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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.9 P.1069~1075

http://doi.org/10.1631/jzus.2004.1069


Identification of diesel front sound source based on continuous wavelet transform


Author(s):  HAO Zhi-yong, HAN Jun

Affiliation(s):  College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   haozy@zju.edu.cn

Key Words:  Acoustic signals, Wavelet transform, Diesel engine, Sound source identification


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HAO Zhi-yong, HAN Jun. Identification of diesel front sound source based on continuous wavelet transform[J]. Journal of Zhejiang University Science A, 2004, 5(9): 1069~1075.

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author="HAO Zhi-yong, HAN Jun",
journal="Journal of Zhejiang University Science A",
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publisher="Zhejiang University Press & Springer",
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T1 - Identification of diesel front sound source based on continuous wavelet transform
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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’s 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.

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Reference

[1] Grossmann, A., Morlet, J., 1984. Decomposition of hardy functions into square integrable wavelets of constant shape. Journal on Mathematical Analysis, Society for Industrial and Applied Mathematics, 4:723-736.

[2] Hao, Z., Han, J., 2003. Investigation on noise sources identification of diesel engine by means of acoustic signals Analysis. Chinese Internal Combustion Engine Engineering, 24(5):25-29.

[3] Meyers, S.D., Kelly, B.G., 1996. An introduction to wavelet analysis in oceanography and meterorology: with application to the dispersion of Yanai waves. Mon. Wea. Rev., 121:2858-2866.

[4] Morlet, J., Arens, G., Furgeau, I., Giard, D., 1982. Wave propagation and sampling theory. Geophysics, 2.

[5] Priede , T., 1980. In Search of Origins of Engine Noise(An Historical Review. SAE 800534, p.2039-2069.

[6] Schaberg, P.W., Pride, T., Dutkiewicz, R.K., 1990. Effects of Rapid Pressure Rise on Engine Vibration and Noise. SAE 900013, p.1-13.

[7] Torrence, C., Compo, G.P.A., 1998. Practical guide to wavelet analysis. Bull. Amer. Metero. Soc., 79(1):61-78.

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