Simulation Method of Electromagnetic Scattering Characteristics of Rotationally Symmetric Body Based on Matrix Nested Compression
A technology of electromagnetic scattering characteristics and rotational symmetry, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as divergence, and achieve controllable calculation accuracy, accelerated speed, and improved calculation time and calculation speed. Effect
Active Publication Date: 2016-02-10
NANJING UNIV OF SCI & TECH
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Document 1 (Y.WenMing, etal., "ClosedFormModalGreen'sFunctionsforAcceleratedComputationofBodiesofRevolution,"AntennasandPropagation, IEEETransactionson, vol.56, pp.3452-3461, 2008.) Using the closed-form Green's function to accelerate the calculation of rotationally symmetric bodies is a commonly used method. A method to overcome integral oscillations, but the method diverges when analyzing electrically large rotationally symmetric bodies
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Embodiment 1
[0101] According to the method of the present invention, a metal cylinder with a radius of 1m and a height of 20m is simulated. The frequency of the incident wave is 3GHz, the incident angle is (40°, 0°), a total of 43 modes are required, and the number of busbar division lines is 2200. The results are in good agreement with the original rotationally symmetric algorithm, proving the correctness of the method, such as Figure 5 shown. The present invention also provides the changes of the present invention in time consumption and memory consumption. Table 1 is a comparison between the calculation efficiency and the traditional method in Embodiment 1. As can be seen from the table, the memory consumption and calculation time are all obtained faster than the traditional method. Saved.
[0102] Table 1
[0103] method
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The invention discloses a rotational symmetric body electromagnetic scattering property simulation method based on matrix nest compression. The method includes the following steps: building a generatrix of a rotational symmetric body, performing subdividing and discretization to obtain subdivided line segments, establishing a binary tree grouping relation among the subdivided line segments, establishing an index relation between a near-field group and a far-field group, establishing an electric field integral equation of the rotational symmetric body, determining a simulating vector and the total number of modes, breaking every thinnest-layer far-field group mode impedance matrix into two strip-shaped matrixes to be stored respectively with a matrix extraction method, dividing the far-field group impedance matrixes into parent layer near fields and parent layer far fields through the index of layers, performing nest processing layer by layer, breaking each far-field impedance matrix into small matrixes, sequentially determining mode impedance matrixes of all the modes, solving the equations of the mode impedance matrixes one by one, calculating and obtaining far-field information according to the reciprocal theorem to complete the simulation. The method is low in memory consumption, high in equation iteration speed, and capable of efficiently simulating electromagnetic scattering properties of the rotational symmetric body in a large size.
Description
technical field [0001] The invention relates to electromagnetic simulation technology, in particular to a method for simulating electromagnetic scattering characteristics of a rotationally symmetrical body based on matrix nesting compression. Background technique [0002] A rotationally symmetric body is an object that can be obtained by rotating a generatrix around a fixed axis. As an important class of radar targets, such as missile body and radome, people have done quite a lot of research on their electromagnetic scattering characteristics. Especially in tracking and identifying space targets, the electromagnetic scattering analysis of rotating bodies plays an important role. It has always been an important subject in the research of electromagnetic scattering to analyze and study the electromagnetic scattering of various rotating bodies by using the method of rotationally symmetric moments. [0003] Andreasen, M.G first proposed the rotationally symmetric moment method...
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IPC IPC(8): G06F17/50
Inventor 陈如山丁大志樊振宏苏婷陶诗飞沙侃叶晓东査丽萍李士东
Owner NANJING UNIV OF SCI & TECH
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