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Application of Time-Frequency Representation Techniques to the Impact-Induced Noise and Vibration from Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
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Either for diagnostics purposes or NVH improvement efforts in vehicle development, it will be necessary to have both timing and spectral contents information from measured sound or vibration data. It will become especially important when the sound or vibration is induced from the impact mechanism in automotive engines, such as valve train, piston, or fuel injector etc.
In this study, we will review several approaches of time-frequency representation, like Wavelet Transform, Wigner-Ville Distribution and Short-Time Fourier Transform, with their properties in view of application to practical development engineering.
These techniques have been applied to practical development examples in order to identify the characteristics of the impact-induced sound and vibration [1, 9]. From the valve train noise study, it was possible to separate valve seating noise at the time of valve closing, and valve opening noise during valve opening period.
CitationSuh, I., "Application of Time-Frequency Representation Techniques to the Impact-Induced Noise and Vibration from Engines," SAE Technical Paper 2002-01-0453, 2002, https://doi.org/10.4271/2002-01-0453.
- Suh I. S. “An Investigation of sound Quality of I. C. Engines,” Massachusetts Institute of Technology 1998
- Oppenheim A. V. Schafer R. W. Discrete-Time Signal Processing Prentice-Hall International Inc. 1989
- Classen T. Mecklenbrauker W. The Wigner distribution - A tool for time-frequency signal analysis Part 1: Continuous-time signals Philips Journal of Research 35 3 1980
- Classen T. Mecklenbrauker W. The Wigner distribution - A tool for time-frequency signal analysis Part 2: Discrete-time signals Philips Journal of Research 35 3 1980
- Gade S. Gram-Hansen K. The analysis of nonstationary signals, Sound and Vibration 30th Anniversary Issue January 1997
- Wahl T. J. Bolton J. S. The use of Wigner distribution to identify wave-types in multi-element structures Society of Automotive Engineers 931286 1993
- Daubechies I. Ten lectures on Wavelets SIAM 1992
- Suh I. S. Lyon R. H. An investigation of valve train noise for the sound quality of I. C. engines Society of Automotive Engineers, 1999-01-1711 1999