量子光通信中位置修正单检测控制方法  

Research on control technology of single detection based on position correction in quantum optical communication

作　　者：李志俊[1,2,3] 毛耀 亓波[1,2] 周翕[1,2] 刘琼 周倩[1,2,3] Li Zhijun;Mao Yao;Qi Bo;Zhou Xi;Liu Qiong;Zhou Qian(Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;Key Laboratory Optical Engineering,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光电技术研究所,四川成都610209 [2]中国科学院光束控制重点实验室,四川成都610209 [3]中国科学院大学,北京100049

出　　处：《光电工程》2022年第3期20-34,共15页Opto-Electronic Engineering

基　　金：国家自然科学基金青年科学基金资助项目(61905253)。

摘　　要：量子通信光学地面站光学系统中,采用精、高精跟踪两个快速控制反射镜组成单检测模式闭环。为保证系统控制精度和稳定性,控制过程中必须考虑解耦。然而在目标信噪比较低情况下,难以实现精、高精跟踪回路的准确解耦。本文提出在精跟踪、高精跟踪内部增加位置传感器,一方面采用位置传感器闭环提高内环控制对象确定性,便于参数整定,另一方面,位置传感器偏差量反映了电视脱靶量的偏差,精跟踪采用修正位置传感器偏差量进行闭环从而避免了系统解耦。本文分析了基于该方法实现的复合轴控制结构的对象特性,控制系统设计方法及鲁棒性。理论和实验结果表明:目标特性较差的情况下,特别是滞后变化较大的情况下,本文提出的方法不需要进行解耦控制,具有更好的鲁棒性、更高的精度。In the optical system of quantum communication optical ground station,two fast control mirrors,corresponding to precision and high-precision tracking,are used to form a single detection mode closed loop.In order to ensure the control accuracy and stability of the system,decoupling must be considered in the control process.However,when the SNR of the target is low,it is difficult to realize the accurate decoupling of precision and high-precision tracking loops.This paper proposes to add a position sensor in precision and high-precision tracking loops,respectively.On the one hand,the position sensor closed-loop is used to improve the certainty of the inner loop control object and facilitate parameter setting.On the other hand,the deviation of the position sensor reflects the deviation of the TV miss distance.The fine tracking adopts the correction of the deviation of the position sensor for closed-loop,so as to avoid system decoupling.This paper analyzes the object characteristics,control system design method,and robustness of the compound axis control structure based on this method.Theoretical and experimental results show that the proposed method has better robustness and higher accuracy without decoupling control when the target characteristics are poor,especially when the delay changes greatly.

关 键 词：单检测 位置修正 解耦 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]