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A Novel Method for Intelligent Single Fault Detection of Bearings Using SAE and Improved D–S Evidence Theory

1,2,3,4, 1,* and 1,2,3
1
Key Laboratory of Advanced Manufacturing Technology, Ministry of Education, Guizhou University, Guiyang 550025, China
2
State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
3
School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
4
Department of Computer Science, University of Texas Rio Grande Valley, Edinburg, TX 78541, USA
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(7), 687; https://doi.org/10.3390/e21070687
Received: 14 May 2019 / Revised: 6 July 2019 / Accepted: 10 July 2019 / Published: 13 July 2019
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PDF [7871 KB, uploaded 13 July 2019]
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Abstract

In order to realize single fault detection (SFD) from the multi-fault coupling bearing data and further research on the multi-fault situation of bearings, this paper proposes a method based on features self-extraction of a Sparse Auto-Encoder (SAE) and results fusion of improved Dempster–Shafer evidence theory (D–S). Multi-fault signal compression features of bearings were extracted by SAE on multiple vibration sensors’ data. Data sets were constructed by the extracted compression features to train the Support Vector Machine (SVM) according to the rule of single fault detection (R-SFD) this paper proposed. Fault detection results were obtained by the improved D–S evidence theory, which was implemented via correcting the 0 factor in the Basic Probability Assignment (BPA) and modifying the evidence weight by Pearson Correlation Coefficient (PCC). Extensive evaluations of the proposed method on the experiment platform datasets showed that the proposed method could realize single fault detection from multi-fault bearings. Fault detection accuracy increases as the output feature dimension of SAE increases; when the feature dimension reached 200, the average detection accuracy of the three sensors for bearing inner, outer, and ball faults achieved 87.36%, 87.86% and 84.46%, respectively. The three types’ fault detection accuracy—reached to 99.12%, 99.33% and 98.46% by the improved Dempster–Shafer evidence theory (IDS) to fuse the sensors’ results—is respectively 0.38%, 2.06% and 0.76% higher than the traditional D–S evidence theory. That indicated the effectiveness of improving the D–S evidence theory by evidence weight calculation of PCC. View Full-Text
Keywords: Sparse Auto-Encoder (SAE); bearing fault detection; single fault detection (SFD); Dempster–Shafer (D–S) evidence theory Sparse Auto-Encoder (SAE); bearing fault detection; single fault detection (SFD); Dempster–Shafer (D–S) evidence theory
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lu, J.; Zhang, H.; Tang, X. A Novel Method for Intelligent Single Fault Detection of Bearings Using SAE and Improved D–S Evidence Theory. Entropy 2019, 21, 687.

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