Fast calculation method of target electromagnetic scattering characteristics

Abstract

The invention provides a fast calculation method of target electromagnetic scattering characteristics. The fast calculation method comprises the following steps: carrying out overall subdivision on an established geometric profile non-conformal grid model, selecting induced electromagnetic flow on an analog target surface of an electromagnetic basis function on a target subdivision grid, constructing impedance matrix elements by using a discontinuous Galerkin integral equation and boundary conditions, grouping the targets by using a tree block grouping strategy, accelerating a matrix-vector multiplication speed by using an adaptive cross approximation algorithm, iteratively calculating an electromagnetic flow inductance coefficient on the target surface under an irradiation source by using a generalized minimal residual method, calculating a radiation field of induced electromagnetic flow on the target surface, and obtaining secondary scattering field characteristic data. The fast calculation method provided by the invention has the advantages of strong adaptability and high calculation precision, greatly expands the calculation efficiency and the calculation ability of the integral equation, reduces the subdivision difficulty, and is easy for engineering.

Description

technical field [0001] The invention relates to a fast calculation method for target electromagnetic scattering characteristics, in particular to a calculation method for discontinuous Galerkin integral equation based on adaptive cross approximation acceleration. Background technique [0002] Rapid and accurate calculation of target electromagnetic scattering characteristics is one of the important means to analyze target stealth performance and anti-stealth design. Carry out rapid and accurate calculation of the electromagnetic scattering characteristics of electrically large and complex targets, and provide a basis for weapon system parameter design and electromagnetic wave induction mechanism statistics. For example, if a certain missile radome including the Jerusalem cross frequency selective (FSS) surface is meshed according to the basis function size, 96327 triangular surface elements can be obtained, but the overall mesh of the basis function is not enough to describe...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for fast calculation of electromagnetic scattering characteristics of a target, which solves the problem of rapid simulation calculation of electron scattering of multi-scale electrically large and complex targets in the prior art, provides technical means for obtaining electromagnetic scattering characteristics of multi-scale electrically large-size targets, and has strong adaptability , High calculation accuracy, which greatly expands the calculation efficiency and calculation ability of the integral equation, reduces the difficulty of subdivision, and is easy to realize in engineering

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