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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2004, Vol. 5 Issue ( 9): 8-    DOI: 10.1631/jzus.2004.1069
    
Identification of diesel front sound source based on continuous wavelet transform
HAO Zhi-yong, HAN Jun
College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China; School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
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Abstract  Acoustic signals from diesel engines contain useful information but also include considerable noise components. To extract information for condition monitoring purposes, continuous wavelet transform (CWT) is used for the characterization of engine acoustics. This paper first reviews CWT characteristics represented by short duration transient signals. Wavelet selection and CWT are then implemented and wavelet transform is used to analyze the major sources of the engine front?ˉs exterior radiation sound. The research provides a reliable basis for engineering practice to reduce vehicle sound level. Comparison of the identification results of the measured acoustic signals with the identification results of the measured surface vibration showed good agreement.

Key words： Mechanical,Acoustic signals      Wavelet transform      Diesel engine      Sound source identification     
Received: 16 May 2003     
CLC:  TB53  
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HAO Zhi-yong
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Cite this article:

HAO Zhi-yong, HAN Jun. Identification of diesel front sound source based on continuous wavelet transform. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2004, 5( 9): 8-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2004.1069     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2004/V5/I 9/8

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