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针对天文探测卫星定点观测模式下的特定姿态,结合相关科学观测约束、整星能源和热控设计约束及轨道特点,进行了多约束条件下的外热流变化规律分析,对比了有、无遮阳挡板情况下,卫星外热流的差异,并通过虚拟热沉温度,分析了卫星各个舱板的散热能力。基于有、无遮阳挡板的外热流分析结果,从热控角度建议在定点观测模式下,对卫星的观测姿态进行约束,对有低温需求的天文探测器建议加设遮阳挡板,可为天文探测卫星的热控设计提供参考。
According to the specific attitude of astronomical exploration satellite fixed-point observation mode, with the combination of related scientific observation constraints, the whole-energy and thermal control design constraints and orbital characteristics, the law of external heat flow under multi-constraint conditions was analyzed. Board case, the difference between the heat flow outside the satellite, and through the virtual heat sink temperature, analysis of the cooling capacity of the satellite deck. Based on the analysis results of external heat fluxes with and without shade baffle, it is suggested from the point of view of thermal control that the observation attitude of satellites be constrained under the fixed-point observation mode, and the shade baffle should be added to the astronomical detectors with low temperature requirement. Reference for the thermal control design of the satellites.