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Domain decomposition order stepping time domain integration method based on equivalence principle

A technology of order stepping and area decomposition, applied in complex mathematical operations, electrical digital data processing, special data processing applications, etc. Good stability and the effect of overcoming instability

Active Publication Date: 2015-09-16
NANJING UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

However, since the matrix formed by it is a dense matrix, a large amount of memory is consumed whether it is directly solved or iteratively solved, and it is difficult to calculate the size of an electrically large-scale object under the existing computer equipment.

Method used

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  • Domain decomposition order stepping time domain integration method based on equivalence principle
  • Domain decomposition order stepping time domain integration method based on equivalence principle
  • Domain decomposition order stepping time domain integration method based on equivalence principle

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Embodiment 1

[0101]In this embodiment, the simulation of electromagnetic scattering characteristics of multiple metal targets is carried out. The simulation is realized on a personal computer with a main frequency of 2.83GHz and a memory of 3.5GB. Two metal balls with a radius of 0.3m are located at (0,0, 0), (0,0,1.3). The equivalent surface is a metal sphere with a radius of 0.4, the maximum frequency is set to 300MHz, and the center frequency is 150MHz. Both the metal sphere and the equivalent surface are subdivided with a free space wavelength of 0.1, and the metal sphere is divided into 214 triangles (321 inner sides). The equivalent surface is divided into 404 triangles (606 inner sides). In order to verify the correctness and efficiency of the program, the results of this patent are compared with the commercial software FEKO. Figure 4 The dual-station RCS values ​​at different frequency points are given, where (a) the dual-station RCS at the frequency of 50MHz, (b) the dual-statio...

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Abstract

The invention discloses a domain decomposition order stepping time domain integration method based on an equivalence principle. The method includes the steps that interaction between a scattering object and equivalence faces surrounding the object is solved; interaction between the equivalence faces is solved, equivalence scattering electromagnetic current on one equivalence face senses corresponding equivalence scattering electromagnetic current on other equivalence faces, and the equivalence scattering electromagnetic current on the surfaces of the equivalence faces is constantly updated through coupling between all the equivalence faces until a stable state is achieved; according to the obtained interaction relation between the scattering object and the equivalence faces surrounding the object and the interaction relation between the equivalence faces, an iteration method is adopted for solving final equivalence scattering electromagnetic current on the equivalence faces; according to the final equivalence scattering electromagnetic current on the equivalence faces, the radar scattering sectional area is solved based on a reciprocal principle. Rapid electromagnetic scattering simulation can be performed on scattering characteristics of multiple objects, the implementation process is flexible and free, and the method has great actual engineering application value.

Description

technical field [0001] The invention belongs to the technical field of numerical calculation of target electromagnetic scattering characteristics, in particular to an area decomposition order step-by-step time domain integration method based on the equivalent principle. Background technique [0002] How to accurately and efficiently analyze the electromagnetic scattering problem of the target has always been an important mission of computational electromagnetics, and there are many ways to solve it. In practical engineering applications, it is increasingly necessary to analyze the electromagnetic scattering characteristics of target groups composed of various complex targets, multiple targets or periodically repeated targets. importance. Traditional methods based on integral equations such as the method of moments (MoM) have been widely used to analyze the scattering and radiation problems of various targets. However, since the matrix formed by it is a dense matrix, whethe...

Claims

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Application Information

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IPC IPC(8): G06F17/13G06F19/00
Inventor 何姿陈如山樊振宏丁大志
Owner NANJING UNIV OF SCI & TECH
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