高精度遥感相机大温差界面的热变形控制和分析

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中图分类号：V423.43 文献标志码：B

Thermal deformation control and analysis of large temperature difference interface of high precision remote sensing camera

YU Chengfeng，ZHANG Yongzhi，FU Bihong，CHEN Youmei， JI Yanchao，HUANG Jin，LIANG Jiyuan

（Innovation Academy for Microsatelites of Chinese Academy of Science，Shanghai 2O13O4，China）

Abstract： Aiming at the problem of thermal deformation on the instalation surface of multispectral imager for inshore（MII） mounted on the first Sustainable Development Goals Satellite（SDGSAT-1），which affects he imaging quality of the MII，the structure and thermal optimization design of the installation of the MIl 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 MIIis O.044 mm at low temperature and 0.034mm at high temperature. By controlling the thermal deformation of the installtion interface，through ground testing and on-orbit verification，itis confirmed that the on-orbit dynamic modulation transfer function（MTF） of the MI is≥O.1，which meets the requirements.

Key words：the first Sustainable Development Goals Satelite（SDGSAT-1）；large temperature difference；thermal deformation；modulation transfer function；simulate；analyze

0引言

伴随我国光学遥感卫星技术的发展，针对对地观测卫星的定位精度、分辨率、稳定性等指标要求不断提高。（剩余4876字）