空间站太阳翼振动测量中的动态杂光快速仿真方法

Fast Simulation Method for Dynamic Stray Light in Solar Array Vibration Measurement of Space Station

针对空间站柔性太阳翼振动测量相机的动态杂光快速分析需求,基于全轨道周期下日月地3种环境光源与相机光轴夹角关系、大面积柔性阵面的动态振动位移的模拟,并从点光源和面光源两类光源特性、直接入射和经太阳翼阵面一次反射后再入射两类杂光干扰途径出发,给出了大幅降低运算量的动态杂光判别算法,提升了杂光轨迹随被测对象动态变化时的仿真效率.仿真结果表明,该算法的实时性和准确性均可满足大型柔性太阳翼振动测量相机的杂光分析需求.

For the fast analysis of dynamic stray light of the flexible solar array vibration measurement camera in the space station,the relative angles between three environmental light sources(the sun,the moon and the earth)and optical axis of the camera in the orbital period are computed,meanwhile the dynamic vibration displacements of a large flexible array are simulated,a dynamic stray light discrimination algorithm that significantly reduces the a-mount of computation is given,based on the analysis of environmental light sources characteristics(point source and area source)and two types of stray light interference ways(direct incidence and incidence after primary reflec-tion).The problem of stray light trajectory changing dynamically with the solar array is solved.The simulation re-sults show that the realtime and accuracy of this algorithm can meet the stray light analysis requirements of large flexible solar array vibration measurement cameras.