Volume 30 Issue 5
May  2015
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XIANG Dan, CEN Jian. Method of roller bearing fault diagnosis based on feature fusion of EMD entropy[J]. Journal of Aerospace Power, 2015, 30(5): 1149-1155. doi: 10.13224/j.cnki.jasp.2015.05.016
Citation: XIANG Dan, CEN Jian. Method of roller bearing fault diagnosis based on feature fusion of EMD entropy[J]. Journal of Aerospace Power, 2015, 30(5): 1149-1155. doi: 10.13224/j.cnki.jasp.2015.05.016

Method of roller bearing fault diagnosis based on feature fusion of EMD entropy

doi: 10.13224/j.cnki.jasp.2015.05.016
  • Received Date: 2013-11-20
  • Publish Date: 2015-05-28
  • The limitation of single fault signal for roller bearing fault diagnosis and nonlinear relation of fault features were studied. Starting from theory of information fusion, the method based on feature fusion of empirical mode decomposition (EMD) entropy was proposed using nonlinear dynamics parameters of entropy as features to deal with roller bearing fault diagnosis problem. Firstly, EMD was conducted for original signal, and on the basis of the property of adaptive multi-resolution for the EMD, different entropies of the intrinsic mode function (IMF) signal reconstructed by using the EMD were calculated. Secondly, the information fusion of the state features was further implemented by using the kernel principal component analysis (KPCA) to extract the complementary feature. Finally, the support vector machine (SVM) was employed to diagnose the fault by using the extracted fusion features. The experiment of rolling bearing fault diagnosis shows that the proposed method combines EMD, information entropy theory and strong nonlinear processing of KPAC, so it can be used for roller bearing fault diagnosis.

     

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