The research for the method of near-field localization and identification for underwater noise source with MVDR based on amplitude compensation

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (2) : 51-54,1.

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The research for the method of near-field localization and identification for underwater noise source with MVDR based on amplitude compensation

CHEN Huan1; HE Liang1; YANG De-sen2; SHI Sheng-guo2

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Abstract

Reduce ship noise, firstly we must find the main noise source, then take effective measures to reduce vibration and noise. In this paper, focus on the current lack of the method of noise sources near-field localization and identification such as the method of the near field focused beamforming, introduce the MVDR (minimum variance distortionless response) algorithm based on amplitude compensation. The method inducts the amplitude compensation to the MVDR algorithm at the present, which can effectively estimate the relative intensity of the noise source, increase the spatial resolution of the basic array at low frequencies and further restrain the space fuzzy at high frequencies, and also suppress the background noise at the same time. Therefore, the method can give the spatial location distribution and energy distribution of the system noise source, thus accurately locate the main noise source of the system to take effective measures to reduce vibration and noise. Computer simulation and lake trial data processing results show the validity of this method, which testify this method has certain value in engineering application.

Key words

underwater noise source / near-field / MVDR / amplitude compensation / high-resolution / location identification

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CHEN Huan;HE Liang;YANG De-sen;SHI Sheng-guo. The research for the method of near-field localization and identification for underwater noise source with MVDR based on amplitude compensation[J]. Journal of Vibration and Shock, 2012, 31(2): 51-54,1