高精度遙感相機大溫差界面的熱變形控制和分析

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中圖分類號：V423.43 文獻標志碼：B

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

YU Chengfeng，ZHANG Yongzhi，F(xiàn)U 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

伴隨我國光學遙感衛(wèi)星技術(shù)的發(fā)展，針對對地觀測衛(wèi)星的定位精度、分辨率、穩(wěn)定性等指標要求不斷提高。（剩余4876字）