Target radar scattering cross-section pre-estimation system with graphics electromagnetic computation accelerated by index information

Abstract

The invention discloses a pre-evaluation system for accelerating computation of target radar scattering cross section by graphical electromagnetic computation through index information. The system comprises a surface element modeling module (1), an index information compilation module (2), an entity display module (3), an index information unscrambling module (4), a geometric information analysis module (5) and a target radar scattering cross section acquisition module (6). The surface elements of a target model are numbered, an index list of the surface elements is established, the surface element index and the surface element color are subject to one to one correspondence, the background color is set as black, components of three primary colors namely red, green and blue are zero, the surface element blanking is finished by a GPU, the corresponding surface element index is obtained by the color of pixels so as to obtain normal vectors and depth values of the pixels. The whole process needs no illumination, the surface normal vector is pre-obtained in a drawing process of the surface elements, a color value is read only for once, and twice memory exchange is executed, which is one computation less than the normal graphical electromagnetic computation, thus shortening the computation time.

Description

technical field [0001] The present invention relates to a radar cross-section pre-evaluation in stealth design, more particularly, a pre-evaluation system that utilizes index information to accelerate graphic electromagnetic calculation of target radar cross-section. Background technique [0002] In estimating the radar cross section (RCS, Radar Cross Section) of electrically large and complex targets, because the numerical method is still weak for the RCS calculation of electrically large and complex targets, the graphical electromagnetic calculation method has been paid more and more attention. Compared with the numerical method There is incomparable computing speed. [0003] The graphics electromagnetic calculation method utilizes the graphics acceleration function of the computer display hardware to obtain the normal vector corresponding to each pixel on the target surface through the irradiation of red, green and blue monochromatic light, and uses the depth buffer (Z-Bu...

AI Technical Summary

Problems solved by technology

[0004] Since the graphical electromagnetic calculation method needs two illuminations to obtain the normal vector of the target surface, it involves a lot of time-consuming memory exchanges on the computer, and the GPU is used for graphics floating-point calculations, the accuracy is not as good as that of the CPU, resulting in the target radar cross-section pre-evaluation system. When the operation is extended, the accuracy decreases

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