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Niche genetic algorithm-based coherent source fast localization estimation method for single-vector hydrophone

A genetic algorithm and azimuth estimation technology, which is applied in the field of fast azimuth estimation of single vector hydrophone coherent sources, can solve problems such as reducing algorithm performance, and achieve the effect of speeding up the solution speed and improving reliability.

Active Publication Date: 2018-11-20
HARBIN ENG UNIV
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Problems solved by technology

However, during the solution process, due to the magnitude ratio factor k between the two source signals 0 Unknown, so only through the Perform traversal search to complete the objective function Finding the global maximum
The traversal process will greatly increase the amount of calculation and greatly reduce the performance of the algorithm

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  • Niche genetic algorithm-based coherent source fast localization estimation method for single-vector hydrophone
  • Niche genetic algorithm-based coherent source fast localization estimation method for single-vector hydrophone
  • Niche genetic algorithm-based coherent source fast localization estimation method for single-vector hydrophone

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Embodiment Construction

[0043] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. The method flow chart of the present invention is as figure 1 Shown, the present invention comprises the following steps:

[0044] Step 1: For the original objective function to re-represent. remember but can be written as a function of z Reconstruct the objective function as shown in formula (2).

[0045] g(z)=max f(z) (2)

[0046] g(z) will replace f(z) as the new objective function and perform niche genetic algorithm on g(z) to achieve the purpose of fast solution.

[0047] Step 2: Set the evolutionary algebra counter s to 1, and randomly select M initial points The initial point set W(t) formed.

[0048] Step 3: Calculate the fitness of each point g(z i )(i=1,2,...,M), sort them in descending order according to their fitness values, and memorize the first N points (N

[0049] Step 4: Perform a proportional sele...

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Abstract

The invention relates to a niche genetic algorithm-based coherent source fast localization estimation method for a single-vector hydrophone. According to the method of the invention, a niche genetic algorithm can be utilized to optimize a solution process, so that a global optimal solution can be quickly obtained; estimated quality can be evaluated qualitatively and quantitatively through using the time-process graph of an azimuth; and therefore, the quality of a calculation result, namely, the confidence of the calculation result, can be qualitatively evaluated directly according to the fluctuation of the time-process graph, and the calculation result can be also quantitatively evaluated according to the numerical values of the numerical characteristics of the time-process graph. Since avector z is introduced, the design scheme of a multivariate niche genetic algorithm is provided, and therefore, the univariate niche genetic algorithm can be extended into the multivariate niche genetic algorithm with the complexity of the algorithm not increased.

Description

technical field [0001] The invention relates to a single-vector hydrophone coherent source rapid azimuth estimation method, in particular to a single-vector hydrophone coherent source rapid azimuth estimation method based on a niche genetic algorithm, belonging to the field of vector hydrophone azimuth estimation. Background technique [0002] Compared with traditional hydrophones that can only measure sound pressure, vector hydrophones can measure sound pressure and vibration velocity information in the sound field at the same time, and can obtain more sound field information. Widespread concern. The estimation of underwater target azimuth must be completed by sound pressure hydrophone array, and for the commonly used linear array, the target azimuth will also have the problem of ambiguity on the left and right sides. In contrast, a single vector hydrophone can complete the target's azimuth estimation, and there is no ambiguity problem on the left and right sides, which gr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/802
CPCG01S3/802
Inventor 李秀坤王集徐天杨
Owner HARBIN ENG UNIV
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