Improved LMD, Permutation Entropy and Optimized K-Means to Fault Diagnosis for Roller Bearings

TR Number
Date
2016-02-25
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract

A novel bearing vibration signal fault feature extraction and recognition method based on the improved local mean decomposition (LMD), permutation entropy (PE) and the optimized K-means clustering algorithm is put forward in this paper. The improved LMD is proposed based on the self-similarity of roller bearing vibration signal extending the right and left side of the original signal to suppress its edge effect. After decomposing the extended signal into a set of product functions (PFs), the PE is utilized to display the complexity of the PF component and extract the fault feature meanwhile. Then, the optimized K-means algorithm is used to cluster analysis as a new pattern recognition approach, which uses the probability density distribution (PDD) to identify the initial centroid selection and has the priority of recognition accuracy compared with the classic one. Finally, the experiment results show the proposed method is effectively to fault extraction and recognition for roller bearing.

Description
Keywords
improved local mean decomposition, permutation entropy, optimizes K-means, fault extraction and recognition
Citation
Shi, Z.; Song, W.; Taheri, S. Improved LMD, Permutation Entropy and Optimized K-Means to Fault Diagnosis for Roller Bearings. Entropy 2016, 18, 70.