Differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method

A frequency selective surface, differential evolution algorithm technology, applied in the field of absorbing materials, can solve the problems of long design cycle, lack of directional guidance in the design of absorbing materials, large workload, etc., to achieve the effect of shortening the design cycle

Active Publication Date: 2015-06-24
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] At present, the commonly used design method of multi-layer composite absorbing structure is to adjust the structure, size and material ratio one by one according to experience. It is difficult t

Method used

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  • Differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method
  • Differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method
  • Differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method

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Embodiment Construction

[0039] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] figure 1 A differential evolution algorithm multi-layer wave-absorbing composite structure and material optimization design method provided for the embodiment of the present invention includes the following steps:

[0041] Step 1: Determine the objective function of the optimized composite absorbing model and the characteristic parameter variables and boundary conditions that affect it, initialize the variable parameters, and the iteration number G=0;

[0042] In said step 1, the objective function of the composite structure model optimization of establishment is:

[0043] T = ω 1 T 1 +ω 2 T 2

[0044] Among them, T represents the objective function value, ω 1 , ω 2 Indicates the weight coefficient, which can be a certain non-negative real number, which is determined according to the importance of the total thickness of the composite mater...

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Abstract

The invention discloses a differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method. The method includes: performing mutation and crossover operations by the aid of the different evolution algorithm; subjecting the composite structure to modeling calculation by the aid of electromagnetic simulation software and feeding back calculated results to a program to complete the operations; searching and generating an optimum model reaching the objective function and optimal structure parameters and material materials in variant fields. By the differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material, the model can be optimized in structure parameters, and a new material with the optimal ratio can be obtained through the differential evolution algorithm according to an original absorber and the electromagnetic parameters on the substrate. The optimum design method has the advantages that design cycle is short, and the composite wave-absorbing structure and material low in reflection coefficient, wide in frequency band and thin in thickness can be obtained rapidly.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to an optimal design method for obtaining a multilayer frequency-selective surface composite wave-absorbing structure and material with low reflection coefficient, wide frequency band, and thin thickness. Background technique [0002] With the development of electronic technology and military technology, the introduction of frequency selective surface into the design of multilayer absorbing materials can effectively improve the absorption performance of absorbing materials, and meet the needs of broadband and strong absorption of absorbing materials. Reasonable design methods are helpful to guide the research and development of multi-layer frequency selective surface composite absorbing structures, which can greatly improve the efficiency of research and design, reduce a large number of experimental explorations, and shorten the design cycle. [0003] At present, th...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06N3/12
Inventor 王群吕志蕊唐章宏徐欣欣
Owner BEIJING UNIV OF TECH
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