Overview of Time-Frequency Analysis Techniques in Vibration Signals of Rotating Machinery

Abstract:

There is very rich fault information in vibration signals of rotating machineries. The real vibration signals are nonlinear, non-stationary and time-varying signals mixed with many other factors. It is very useful for fault diagnosis to extract fault features by using time-frequency analysis techniques. Recent researches of time-frequency analysis methods including Short Time Fourier Transform, Wavelet Transform, Wigner-Ville Distribution, Hilbert-Huang Transform, Local Mean Decomposition, and Local Characteristic-scale Decomposition are introduced. The theories, properties, physical significance and applications, advantages and disadvantages of these methods are analyzed and compared. It is pointed that algorithms improvement and combined applications of time-frequency analysis methods should be researched in the future.

• Periodical: Applied Mechanics and Materials (Volume 684)
• Pages: 124-130
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.684.124
• Online since: October 2014
• Authors: Hong Li*, Qing He, Zhao Zhang
• Keywords: Nonlinear, Non-Stationary, Time-Frequency Analysis, Time-Varying Signal, Vibration Signal

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