Space heat flux simulation and programmable load for thermal test of space optical remote sensor
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摘要: 以某太阳同步轨道空间光学遥感器为例,阐述了空间外热流分析计算、热平衡试验外热流模拟以及外热流程控加载的全过程.首先,总结了空间光学遥感器外热流模拟的完整流程.其次,简要介绍了太阳辐射、地球反照、地球红外辐射三种空间外热流的计算方法.然后,对该空间遥感器进行了空间综合吸收外热流计算,获得了阳照区及阴影区外热流平均值.最后,确定了热平衡试验外热流的模拟方法和策略,利用LabVIEW语言编写了程控电源开环控制程序,实现了热试验外热流的准确加载.试验结果表明,外热流值加载偏差在2.5%以内,满足热平衡试验要求.Abstract: The whole process of space heat flux analysis, heat flux simulation and programmable load for thermal test is expatiated for a given space optical remote sensor working in sun-synchronous orbit. Firstly, space heat flux simulation process of space optical remote sensor is summarized. Secondly, calculation methods of solar radiation, earth albedo and earth infrared radiation are introduced. Thirdly, the space total absorbed heat flux for the given space optical remote sensor is calculated, and the average heat flux of the sunlit area and the shaded area is gained. Finally, the space heat flux simulation method and tactic of thermal test are confirmed, and open-loop control program of programmable power is written using LabVIEW language, and space transient heat loads of thermal test are accurately applied. The results of test indicate that the deviations of applied heat load are within 2.5%, and the deviations which can meet the requirements of thermal test.
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Key words:
- space optical remote sensor /
- space heat flux /
- programmable load
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