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Journal of Mechanical Science and Technology

, Volume 33, Issue 4, pp 1535–1543 | Cite as

A novel rolling-element bearing faults classification method combines lower-order moment spectra and support vector machine

  • Qinyu Jiang
  • Faliang ChangEmail author
Article

Abstract

Rolling-element bearings (REBs) faults are one of the most common breakdowns of rotating machines, thus proposing effective bearing fault diagnosis and classification methods is vital. In previous studies, lots of bearing fault classification methods have been proposed to solve the problem in low signal-to-noise ratio (SNR) conditions. Though satisfactory classification results have been obtained, in consideration of the practicability and application scenarios, there are still many aspects to improve, such as the complexity of method and the classification ability in lower SNR conditions. Therefore, this paper presents a novel method that combines lower-order moment spectrum with support vector machine (SVM) for bearing fault classification in low SNR conditions. The lower-order moment spectrum reduces influence of Gaussian noise and enhances the quality of fault feature. A bandpass filter group (BPFG) has been used to reduce the dimension of the lower-order moment spectra (LOMS) as feature vectors. And a following SVM has been applied as the fault classifier, due to the mature application and satisfactory performance in fault classification. The proposed method is demonstrated to have strong ability of classification in low SNR conditions experimentally.

Keywords

Bearing fault Fault diagnosis Lower-order moment spectra Support vector machine (SVM) 

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Copyright information

© KSME & Springer 2019

Authors and Affiliations

  1. 1.School of Control Science and EngineeringShandong UniversityJi’nanChina

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