基于半刚性连接的提高星敏感器指向精度的安装设计  

An installation design of improving pointing accuracy of star sensor based on semi-rigid connection

作　　者：朱华 张春雨[1] 周徐斌[1] 张宗华[1] 顾志悦 吕凯[1] 

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《中国空间科学技术》2016年第2期66-73,共8页Chinese Space Science and Technology

基　　金：国家自然科学基金(51505294)

摘　　要：研究和分析了热变形引起的星敏感器和合成孔径雷达(SAR)天线的形变特点,设计了一种SAR天线与星体结构之间的安装方法,并以某卫星为例,将两者半刚性连接(横向游离),其安装设计方法在于将SAR天线框架与星体间的螺钉连接横向刚度减小,使星体的热变形与SAR天线产生了横向游离效果。计算分析和试验表明,这种安装设计方法有效地提高了星敏感器相对于SAR天线中板阵面的指向精度,可以满足高分辨率卫星成像的需求,为其他有较高指向精度要求的单机安装提供参考。Satellite performance in orbit is impacted by pointing accuracy of star sensor and synthetic aperture radar（SAR）middle plate because of thermal deformation.Characteristics about thermal deformation of star sensor and SAR were studied and analysed,and installation between SAR and satellite body was designed.Taking one satellite as an example,SAR and satellite body were connected with a semi-rigid（horizontal constraint released）method,and the influence of satellite thermal deformation was isolated to SAR with a certain rigidity.As a result,pointing accuracy of star sensor relative SAR middle plate increased,and met the requirement of satellite imaging.This is verified by calculation analysis and test,and can provide reference for other aerospace electronc equipments.

关 键 词：星敏感器 指向精度 半刚性连接 计算分析 热变形试验 

分 类 号：V416.1[航空宇航科学与技术—航空宇航推进理论与工程]