Electromagnetic scattering method for rapidly dissolving partial variation of conductor structure
A conductor structure, electromagnetic scattering technology, applied in electrical digital data processing, design optimization/simulation, special data processing applications, etc., can solve problems such as limiting the application of traditional method of moments, and reduce computational complexity and computational time requirements. , the effect of a wide range of applications
Inactive Publication Date: 2017-08-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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However, the complexity of the direct solution of the traditional method of moments is O(N 3 ), where N is the number of unknowns, such a high complexity limits the application of the traditional method of moments in calculating electrically large objects
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[0045] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0046] as attached figure 1 As shown, the present invention mainly solves the problem of rapid analysis of electromagnetic scattering of conductor targets with multiple local modifications, and the electromagnetic scattering in the process of subtracting small structures from one target conductor and adding another small structure. The present invention is referred to as an electromagnetic scattering method for rapidly analyzing local changes in conductor structure, which includes the following six steps:
[0047] Step 1: Structural division of the conductor target. The subtractive local change solves the electromagnetic scattering problem after subtracting a small structure from the target structure. The conductive target is called the parent body, and the small structure that needs to be subtracted from the conductive target is called the free b...
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The invention discloses an electromagnetic scattering method for rapidly dissolving partial variations of a conductor structure. The electromagnetic scattering method comprises two steps: namely a subtraction partial algorithm and an addition partial algorithm, namely implementing the subtraction partial algorithm, firstly, dissolving a total impedance matrix and an inverse matrix of the total impedance matrix of a target conductor of which a free body needs to be subtracted, and expressing the matrixes in modes of partitioned matrixes; secondly, by using a partitioned matrix inversion equation, calculating a relationship equation of the total impedance matrix and the inverse matrix of the total impedance matrix of a residual part; thirdly, by using a Sherman-Morrison-Woodbury equation, expressing an induction current matrix of the residual part in a mode that the inverse matrix of the total impedance matrix is related to a voltage matrix, thereby obtaining electromagnetic scattering of a residual structure after the free body is subtracted. By adopting the electromagnetic scattering method, the efficiency in analyzing target electromagnetic scattering properties is effectively improved, and the method is applicable to analysis on electromagnetic problems of a target with multiple times of partial variations, for example, the electromagnetic scattering problems of a ship antenna distributed in different positions.
Description
technical field [0001] The invention relates to a fast inversion technology of an impedance matrix combining a subtractive local solution and an additive local solution for a target conductor, in particular to an electromagnetic scattering method for quickly analyzing local changes in a conductor structure. Background technique [0002] The electromagnetic scattering problem of TVU targets has been widely concerned by scholars at home and abroad. The Method of Moments (MoM) converts the electromagnetic integral equation into a matrix equation, which is an effective way to calculate the scattering characteristics of the target. However, the complexity of the direct solution of the traditional method of moments is O(N 3 ), where N is the number of unknowns, such a high complexity limits the application of the traditional method of moments in calculating electrically large objects. [0003] In practical electromagnetic engineering problems, it is often necessary to make multi...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 张杨孙运何戴为龙郭莹朱俊杰陈新蕾
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS