基于集合经验模态分解的舰船辐射噪声能量分析

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (16) : 55-59.

论文

杨宏1,2，李亚安1，李国辉1,2

作者信息 +

Energy analysis of ship radiated noise based on ensemble empirical mode decomposition

YANG Hong1,2，LI Ya-an1，LI Guo-hui1,2

Author information +

文章历史 +

摘要

利用集合经验模态分解方法研究舰船辐射噪声的特征参数提取及分类，对预处理后三种不同类别舰船辐射噪声进行能量分析，讨论其高低频能量差特征参数。计算不同类别、一定样本数量的舰船辐射噪声高低频能量差发现，同类舰船高低频能量差基本处于同一水平，不同类型舰船高低频能量差存在明显差异。结果表明，利用集合经验模态分解方法提取的舰船辐射噪声特征参数对舰船类别具有较好的可分性。可为水下目标信号探测及识别提供参考。

Abstract

Ensemble empirical mode decomposition method has been developed for nonlinear and non-stationary signal. The method can be applied to the feature extraction and classification of ship radiated noise. Three different types of ship radiated noise are chosen to perform energy analysis. After pretreatment, the ship radiated noise is decomposed into several intrinsic mode functions by ensemble empirical mode decomposition, and energy difference between the high and low frequency is extracted and analyzed. The results show that energy difference between the high and low frequency is at the same level for similar ships, but it is obvious difference for different types of ships. Therefore, we conclude that the energy difference between the high and low frequency can be used as a new feature of ship signals. It provides an alternative for detecting and recognizing underwater target signals.

导出引用

杨宏1,2，李亚安1，李国辉1,2. 基于集合经验模态分解的舰船辐射噪声能量分析[J]. 振动与冲击, 2015, 34(16): 55-59

YANG Hong1,2，LI Ya-an1，LI Guo-hui1,2 . Energy analysis of ship radiated noise based on ensemble empirical mode decomposition[J]. Journal of Vibration and Shock, 2015, 34(16): 55-59

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