Abstract: In the process of the diversified functions and complex geometric of spacecraft, aiming at the problems of shielding analysis and design optimization among components, analyze and evaluate the potential solutions. Through coordinate rotation, the shielding geometry is projected from the three-dimensional space onto the two-dimensional plane, and the problem is simplified to the judgment of the geometric relationship between points and triangles. Based on the panel method, the judging the front and back positions of geometry and the necessary conditions of point in triangles are introduced for double filter, which greatly reduces the number of calculation tasks and improves the efficiency of shielding analysis. A simplified three-dimensional model of the Starlink Gen2 is constructed, and simulation analysis is carried out. Statistics show that the twice screening can reduce the amount of calculation by about 95% on average. The shielding heatmap of the solar wings corresponding to different position antenna are provided. Verify the correctness and effectiveness of the projection conversion plus two-level screening method, break through the shortcomings of commercial software such as STK, such as single output information and uncontrollable process, and it can better support the optimization work of the layout design of spacecraft components.

Key words: spacecraft, signal shielding, heatmap, panel method, orthographic projection