CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL

Aiming at the vibration displacement signals of cracked rotors is unstable and non-linear,and the fault features are extracted difficultly,and the sample collection is lacking in the initial stage of fault,the crack fault diagnosis method based on Variational Mode Decomposition and AR model is propo...

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Main Authors: ZHONG ZhiXian, JIAO BoLong, WANG JiaYuan, LIU YiXin, ZHU ChangSheng
Format: Article
Language:zho
Published: Editorial Office of Journal of Mechanical Strength 2020-01-01
Series:Jixie qiangdu
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Online Access:http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.03.002
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author ZHONG ZhiXian
JIAO BoLong
WANG JiaYuan
LIU YiXin
ZHU ChangSheng
author_facet ZHONG ZhiXian
JIAO BoLong
WANG JiaYuan
LIU YiXin
ZHU ChangSheng
author_sort ZHONG ZhiXian
collection DOAJ
description Aiming at the vibration displacement signals of cracked rotors is unstable and non-linear,and the fault features are extracted difficultly,and the sample collection is lacking in the initial stage of fault,the crack fault diagnosis method based on Variational Mode Decomposition and AR model is proposed. A number of Intrinsic Mode Function are obtained by VMD as the preprocessing of the AR model. The AR model for each IMF component is established. The variance of the model parameters and residuals is calculated by the least square method. The model parameters and the variance of the residual are used as the characteristic vector of the system state. From the Mahalanobis distance and setting the corresponding weighted parameters,the synthetic distance is used to diagnose crack fault of rotor. Through the analysis of the experimental data,the feasibility of the fault diagnosis method based on the variational mode decomposition and the AR model are successfully verified,which provides a method for the fault diagnosis of the rotor,and the shortcomings of AR model in the diagnosis of rotor crack fault are overcome.
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institution Kabale University
issn 1001-9669
language zho
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publisher Editorial Office of Journal of Mechanical Strength
record_format Article
series Jixie qiangdu
spelling doaj-art-c64547bf770c43fba56e590dcdf513d02025-01-15T02:27:59ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692020-01-014251652230608121CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODELZHONG ZhiXianJIAO BoLongWANG JiaYuanLIU YiXinZHU ChangShengAiming at the vibration displacement signals of cracked rotors is unstable and non-linear,and the fault features are extracted difficultly,and the sample collection is lacking in the initial stage of fault,the crack fault diagnosis method based on Variational Mode Decomposition and AR model is proposed. A number of Intrinsic Mode Function are obtained by VMD as the preprocessing of the AR model. The AR model for each IMF component is established. The variance of the model parameters and residuals is calculated by the least square method. The model parameters and the variance of the residual are used as the characteristic vector of the system state. From the Mahalanobis distance and setting the corresponding weighted parameters,the synthetic distance is used to diagnose crack fault of rotor. Through the analysis of the experimental data,the feasibility of the fault diagnosis method based on the variational mode decomposition and the AR model are successfully verified,which provides a method for the fault diagnosis of the rotor,and the shortcomings of AR model in the diagnosis of rotor crack fault are overcome.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.03.002Cracked rotorVMDAuto Regressive modelFault diagnosisMahalanobis distance
spellingShingle ZHONG ZhiXian
JIAO BoLong
WANG JiaYuan
LIU YiXin
ZHU ChangSheng
CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL
Jixie qiangdu
Cracked rotor
VMD
Auto Regressive model
Fault diagnosis
Mahalanobis distance
title CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL
title_full CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL
title_fullStr CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL
title_full_unstemmed CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL
title_short CRACK FAULT DIAGNOSIS OF ROTOR BASED ON VMD AND AR MODEL
title_sort crack fault diagnosis of rotor based on vmd and ar model
topic Cracked rotor
VMD
Auto Regressive model
Fault diagnosis
Mahalanobis distance
url http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.03.002
work_keys_str_mv AT zhongzhixian crackfaultdiagnosisofrotorbasedonvmdandarmodel
AT jiaobolong crackfaultdiagnosisofrotorbasedonvmdandarmodel
AT wangjiayuan crackfaultdiagnosisofrotorbasedonvmdandarmodel
AT liuyixin crackfaultdiagnosisofrotorbasedonvmdandarmodel
AT zhuchangsheng crackfaultdiagnosisofrotorbasedonvmdandarmodel