A Method for Computing Electromagnetic Scattering Field of Three-dimensional High-speed Translation Target

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 calculations, in particular to a method for calculating electromagnetic scattering fields. Background technique [0002] With the flight speed of aviation devices getting faster and faster, electromagnetic research on high-speed moving objects has gradually become a hot topic. However, with the high-speed motion 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 the calculation of electromagnetic scattering of moving targets began to appear. So far, some scholars have proposed numerical methods for electromagnetic scattering of moving targets, such as the equivalent surface current method and the moving boundary method. 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...

AI Technical Summary

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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