基于幅度补偿的MVDR水下噪声源近场定位识别方法研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (2) : 51-54,1.

论文

基于幅度补偿的MVDR水下噪声源近场定位识别方法研究

陈欢1; 何良1; 杨德森2; 时胜国2

作者信息 +

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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文章历史 +

摘要

降低舰船噪声，首先要找到其主要噪声源，然后采取有针对性的减振降噪措施。本文针对现有基于近场聚焦波束形成等噪声源近场定位方法的不足，介绍了基于幅度补偿的MVDR(minimum variance distortionless response)近场聚焦波束形成噪声源近场定位识别方法。该方法在MVDR算法的基础上引入幅度补偿，可以有效估计噪声源的相对强度；可以提高基阵在低频段的空间分辨率，在高频段能进一步抑制空间混叠；同时还可以进一步抑制背景噪声，因此该方法能够给出系统噪声源的空间位置分布及能量分布，从而准确找到系统中主要噪声源，采取有针对性的减振降噪措施。计算机仿真及湖试实验数据处理结果验证了该方法的有效性，具有一定的工程应用价值。

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.

导出引用

陈欢;何良;杨德森;时胜国. 基于幅度补偿的MVDR水下噪声源近场定位识别方法研究[J]. 振动与冲击, 2012, 31(2): 51-54,1

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