Antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion

A technology of electromagnetic pulse and statistical method, applied in the direction of nonlinear system model, chaotic model, calculation, etc., can solve the problem of increasing calculation amount, achieve the effect of improving calculation efficiency and saving calculation time

Pending Publication Date: 2018-11-30
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0004] Traditional methods usually use Monte Carlo numerical simulation to obtain the uncertainty of the antenna coupling response due to these uncertain factors. However, as the number of uncer

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  • Antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion
  • Antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion
  • Antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion

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Embodiment Construction

[0029] The present invention focuses on improving the calculation efficiency of the uncertainty of high-altitude electromagnetic pulse effects. Based on this idea, the following technical solutions are conceived:

[0030] 1. Determine the input parameters and output indicators of the antenna HEMP time-domain coupling response model

[0031] Firstly, according to the antenna structure, select the appropriate metal object electromagnetic scattering calculation tool, create the antenna HEMP coupling response model, and determine the input parameters of the HEMP coupling response model, such as antenna structure size, subdivision size, load, free space relative permittivity and other models Parameters and environmental parameters; and the selection of HEMP excitation field waveforms, such as specific waveforms such as IEC standard waveforms and Bell laboratory waveforms, and corresponding waveform parameters. Determine the output indicators of the coupling response model, such as ...

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Abstract

The invention provides an antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion, which has high precision of statistic result, excellent computation efficiency and meets requirements on related profession evaluation work well. The method includes the steps of (1), according to the antenna structure, building an antennaHEMP coupling response model through a corresponding electromagnetic field scattering algorithm; (2), performing uniform conversion as needed according to uncertainty variable set by users and its statistical property distribution pattern, and subjecting coupled random response to the polynomial chaos expansion by using the corresponding polynomial basis; (3), according to types of different polynomials, acquiring coefficients of the different polynomials through Gauss integral in corresponding manners so as to obtain the analytical expression of the antenna HEMP coupling response; (4), deducing to obtain statistical characteristic parameter of the antenna HEMP coupling response and performing the Monte Carlo method to obtain a probability density function and a cumulative probability distribution function.

Description

technical field [0001] The invention relates to a statistical analysis method for the coupling response performance of high-altitude electromagnetic pulse antennas, which is an important part of the effect evaluation of high-altitude electromagnetic pulse (HEMP) wireless communication equipment and the design of electromagnetic pulse protection for wireless communication equipment. It can also play an important role in the fields of communication anti-jamming and electromagnetic compatibility. Background technique [0002] The high-altitude electromagnetic pulse environment has the characteristics of large field strength amplitude, high electromagnetic energy, and wide irradiation area. All communication antennas installed outdoors within the coverage area will be excited to generate a certain coupling current, and the electromagnetic energy will flow along the antenna port, The radio frequency cable enters the interior of the communication equipment, causing damage to the c...

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Application Information

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IPC IPC(8): G06F17/50G06N7/08
CPCG06N7/08G06F30/20
Inventor 杜传报刘政毛从光吴伟聂鑫崔志同吴刚孙东阳秦锋
Owner NORTHWEST INST OF NUCLEAR TECH
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