Time-domain order step-by-step analysis method for transient electromagnetic characteristics of aircraft formation

A technology of electromagnetic characteristics and order step, applied in instruments, radio wave measurement systems, etc., to achieve the effects of less consumption, faster calculation speed, and better stability

Active Publication Date: 2018-09-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the traditional frequency domain method is a steady-state analysis method, which can only analyze the electromagnetic scattering characteristics of the target at a single frequency point at a time, and the excitation waveform can only use a single-frequency sinusoidal waveform, which has great limitations.

Method used

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  • Time-domain order step-by-step analysis method for transient electromagnetic characteristics of aircraft formation
  • Time-domain order step-by-step analysis method for transient electromagnetic characteristics of aircraft formation
  • Time-domain order step-by-step analysis method for transient electromagnetic characteristics of aircraft formation

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Embodiment 1

[0109] This embodiment has carried out the simulation of the electromagnetic scattering characteristics of a plurality of metal targets, and the simulation is realized on a personal computer with a main frequency of 2.83GHz and a memory of 3.5GB. Three cubes with a side length of 0.3 meters have center coordinates respectively (0,0, 0), (0,0,1.6), (1.2,0,0), the equivalent surface is a spherical surface with a radius of 0.4 meters. Using modulated Gaussian plane wave excitation, the maximum frequency is set to 300MHz, the center frequency is 150MHz, and the incident direction is θ, The subdivision size of the metal cube is 0.1m, and the equivalent surface is divided into two types of meshes: triangle and ring, among which the subdivision size of the triangle is 0.12m, and the busbar is divided into 16 segments on average, using 3 Fourier modes , calculated up to order 50. In order to verify the correctness and efficiency of the program, the results of this patent are compare...

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Abstract

The invention discloses a time-domain order stepping analysis method for the transient electromagnetic property of an aircraft fleet. According to the method, broadband time-domain electromagnetic pulses serve as excitation to establish a time-domain analysis model of the aircraft fleet; each aircraft is set as a solving sub area, and scattering current of the sub area reaches the equivalent surface surrounding the sub area in an equivalent manner; the equivalent surfaces couples each other to update the equivalent scattering electromagnetic flows at the surfaces continuously till the flows are stable; and the sectional radar scattering area is solved via the final equivalent scattering electromagnetic flows of the equivalent surfaces. Multiple objects can be simulated rapidly in the electromagnetic manner, the method can be used to analyze the transient electromagnetic property of the objects, expansion of an incident field, interaction of the equivalent surfaces and calculation of the sectional radar scattering surfaces all utilize a rotary symmetric moment method, the calculation speed is improved, consumption of memory is greatly reduced, the time-domain order stepping analysis method is post-time stable, and the application value of practical engineering is very high.

Description

technical field [0001] The invention belongs to the technical field of numerical calculation of target electromagnetic scattering characteristics, in particular to a step-by-step analysis method for time domain order of transient electromagnetic characteristics of aircraft formation. 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, the traditional frequency domain method i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
Inventor 丁大志陈如山樊振宏何姿
Owner NANJING UNIV OF SCI & TECH
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