Cargando…

Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features

Among the existing bearing faults, ball ones are known to be the most difficult to detect and classify. In this work, we propose a diagnosis methodology for these incipient faults’ classification using time series of vibration signals and their decomposition. Firstly, the vibration signals were deco...

Descripción completa

Detalles Bibliográficos
Autores principales: Mezni, Zahra, Delpha, Claude, Diallo, Demba, Braham, Ahmed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9497772/
https://www.ncbi.nlm.nih.gov/pubmed/36141137
http://dx.doi.org/10.3390/e24091251
_version_ 1784794589169713152
author Mezni, Zahra
Delpha, Claude
Diallo, Demba
Braham, Ahmed
author_facet Mezni, Zahra
Delpha, Claude
Diallo, Demba
Braham, Ahmed
author_sort Mezni, Zahra
collection PubMed
description Among the existing bearing faults, ball ones are known to be the most difficult to detect and classify. In this work, we propose a diagnosis methodology for these incipient faults’ classification using time series of vibration signals and their decomposition. Firstly, the vibration signals were decomposed using empirical mode decomposition (EMD). Time series of intrinsic mode functions (IMFs) were then obtained. Through analysing the energy content and the components’ sensitivity to the operating point variation, only the most relevant IMFs were retained. Secondly, a statistical analysis based on statistical moments and the Kullback–Leibler divergence (KLD) was computed allowing the extraction of the most relevant and sensitive features for the fault information. Thirdly, these features were used as inputs for the statistical clustering techniques to perform the classification. In the framework of this paper, the efficiency of several family of techniques were investigated and compared including linear, kernel-based nonlinear, systematic deterministic tree-based, and probabilistic techniques. The methodology’s performance was evaluated through the training accuracy rate (TrA), testing accuracy rate (TsA), training time (Trt) and testing time (Tst). The diagnosis methodology has been applied to the Case Western Reserve University (CWRU) dataset. Using our proposed method, the initial EMD decomposition into eighteen IMFs was reduced to four and the most relevant features identified via the IMFs’ variance and the KLD were extracted. Classification results showed that the linear classifiers were inefficient, and that kernel or data-mining classifiers achieved [Formula: see text] classification rates through the feature fusion. For comparison purposes, our proposed method demonstrated a certain superiority over the multiscale permutation entropy. Finally, the results also showed that the training and testing times for all the classifiers were lower than 2 s, and 0.2 s, respectively, and thus compatible with real-time applications.
format Online
Article
Text
id pubmed-9497772
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-94977722022-09-23 Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features Mezni, Zahra Delpha, Claude Diallo, Demba Braham, Ahmed Entropy (Basel) Article Among the existing bearing faults, ball ones are known to be the most difficult to detect and classify. In this work, we propose a diagnosis methodology for these incipient faults’ classification using time series of vibration signals and their decomposition. Firstly, the vibration signals were decomposed using empirical mode decomposition (EMD). Time series of intrinsic mode functions (IMFs) were then obtained. Through analysing the energy content and the components’ sensitivity to the operating point variation, only the most relevant IMFs were retained. Secondly, a statistical analysis based on statistical moments and the Kullback–Leibler divergence (KLD) was computed allowing the extraction of the most relevant and sensitive features for the fault information. Thirdly, these features were used as inputs for the statistical clustering techniques to perform the classification. In the framework of this paper, the efficiency of several family of techniques were investigated and compared including linear, kernel-based nonlinear, systematic deterministic tree-based, and probabilistic techniques. The methodology’s performance was evaluated through the training accuracy rate (TrA), testing accuracy rate (TsA), training time (Trt) and testing time (Tst). The diagnosis methodology has been applied to the Case Western Reserve University (CWRU) dataset. Using our proposed method, the initial EMD decomposition into eighteen IMFs was reduced to four and the most relevant features identified via the IMFs’ variance and the KLD were extracted. Classification results showed that the linear classifiers were inefficient, and that kernel or data-mining classifiers achieved [Formula: see text] classification rates through the feature fusion. For comparison purposes, our proposed method demonstrated a certain superiority over the multiscale permutation entropy. Finally, the results also showed that the training and testing times for all the classifiers were lower than 2 s, and 0.2 s, respectively, and thus compatible with real-time applications. MDPI 2022-09-05 /pmc/articles/PMC9497772/ /pubmed/36141137 http://dx.doi.org/10.3390/e24091251 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mezni, Zahra
Delpha, Claude
Diallo, Demba
Braham, Ahmed
Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features
title Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features
title_full Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features
title_fullStr Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features
title_full_unstemmed Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features
title_short Performance of Bearing Ball Defect Classification Based on the Fusion of Selected Statistical Features
title_sort performance of bearing ball defect classification based on the fusion of selected statistical features
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9497772/
https://www.ncbi.nlm.nih.gov/pubmed/36141137
http://dx.doi.org/10.3390/e24091251
work_keys_str_mv AT meznizahra performanceofbearingballdefectclassificationbasedonthefusionofselectedstatisticalfeatures
AT delphaclaude performanceofbearingballdefectclassificationbasedonthefusionofselectedstatisticalfeatures
AT diallodemba performanceofbearingballdefectclassificationbasedonthefusionofselectedstatisticalfeatures
AT brahamahmed performanceofbearingballdefectclassificationbasedonthefusionofselectedstatisticalfeatures