parameter search is realized,which can achieve the tracking accuracy of sub-micro radian scale.Based on the measured angular interference data of a typical optical communication satellite terminal in orbit,the simulation compares the new system and the traditional system.The results show that on the basis of maintaining the stability of the closed-loop system,the new system can increase the error suppression bandwidth by 33.7%and improve the interference suppression ability of the full frequency band by 19.5%,of which the interference error suppression performance within 10 Hz is improved by more than 95%.For the four frequency bands of 0~1 Hz,1~10 Hz,10~50 Hz,and 50~100 Hz,the accuracy of the new system is improved by 99.5%,95.7%,71.3%,and 29.9%respectively compared with the traditional system.A physical verification system is built in the laboratory environment,and it is verified that the trackin

关 键 词：空间光通信 精跟踪系统 非支配排序遗传算法II 跟踪精度 干扰抑制性能 智能搜参 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]