Multi-Scale Permutation Entropy Based on Improved LMD and HMM for Rolling Bearing Diagnosis

被引：140
作者：
Gao, Yangde [1 ]
Villecco, Francesco [2 ]
Li, Ming [3 ,4 ]
Song, Wanqing [1 ]
机构：
[1] Shanghai Univ Engn Sci, Sch Elect & Elect Engn, Joint Res Lab Intelligent Percept & Control, 333 Long Teng Rd, Shanghai 201620, Peoples R China
[2] Univ Salerno, Dept Ind Engn, Via Giovanni Paolo 2 132, I-84084 Fisciano, Italy
[3] East China Normal Univ, Sch Informat Sci & Technol, Shanghai 200241, Peoples R China
[4] Zhejiang Univ, Ocean Coll, Hangzhou 316021, Zhejiang, Peoples R China
来源：
ENTROPY | 2017年 / 19卷 / 04期
基金：
中国国家自然科学基金;
关键词：
improved LMD; multi-scale permutation entropy; MI; FNN; delay time; embedding dimension; HMM; back-propagation (BP); bearing fault diagnosis; FAULT-DIAGNOSIS; DECOMPOSITION; MACHINES; MODEL;
D O I：
10.3390/e19040176
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Based on the combination of improved Local Mean Decomposition (LMD), Multi-scale Permutation Entropy (MPE) and Hidden Markov Model (HMM), the fault types of bearings are diagnosed. Improved LMD is proposed based on the self-similarity of roller bearing vibration signal by extending the right and left side of the original signal to suppress its edge effect. First, the vibration signals of the rolling bearing are decomposed into several product function (PF) components by improved LMD respectively. Then, the phase space reconstruction of the PF1 is carried out by using the mutual information (MI) method and the false nearest neighbor (FNN) method to calculate the delay time and the embedding dimension, and then the scale is set to obtain the MPE of PF1. After that, the MPE features of rolling bearings are extracted. Finally, the features of MPE are used as HMM training and diagnosis. The experimental results show that the proposed method can effectively identify the different faults of the rolling bearing.
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页数：10
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