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

YANG Hong1,2,LI Ya-an1,LI Guo-hui1,2

Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (16) : 55-59.

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PDF(2339 KB)
Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (16) : 55-59.

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

  • YANG Hong1,2,LI Ya-an1,LI Guo-hui1,2 
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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.
 

Key words

ensemble empirical mode decomposition / ship radiated noise / energy difference between the high and low frequency / feature extraction

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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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