Detection of weak fault using sparse empirical wavelet transform for cyclic fault

  • Yanfei LuEmail author
  • Rui Xie
  • Steven Y. Liang


The successful prediction of the remaining useful life of rolling element bearings depends on the capability of early fault detection. A critical step in fault diagnosis is to use the correct signal processing techniques to extract the fault signal. This paper proposes a newly developed diagnostic model using a sparse-based empirical wavelet transform (EWT) to enhance the fault signal to noise ratio. The unprocessed signal is first analyzed using the kurtogram to locate the fault frequency band and filter out the system noise. Then, the preprocessed signal is filtered using the EWT. The lq-regularized sparse regression is implemented to obtain a sparse solution of the defect signal in the frequency domain. The proposed method demonstrates a significant improvement of the signal to noise ratio and is applicable for detection of cyclic fault, which includes the extraction of the fault signatures of bearings and gearboxes.


Ball bearing Fault diagnosis Sparse matrices Wavelet transforms 


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Author’s contributions

Y.L. and R.X. created the model and analyzed the data; S.Y.L. provided feedback of the concept; Y.L. and R.X. wrote the paper.


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  1. 1.George W. Woodruff School of Mechanical EngineeringGeorgia Institute of TechnologyAtlantaUSA
  2. 2.Department of Statistics at the University of GeorgiaAthensUSA
  3. 3.College of Mechanical Engineering, Donghua UniversityShanghaiChina

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