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Method for calculating electromagnetic scattering fields of three-dimensional high-speed translation targets

A scattering field and target technology, applied in the field of electromagnetic field calculation, can solve problems such as inability to adapt to the complex and diverse shapes of three-dimensional targets, inability to apply electromagnetic field value research, and single solution results.

Inactive Publication Date: 2018-04-20
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Due to the limitations of the coordinate system, boundary conditions, or single solution results or the inability to adapt to the complex and diverse shapes of three-dimensional objects, the previous methods cannot be applied to the research of electromagnetic field values ​​​​of high-speed or even ultra-high-speed moving objects.

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  • Method for calculating electromagnetic scattering fields of three-dimensional high-speed translation targets
  • Method for calculating electromagnetic scattering fields of three-dimensional high-speed translation targets
  • Method for calculating electromagnetic scattering fields of three-dimensional high-speed translation targets

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the drawings and embodiments.

[0044] A method for calculating the electromagnetic scattering field of a three-dimensional high-speed translational target includes the following steps:

[0045] Step 1: Establish a stationary motion coordinate system K'relative to the high-speed translational target, and determine its characteristics;

[0046] Step 1.1: Establish the relative motion coordinate system as K', the relative motion coordinate system K'is stationary relative to the high-speed translation target, that is, the relative motion coordinate system K'has the same motion speed and direction as the target;

[0047] Step 1.2: Establish the relationship between the spatial step size Δx', Δy', Δz' of the relative motion coordinate system K'and the space step size Δx, Δy, Δz of the stationary coordinate system K, and the time of the relative motion coordinate system K' The relationship between the step leng...

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Abstract

The invention provides a method for calculating electromagnetic scattering fields of three-dimensional high-speed translation targets, and relates to the field of electromagnetic field calculation. The method comprises the following steps of: taking an amygdaloid body as a target, and designing and establishing a motion coordinate system which is static relative to the target so as to generate anamygdaloid body grid model and realize free selection of a time step length and a space step length; importing an incident wave in the relative motion coordinate system and calculating an electromagnetic scattering field in the relative motion coordinate system by using FDTD; and finally converting the electromagnetic scattering field into an electromagnetic scattering field under a static coordinate system. According to the method, the motion coordinate system which is static relative to the amygdaloid body target is imported, the incident wave is imported, and amplitude distribution, frequency distribution and phase distribution are included; a conversion relationship between two coordinate systems is solved, and by utilizing the conversion relationship, an electromagnetic scattering field value of the amygdaloid body target under a high-speed translation state is obtained; and the method has the advantages of being novel, simple, easy to operate and suitable for processing more high-speed translation electromagnetic scattering fields of three-dimensional space complicated targets.

Description

Technical field [0001] The invention relates to the field of electromagnetic field calculation, in particular to a method for calculating electromagnetic scattering field. Background technique [0002] As the flight speed of aeronautical devices is getting faster and faster, the electromagnetic research on high-speed moving objects has gradually become a hot issue. However, with the high-speed movement of the object, according to the principle of relativity, the electric field scattering field of the object in the moving state also changes. [0003] Numerical methods for calculating electromagnetic scattering of moving targets have begun to appear. Up to now, some scholars have proposed numerical methods for electromagnetic scattering of moving targets, such as equivalent surface current method and moving boundary method. The previous methods are not suitable for the study of electromagnetic field values ​​of high-speed and even ultra-high-speed moving objects due to the limitatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 郑奎松李亚静徐龙飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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