南京航空航天大学学报（英文版）2025，Vol.42Issue(4)：452-463,12.DOI:10.16356/j.1005-1120.2025.04.002
地球静止轨道大口径反射式相机"日凌"耐受能力提升的热控设计方法
Thermal Control Design for Enhancing Tolerance of Large-Aperture Reflective Camera"Sun Transit"on Geostationary Earth Orbit
摘要
Abstract
The large-aperture reflective cameras on the geostationary orbit are susceptible to significant temperature fluctuations due to the"Sun transit"effect.To address the shortcomings of existing thermal control measures using camera sunshades to suppress the"Sun transit"and the issue of excessively large solar avoidance angles determined solely by geometric relationships,a thermal control design method is proposed that involves adding multi-layer thermal protection at the secondary mirror position of the camera.The goal is to optimize the avoidance angle and enhance the camera's tolerance to"Sun transit".A heat balance and motion relationship between the avoidance angle and duration is established.Then,the minimum solar avoidance angle after adopting the multi-layer thermal protection design is calculated.This angle is compared with the one determined by geometric relationships,leading to the conclusion that this method can effectively enhance the camera's tolerance to"Sun transit".A heat dissipation scheme is proposed that involves a coupled north-south heat spreader design with low-temperature compensation for the internal heat source.The calculation results of the two avoidance angles are applied to the calculation of the heat dissipation area and low-temperature compensation power,achieving a closed-loop heat dissipation scheme.Puls,the superiority of the multi-layer thermal protection design method is demonstrated from the perspectives of heat dissipation area and low-temperature compensation power requirements.A comparative analysis of simulation analysis,thermal balance tests,and in-orbit temperature data further validates the effectiveness of this method.关键词
地球静止轨道/日凌/阳光规避/热控设计/热防护Key words
geostationary earth orbit/Sun transit,solar avoidance/thermal control design/thermal protection分类
航空航天引用本文复制引用
连新昊,夏晨晖,高超..地球静止轨道大口径反射式相机"日凌"耐受能力提升的热控设计方法[J].南京航空航天大学学报（英文版）,2025,42(4):452-463,12.基金项目
The work was supported by the Na-tional Key Research and Development Program of China(No.2021YFC2202102). （No.2021YFC2202102）
