Thermal deformation control and analysis of large temperature difference interface of high precision remote sensing camera
余成锋 1张永智 1付碧红 1陈有梅 1吉彦超 1黄劲 1梁记源1
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作者信息
1. 中国科学院微小卫星创新研究院,上海 201304
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摘要
针对可持续发展科学卫星1号(SDGSAT-1)装载的微光多谱段相机安装面存在热变形,进而影响微光多谱段相机成像质量的问题,对微光多谱段相机的安装方式进行结构和隔热的优化设计,并对卫星在低温、高温工况下的温度场分布和热变形进行仿真分析.结果表明:微光多谱段相机安装面在低温工况下的最大畸变为0.044 mm,在高温工况下的最大畸变为0.034 mm.控制安装界面的热变形量,并经地面试验和在轨验证,得到微光多谱段相机的在轨动态调制传递函数(modulation transfer function,MTF)≥0.1,满足要求.
Abstract
Aiming at the problem of thermal deformation on the installation surface of multispectral imager for inshore(MII)mounted on the first Sustainable Development Goals Satellite(SDGSAT-1),which affects the imaging quality of the MII,the structure and thermal optimization design of the installation of the MII are carried out.On this basis,the temperature distribution and thermal deformation of the satellite under two extreme conditions of high temperature and low temperature are simulated and analyzed.The results show that the maximum distortion of the installation surface of the MII is 0.044 mm at low temperature and 0.034 mm at high temperature.By controlling the thermal deformation of the installation interface,through ground testing and on-orbit verification,it is confirmed that the on-orbit dynamic modulation transfer function(MTF)of the MII is≥0.1,which meets the requirements.
关键词
可持续发展科学卫星/1号/大温差/热变形/调制传递函数/仿真/分析
Key words
the first Sustainable Development Goals Satellite(SDGSAT-1)/large temperature difference/thermal deformation/modulation transfer function/simulate/analyze
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