摘要
大气温室气体监测仪(GMI)通过周期性捕获温室气体的超光谱数据,得到其浓度分布信息,是高光谱观测的重要载荷之一。监测仪指向机构、干涉仪组件、探测器热沉等关键部件的温度水平,温度波动及温度梯度对监测仪的正常工作及测量精度有较大影响。由于该监测仪的构型复杂,星上布局位置靠向阳面,周围热环境恶劣,因此探测器模块的散热及光学部件的温度控制是主要难点。利用热仿真软件对监测仪进行了典型工况的热仿真分析,得到各主要部件温度分布情况:4个通道探测器热沉温度≤10℃;光学镜筒能够控制在10~12℃,温度波动≤3℃/轨;干涉仪温度梯度控制在1.7℃以内。同时将热平衡试验结果及在轨飞行数据进行了比对,试验结果能够较好地包络在轨情况,有力验证了热设计的合理性及试验测试的覆盖性。
Atmosphere greenhouse gas detector,which is one of the important payloads,can get greenhousegases column density by capturing hyper-spectral data.Temperature level,temperature fluctuation and temperature gradient of some key components of this detector,such as pointing mirror shaft,interfere subassembly and heat sink,affect greatly on its normal operation and measurement accuracy.Because of the complex configuration of the detector and the harsh thermal environment around it,therefore,the heat dissipation of detector module and temperature stability control of optical components are the main difficulties.This paper used thermal simulation software to analyze the typical working conditions of the detector.The temperature distribution of the main components is obtained:the four channel heat sink temperature is less than 10℃;Optical barrel temperature can be controlled at 10-12℃,and the temperature fluctuation of each orbit is less than 3℃;The temperature gradient of the interferometer is controlled within 1℃.At the same time,the results of heat balance test and in-orbit data are compared,the test results show that the envelope is in-orbit well,the rationality of thermal design and the coverage of test are validated.
作者
桂利佳
孙立达
陈菡
徐文杰
林德贵
裘桢炜
GUI Lijia;SUN Lida;CHEN Han;XU Wenjie;LIN Degui;QIU Zhenwei(Shanghai Institute of Satellite Engineering,Shanghai 201109,China;Anhui Institute of Optics,Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,Anhui,China)
出处
《上海航天》
CSCD
2019年第S2期174-181,共8页
Aerospace Shanghai
