空间光学相机焦面拼接基座高温度稳定性控制  

Temperature Control with High Stability for the Assembly Base of Space Optical Cameras

作　　者：郭楠[1] 于波[1] 夏晨晖 于志[1] 常君磊[1] GUO Nan;YU Bo;XIA Chenhui;YU Zhi;CHANG Junlei(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2020年第4期64-73,共10页Spacecraft Recovery & Remote Sensing

基　　金：国家重大科技专项工程。

摘　　要：拼接基座作为多片CCD的支撑结构,是高分辨率大视场空间光学相机的重要组成部分,其温度稳定性直接影响CCD的位置精度,进而影响光学系统成像品质。然而安装于拼接基座的CCD、焦面电路等多个间歇性工作热源的热扰动对拼接基座的温度稳定性控制带来很大困难。文章提出了一种精细化控温回路设计方法,通过优化控温阈值、控温点位置以及局部加热热流密度,实现了主动控温与热源工作的匹配,有效提高了拼接基座的温度稳定性。热平衡试验结果表明:开机期间拼接基座的温度稳定性优于0.6℃,满足指标要求。Supporting multi-piece CCDs,the assembly base is an important part of space optical cameras,whose temperature stability directly affects the position accuracy of the CCD and imaging quality of the optical system.However,the thermal disturbance of intermittent working heat sources such as CCD and focal plane circuit makes temperature stability control of the assembly base more difficult.This paper proposes a refined temperature control loop design method based on optimizing temperature control threshold,temperature control point position and local heat flux.This method realizes a match between active thermal control and heat source operation,and can effectively improve the temperature stability of the assembly base.The camera thermal balance test results show that the assembly base’s temperature stability is better than 0.6℃and meets the requirements.

关 键 词：拼接基座 电荷耦合器件 焦面组件 温度稳定性 空间光学相机 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]