Influence of Wave Velocity Range on Accuracy of PSO Location Algorithm

doi:10.12068/j.issn.1005-3026.2021.04.015

Abstract

Abstract: The accuracy of the known wave-speed acoustic emission positioning algorithm is highly restricted by the accuracy of the initial wave speed test， an acoustic emission location algorithm was developed based on the particle swarm optimization (PSO) algorithm no need to pretesting wave velocity. The fitness function was constructed based on the time difference received by the sensor， and the function was solved by the algorithm to obtain the acoustic emission source position and wave velocity. The influence of the difference of different wave speed assignment ranges and the difference ratio (φ) between the upper and lower bounds of different wave speed assignment ranges and the real wave speed value on the accuracy of the algorithm was studied. Then， a lead-off test was carried out to compare and analyze the location accuracy of the PSO algorithm and the simplex algorithm. The results show that the PSO algorithm location error is less than 10% under different wave velocity ranges and different φ values. When the wave velocity assignment range difference is 2000m/s and φ is 1， the algorithm accuracy is the highest. The positioning accuracy of the algorithm in this paper is significantly better than the traditional simplex positioning algorithm.

Key words: acoustic emission location; particle swarm optimization; no need to pre-testing wave velocity; wave velocity assignment range; location accuracy

CLC Number:

TD76

LI Yuan-hui ，CHEN Zhi-yang， XU Shi-da. Influence of Wave Velocity Range on Accuracy of PSO Location Algorithm[J]. Journal of Northeastern University(Natural Science), 2021, 42(4): 561-566.

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