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为了使空间相机热设计、热分析、热试验具备准确、可靠的热边界条件,对太阳同步圆轨道空间相机的瞬态外热流进行了计算。总结了卫星空间定位的6个轨道根数之间的关系,给出了太阳同步圆轨道空间定位的必要参数。针对某给定太阳同步圆轨道,采用STK软件进行了轨道面与太阳光矢量相对位置关系(β角)的计算,确定了该轨道的高、低温工况位置。归纳了空间外热流的理论计算方法,以外接于卫星平台的空间相机为例,建立了外热流计算模型,采用IDEAS/TMG模块对给定太阳同步圆轨道的高、低温工况轨道周期内瞬态外热流变化进行了分析计算,得出了太阳辐射热流、地球太阳反照热流、地球红外辐射热流在轨道周期内的详细变化曲线,得到的结果可以作为空间相机热设计、热分析及地面热试验外热流模拟的输入条件。
In order to make space camera thermal design, thermal analysis, thermal test with accurate and reliable thermal boundary conditions, the transient external heat flow of solar synchronous circular orbit space camera was calculated. Summarizes the relationship between the number of 6 orbits of the satellite space location and gives the necessary parameters for the space positioning of the solar synchrotron orbit. For a given solar synchronous circular orbit, STK software was used to calculate the relative position (β angle) between the orbital plane and the sunlight vector, and the high and low temperature conditions of the orbit were determined. Summarized the theoretical calculation method of external heat flow in space, taking the space camera attached to the satellite platform as an example, the external heat flow calculation model was established. By using IDEAS / TMG module, The results show that the solar radiation heat flux, the earth solar heat flux and the Earth’s infrared radiation heat flux in the orbital period can be used to analyze the heat flux in the space. The obtained results can be used as the thermal design, thermal analysis and surface thermal test External heat flow simulation input conditions.