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The application of genetic algorithm in optimal design of helix traveling wave tube

Author: LiuPeiYin
Tutor: YangZhongHai
School: University of Electronic Science and Technology
Course: Electronic Science and Technology
Keywords: Genetic Algorithms Slow-wave structure Helix Broadband traveling wave tube
CLC: TN124
Type: Master's thesis
Year: 2011
Downloads: 19
Quote: 1
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Abstract


Electric vacuum devices in microwave and millimeter-wave traveling wave tube because it has the advantages of broad-band, high-efficiency, high-power and high reliability, is used in many ground-based and space communications systems. The paper aims to study the use of genetic optimization algorithm to effectively optimize the efficiency of the helix traveling wave tube electronics, shorten the interaction length and discuss the balance between efficiency and bandwidth analog narrowband case. The basic theory and design methods of the paper on the genetic algorithm helix slow wave system works and vacuum helix slow wave structure field distribution, high-frequency characteristics of the helix slow-wave system and a wiki in the field theory of Note - wave interaction theory for a comprehensive introduction. Used in helix traveling wave tube slow wave structure optimization design of the genetic algorithm design and optimization algorithm using MATLAB language. The genetic algorithm program and the University of Electronic Science and Technology of theory and computer simulation laboratory written note - wave interaction calculation procedures [1-3] as a tool for helix traveling wave tube slow wave structure parameters optimized design. The main work of this paper is summarized as follows: 1, the genetic algorithm design. The optimization algorithm using real-coded linear ordering and best retention selection strategy and adaptive crossover operator sub and adaptive mutation operator operation. The results proved that the design of genetic algorithm is a performance optimization algorithm. 2, the length of the helix traveling wave tube slow wave structure optimization. In the case of a single signal input, the uniform and the three sections of the helix, the genetic algorithm to optimize the impact of the length of the helix of the the electronic efficiency helix traveling wave tube (or output power). 3, the optimal design of multi-stage distribution of helix pitch. In the case of a single signal input, the number of segments of the pitch of the helix is ??more optimized greater electronic efficiency of the resultant helix traveling wave tube, while its tendency to increase also tends to slow. However, the number of helical segments points more, the calculation amount will increase. The 4 helix traveling wave tube input power optimization. The input power of the signal field without much impact on the optimization of a helix traveling wave tube electronic efficiency and optimize the bandwidth of high efficiency helix traveling wave tube. 5, efficient helix traveling wave tube bandwidth optimization. In this paper, genetic optimization algorithm With both ends of the optimized method to optimize the bandwidth of a helix traveling wave tube, to achieve the purpose of expanding the bandwidth, and thus prove a genetic algorithm to optimize bandwidth efficient helix traveling wave tube.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Vacuum Electronics > Microwave tubes > Traveling-wave tube
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