Discrete Wavelet Transform for Fault Diagnosis of Rolling Element Bearing

Vijay, G S and Pai, Srinivasa P and Sriram, N S (2011) Discrete Wavelet Transform for Fault Diagnosis of Rolling Element Bearing. In: Proceedings of the National Conference on Advances in Mechanical Engineering , Jan 3rd – 5th, Manipal Institute of Technology, Manipal.

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Abstract

Fast Fourier Transform (FFT) and Discrete Wavelet Transform (DWT) are used to diagnose faults in Rolling Element Bearing (REB) in this paper. Raw vibration signals (acceleration) acquired from normal and faulty (Inner Race (IR) fault and Outer Race (OR) fault) bearings are analyzed with FFT and DWT. It is found that the impulses appear periodically with a time period corresponding to characteristic fault frequencies. The characteristic fault frequencies not detectable by FFT are prominently identified by DWT. The energies of DWT coefficients of IR fault and OR fault are higher than those of normal bearing. The energy and kurtosis values of the DWT coefficients can be used as effective indicators for identifying faults in REB. Results show that DWT can be used effectively in fault diagnosis of REB.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: fault diagnosis; rolling element bearing; discrete wavelet transforms
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 25 Mar 2013 04:49
Last Modified: 25 Mar 2013 04:49
URI: http://eprints.manipal.edu/id/eprint/79253

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