Method for analyzing electromagnetic scattering of complex target through MDA and MLSSM

A technology for electromagnetic scattering and complex targets, applied in electrical digital data processing, instruments, calculations, etc., to achieve the effect of reducing iterative solution time and fast matrix-vector multiplication

Active Publication Date: 2013-04-24
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Iterative solution based on MLSSM sparse representation has not been reported

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  • Method for analyzing electromagnetic scattering of complex target through MDA and MLSSM
  • Method for analyzing electromagnetic scattering of complex target through MDA and MLSSM
  • Method for analyzing electromagnetic scattering of complex target through MDA and MLSSM

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Embodiment Construction

[0028] combine figure 1 , a kind of method of the analysis complex target electromagnetic scattering based on MDA and MLSSM of the present invention, comprises the following steps:

[0029] Step 1. Set the parameters of the incident plane wave, and set the frequency and angle of incidence of the incident plane wave according to the actual physical background; the frequency of the incident plane wave is in the microwave frequency band, and the angle of incidence is (θ, φ) in spherical coordinates, where θ∈ [0°,180°], φ∈[0°,360°].

[0030] Step 2. Use Ansys software to establish the geometric model of the target to be sought, and then use planar triangles for discrete subdivision; when using planar triangles for discrete subdivision, use triangular meshes based on RWG basis functions to subdivide the complex target surface. The number of triangles subdivided in the square electrical wavelength is greater than 120.

[0031] Step 3. Use the octree structure to group the subdivid...

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Abstract

The invention discloses a method for analyzing the electromagnetic scattering of a complex target through an MDA (Model-Driven Architecture) and an MLSSM (Multilevel Simply Sparse Method). The method comprises the steps of: at first, establishing an octree structure of a target object, obtaining, through the MDA method, a far-field action portion corresponding sparse low-rank representation in a dense impedance matrix formed by a discrete electric field integral equation, then by using the improved MLSSM, representing the low-rank-represented portion in the impedance matrix, and in the end, on the basis of the improved MLSSM representation, constructing an algorithm for rapidly calculating matrix-vector product, which is suitable for iterative solution. The method can greatly reduce the calculation time and the memory requirement which are required by using an electric field integral equation method for analyzing the electromagnetic scattering of the complex target.

Description

technical field [0001] The invention relates to a fast technology for accelerating matrix-vector multiplication calculation in solving electromagnetic problems by an integral equation method, in particular to a method for analyzing electromagnetic scattering of complex targets based on MDA and MLSSM. Background technique [0002] In recent years, analyzing the electromagnetic scattering characteristics of three-dimensional objects with arbitrary shapes has attracted more and more attention from domestic and foreign researchers. Its applications are mainly manifested in: radar system design and target identification, stealth and anti-stealth of military weapons, electromagnetic compatibility in complex environments, etc. Since radar works in the microwave frequency band, common military targets, such as tanks, missiles, aircraft, etc. not only have complex geometric structures, but also have large electrical dimensions, which increases the complexity of the analysis of scatte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 胡小情陈如山丁大志樊振宏
Owner NANJING UNIV OF SCI & TECH
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