Method for obtaining carrier platform broadband RCS based on SAIM and CAT

A carrier platform and broadband technology, which is applied in the fields of communication and radar electromagnetics, can solve the problems of excessive number of basis functions and uneven grid division, and achieve the effects of improving convergence speed, accuracy and condition number

Active Publication Date: 2021-10-29
XIDIAN UNIV
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Problems solved by technology

[0005] The object of the present invention is to address the deficiencies in the above-mentioned target broadband RCS simulation method, and provide a method for obtaining carrier platform broadband RCS based on SAIM and CAT, which is used to solve the existing problems when solving the broadband RCS of the complex conductor carrier platform in the prior art. The number of basis functions is too large, the grid is not uniform, and the frequency sweep needs to be point by point

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  • Method for obtaining carrier platform broadband RCS based on SAIM and CAT
  • Method for obtaining carrier platform broadband RCS based on SAIM and CAT
  • Method for obtaining carrier platform broadband RCS based on SAIM and CAT

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] refer to figure 1 , to further describe the specific steps of the present invention.

[0046] Step 1, dividing the carrier platform.

[0047] A spatial geometric model of the PEC carrier platform is established, and the spatial geometric model is divided into multiple sub-regions along the joints determined by the shape of the PEC carrier platform on its outer surface.

[0048] Add a common virtual surface along the dividing line between each adjacent sub-area to form the closed sub-area of ​​the adjacent sub-area;

[0049] Step 2, divide each closed sub-region.

[0050] Using the triangulation method, the outer surface of each closed sub-region is subdivided, and the coordinates and numbering information of the triangle vertices of the actual surface and the public virtual surface subdivision mesh of all closed sub-regions are obtained.

[0...

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Abstract

The invention discloses a method for obtaining carrier platform broadband RCS based on SAIM and CAT. The method comprises the steps: segmenting a complex carrier platform target into a plurality of sub-regions, and reserving public virtual surfaces between the adjacent sub-regions ; adopting triangles to subdivide all closed sub-regions and establishing respective Cartesian grids for each sub-region; calculating a Chebyshev sampling point of the broadband RCS, and calculating an initial surface induction current of the sub-region at the Chebyshev sampling point by using AIM; imposing boundary condition updating excitation vectors on the virtual surfaces of the adjacent sub-regions, and updating the surface induction current of the sub-regions at Chebyshev sampling points until convergence; and improving the current precision by utilizing Meili approximation, and obtaining the broadband radar cross section of the complex carrier platform. According to the method, the calculation time is greatly shortened under the condition of ensuring the precision, and the convergence speed is improved.

Description

technical field [0001] The present invention belongs to the field of communication technology, and further relates to a combination of a subdomain adaptive integral method SAIM (Subdomain Adaptive Integral Method) and Chebyshev approximation technology CAT (Chebyshev Approximation Technique) in the field of radar electromagnetic technology to obtain carrier platform broadband Radar Cross Section RCS (Radar Cross Section) method. The invention can be used to obtain the wideband radar scattering cross section of the complex conductor carrier platform. Background technique [0002] In stealth and anti-stealth technology, radar target recognition, broadband radar and ultra-wideband radar technology, it is necessary to analyze and calculate the broadband electromagnetic scattering characteristics of radar targets, including tanks, ships, aircraft, missiles, satellites and portable communications It is of great significance to quickly and accurately predict the broadband radar cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G06F30/20G06F17/14
CPCG01S7/41G06F30/20G06F17/142G06F2111/02Y02A90/10
Inventor 龚皓轩王兴刘春恒刘阳刘英张海荣马香港
Owner XIDIAN UNIV
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