卫星在轨太阳辐射热流的简化计算方法

Simplified Calculating Method of the Sun Radiation Flux for On-orbit Satellite

针对卫星在轨太阳辐射热流计算过程中计算参数多,计算过程复杂的问题,提出了一种简化的计算方法。该方法在分析卫星、地球和太阳三者之间空间几何关系的基础上,建立了新的计算坐标系,在计算坐标系中对卫星、地球和太阳的位置进行了重新规定,并在此坐标系中推导了卫星太阳辐射热流的计算公式。运用此方法对卫星太阳辐射热流进行分析求解时,轨道参数之间的空间角度关系更为简单,仅需对7个主要参数进行计算,与传统方法相比较计算量减少了约2/3。

A simplified method was put forward to solve the problems of too much orbital parameters and complex space geometry during calculating sun radiation flux for on-orbit satellite. A novel calculation coordinates was built based on studying the space geometrical relationship between the satellite, the earth and the sun. In the coordinates, the space position between the satellite, the earth and the sun was re-ruled and the calculation formula of the sun direct radiation flux was deduced. Using the proposed method to calculate the sun radiation flux, the process is simplified. Compared with conventional methods, only 7 parameters need to be calculated and the parameters are decreased by 2/3.