Risley光栅跟瞄系统指向误差分析  

Analysis of pointing error of Risley grating tracking system

作　　者：董云冲 李小明 陈希来[1] 杨盛 付越 Dong Yunchong;Li Xiaoming;Chen Xiai;Yang Sheng;Fu Yue(School of Mechanical and Electrical Engineering,Changchun University of Science and Technology,Changchun,Jilin 130022,China;National and Local Joint Engineering Research Center of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun,Jilin 130022,China)

机构地区：[1]长春理工大学机电工程学院,吉林长春130022 [2]长春理工大学空间光电技术国家地方联合工程研究中心,吉林长春130022

出　　处：《光电工程》2025年第3期26-39,共14页Opto-Electronic Engineering

摘　　要：Risley光栅跟瞄系统主要由两片旋转的偏振光栅组成,光源经过偏振光栅衍射后实现在圆锥形范围内的光束指向,进而对目标进行捕获、跟踪。而指向精度作为Risley光栅跟瞄系统的重要指标,不仅受伺服与光学系统影响,还受Risley光栅跟瞄系统中双光栅转台的天线安装位置精度以及轴系装配误差等系统误差影响。为此,本文主要对Risley光栅跟瞄系统中的各系统误差源及其造成的指向误差进行分析,首先建立系统误差数理模型并利用ZEMAX对数理模型进行验证,随后利用MATLAB分析各系统误差源对Risley光栅跟瞄系统指向误差的影响,最后根据分析结果及指标要求对某双光栅跟瞄系统误差源进行误差分配,指导双光栅转台的设计、装调。对双光栅转台指向误差进行实验测试,经多次实验测试后得到双光栅转台实际最大指向误差δe=7.2″,满足双光栅转台指向误差设计指标10″。The Risley grating tracking system is mainly composed of two rotating polarization gratings.The light source is diffracted by the polarization grating to achieve beam pointing in the conical range,and then the target is captured and tracked.As an important index of the Risley grating tracking system,pointing accuracy is not only affected by servo and optical systems but also by system errors such as antenna installation accuracy and shafting assembly error of double grating turntable in the Risley grating tracking system.Therefore,this paper mainly analyzes the systematic error sources in the Risley grating tracking system and the pointing errors caused by them.First,a mathematical model of systematic error is established and verified by ZEMAX.Then,MATLAB is used to analyze the influence of each systematic error source on the pointing error of the Risley grating tracking system.Finally,according to the analysis results and index requirements,the error source of a double grating tracking system is assigned to guide the design and installation of the double grating turntable.The actual maximum pointing error of the double grating turntableδe=7.2"is obtained after several experimental tests,which satisfies the design index of pointing error of the double grating turntable 10".

关 键 词：Risley光栅 跟瞄系统 指向误差 误差分配 

分 类 号：TN929.1[电子电信—通信与信息系统]