Sparsity guided empirical wavelet transform for fault diagnosis of rolling element bearings

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

221 Scopus Citations
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Author(s)

  • Dong Wang
  • Yang Zhao
  • Cai Yi
  • Kwok-Leung Tsui
  • Jianhui Lin

Detail(s)

Original languageEnglish
Pages (from-to)292-308
Journal / PublicationMechanical Systems and Signal Processing
Volume101
Online published23 Sept 2017
Publication statusPublished - 15 Feb 2018

Abstract

Rolling element bearings are widely used in various industrial machines, such as electric motors, generators, pumps, gearboxes, railway axles, turbines, and helicopter transmissions. Fault diagnosis of rolling element bearings is beneficial to preventing any unexpected accident and reducing economic loss. In the past years, many bearing fault detection methods have been developed. Recently, a new adaptive signal processing method called empirical wavelet transform attracts much attention from readers and engineers and its applications to bearing fault diagnosis have been reported. The main problem of empirical wavelet transform is that Fourier segments required in empirical wavelet transform are strongly dependent on the local maxima of the amplitudes of the Fourier spectrum of a signal, which connotes that Fourier segments are not always reliable and effective if the Fourier spectrum of the signal is complicated and overwhelmed by heavy noises and other strong vibration components. In this paper, sparsity guided empirical wavelet transform is proposed to automatically establish Fourier segments required in empirical wavelet transform for fault diagnosis of rolling element bearings. Industrial bearing fault signals caused by single and multiple railway axle bearing defects are used to verify the effectiveness of the proposed sparsity guided empirical wavelet transform. Results show that the proposed method can automatically discover Fourier segments required in empirical wavelet transform and reveal single and multiple railway axle bearing defects. Besides, some comparisons with three popular signal processing methods including ensemble empirical mode decomposition, the fast kurtogram and the fast spectral correlation are conducted to highlight the superiority of the proposed method.

Research Area(s)

  • Bearing fault diagnosis, Empirical wavelet transform, Fourier segments, Multiple bearing defects, Railway axle bearings, Sparsity

Citation Format(s)

Sparsity guided empirical wavelet transform for fault diagnosis of rolling element bearings. / Wang, Dong; Zhao, Yang; Yi, Cai et al.
In: Mechanical Systems and Signal Processing, Vol. 101, 15.02.2018, p. 292-308.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review