交会对接光学成像敏感器反射镜组件微应力装配技术  

Micro-Stress Assembling Technique for a Metal Reflector Module of Camera-Type Rendezvous and Docking Sensor

作　　者：张慧锋 龚德铸[1] 张佳星 孙建波[1] ZHANG Huifeng;GONG Dezhu;ZHANG Jiaxing;SUN Jianbo(Beijing Institute of Control Engineering,Beijing 100190,China)

机构地区：[1]北京控制工程研究所

出　　处：《空间控制技术与应用》2019年第6期60-64,72,共6页Aerospace Control and Application

基　　金：中国航天科技集团公司重大工艺专项基金资助项目(ZDGY2016_07)~~

摘　　要：为了实现交会对接光学成像敏感器的功能、性能,其金属反射镜组件对面形精度和指向精度要求较高.金属反射镜组件在加工和装配过程中会产生装配应力,导致反射镜的面形和指向精度发生变化.在改进装调流程的基础上,首先通过仿真分析确定了反射镜安装螺钉的拧紧力矩;其次,优化了反射镜支架和反射镜安装面的平面度公差,从0.008 mm提高到0.002 mm;选用柔性材料制作过定位尺寸链的零件,对比了改进前后的反射镜指向变化和装配应力,改进后大幅减小,保证了反射镜精度指标要求.反射镜组件在装配到整机后面形和指向精度变化较小,反射镜面形达到PV≤0.2λ,RMS≤0.06λ(原方法数据PV≤0.8λ,RMS≤0.13λ),反射镜力学和热学环境实验前后反射镜指向变化由≤2′,提高到≤1′,保证了敏感器的测量精度.In order to realize the functionality and performance of camera-type rendezvous and docking sensor(CRDS),high form and pointing accuracy of metal reflector module are requested.Assembly stress emerges in manufacture and assembly process,which causes form and pointing accuracy change.First,based on manufacturing and assembly process optimization,tightening torque of the reflector is ensured by simulation analysis.Second,flatness of mounting surface is optimized from 0.008 mm to 0.002 mm.Last,flexible material is used on over-positioning dimension chain,pointing variation and assembly stress are drastically reduced,which ensures pointing accuracy of the metal reflector.Through these measures,after metal reflector module assembled to CRDS,form accuracy realizes PV≤0.2λ,RMS≤0.06λand reflector surface vector varies from≤2′to≤1′after mechanics and thermal environment test,which guarantees the measurement accuracy of CRDS.

关 键 词：金属反射镜组件 面形和指向精度 拧紧力矩 平面度 装配应力 过定位 

分 类 号：V465[航空宇航科学与技术—航空宇航制造工程] TH162[机械工程—机械制造及自动化]