• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2021, Vol. 57 ›› Issue (21): 138-149.doi: 10.3901/JME.2021.21.138

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Application of SVD Based on Correlated Singular Value Ratio in Bearing Fault Diagnosis

LI Hua1,2, LIU Tao2, WU Xing2,3, LI Shaobo1   

  1. 1. State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025;
    2. Yunnan Provincial Key Laboratory of Advanced Equipment Intelligent Manufacturing Technology, Kunming University of Science and Technology, Kunming 650500;
    3. Yunnan Vocational College of Mechanical and Electrical Technology, Kunming 650203
  • Received:2020-10-14 Revised:2020-12-28 Online:2021-11-05 Published:2021-12-28

Abstract: The SVD method based on Hankel matrix is widely used in signal processing and fault diagnosis. Its noise reduction performance is affected by the selected reconstruction component, the structure of the Hankel matrix, and the number of points of the analysis data. Based on this, a systematic research is carried out, and the SVD based on correlated singular value ratio (C-SVR SVD) is proposed, and successfully applied to bearing fault diagnosis. First, for the problem of determining the reconstruction components of SVD, a method combining singular value ratio (SVR) and cross-correlation coefficient is proposed; secondly, the structure of Hankel matrix is studied, and a structure optimization method based on SVR and kurtosis indicator is proposed. The structure optimization method of the indicator. Then, the number of analyzed data points was analyzed and discussed, and constraints were given. Finally, the C-SVR SVD method is applied to the analysis of the bearing fault simulation signal and the actual bearing fault signal, which verifies the effectiveness and superiority of the C-SVR SVD method.

Key words: singular value decomposition, reconstructed component determination, singular value ratio, cross-correlation coefficient, Hankel matrix structure, rolling bearing

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