Journal of Shanghai Jiao Tong University (Science) ›› 2018, Vol. 23 ›› Issue (5): 696-701.doi: 10.1007/s12204-018-1965-2

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Fault Diagnosis of Rolling Element Bearing Using Multi-Scale Lempel-Ziv Complexity and Mahalanobis Distance Criterion

Fault Diagnosis of Rolling Element Bearing Using Multi-Scale Lempel-Ziv Complexity and Mahalanobis Distance Criterion

YU Kun (俞昆), TAN Jiwen (谭继文), LIN Tianran (林天然)   

  1. (School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266525, Shandong, China)
  2. (School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266525, Shandong, China)
  • Online:2018-10-01 Published:2018-10-07
  • Contact: LIN Tianran (林天然) E-mail:trlin888@163.com

Abstract: A new fault diagnosis technique for rolling element bearing using multi-scale Lempel-Ziv complexity (LZC) and Mahalanobis distance (MD) criterion is proposed in this study. A multi-scale coarse-graining process is used to extract fault features for various bearing fault conditions to overcome the limitation of the single stage coarse-graining process in the LZC algorithm. This is followed by the application of MD criterion to calculate the accuracy rate of LZC at different scales, and the best scale corresponding to the maximum accuracy rate is identified for fault pattern recognition. A comparison analysis with Euclidean distance (ED) criterion is also presented to verify the superiority of the proposed method. The result confirms that the fault diagnosis technique using a multi-scale LZC and MD criterion is more effective in distinguishing various fault conditions of rolling element bearings.

Key words: fault diagnosis| rolling element bearing| Lempel-Ziv complexity (LZC)| Mahalanobis distance (MD) criterion

摘要: A new fault diagnosis technique for rolling element bearing using multi-scale Lempel-Ziv complexity (LZC) and Mahalanobis distance (MD) criterion is proposed in this study. A multi-scale coarse-graining process is used to extract fault features for various bearing fault conditions to overcome the limitation of the single stage coarse-graining process in the LZC algorithm. This is followed by the application of MD criterion to calculate the accuracy rate of LZC at different scales, and the best scale corresponding to the maximum accuracy rate is identified for fault pattern recognition. A comparison analysis with Euclidean distance (ED) criterion is also presented to verify the superiority of the proposed method. The result confirms that the fault diagnosis technique using a multi-scale LZC and MD criterion is more effective in distinguishing various fault conditions of rolling element bearings.

关键词: fault diagnosis| rolling element bearing| Lempel-Ziv complexity (LZC)| Mahalanobis distance (MD) criterion

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