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《Journal of Vibration and Shock》 2015-16
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Energy analysis of ship radiated noise based on ensemble empirical mode decomposition

YANG Hong;LI Ya-an;LI Guo-hui;College of Marin,Northwestern Polytechnical University;School of Electronic and Engineering,Xi'an University of Posts and Telecommunications;  
The method of ensemble empirical mode decomposition has been developed for nonlinear and nonstationary signal. The method can be applied to the feature extraction and classification of ship radiated noise. Three different types of ship radiated noises were chosen to perform the energy analysis. After pretreatment,the ship radiated noise was decomposed into several intrinsic mode functions by ensemble empirical mode decomposition,and the energy difference between the high and low frequency was extracted and analyzed. The results show that the energy difference between the high and low frequency is at the same level for similar ships,but there is obvious difference for different types of ships. Therefore,it is concluded 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.
【Fund】: 国家自然科学基金(51179157);; 陕西省教育厅专项科研计划项目(2012JK0493);; 西安邮电大学青年教师科研基金(ZL2013-20 ZL2013-21)
【CateGory Index】: U674.70
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