TrendanalysismethodforacousticemissionsignalsofalowspeedandheavydutyequipmentbasedonLaplacianscore

LIMin;WANGXiaojing;YANGJianhong

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (17) : 94-99.

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PDF(2394 KB)
Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (17) : 94-99.
论文

TrendanalysismethodforacousticemissionsignalsofalowspeedandheavydutyequipmentbasedonLaplacianscore

  • LIMin,WANGXiaojing,YANGJianhong
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Abstract

Acousticemissiontechnologyisoneofcommonlyusedmethodsforconditionmonitoringofalowspeedandheavydutyequipment.Butthekeypointisthattherearemanyfeatureparametersinacousticemissionanalysisandeachsingleparameterhasasensitivityleveltoafault.Hence,itisextremelyimportanttochooseappropriateparameterstoreflectthedegradationtrendindevicestatustrendanalysis.Here,atrendanalysismethodforacousticemissionsignalsofalowspeedandheavydutyequipmentbasedonLaplacianscorewasproposed.Firstly,theimportanceofeachparameterwassortedbytakingtheadvantageoftheclusterinfeaturebetwensamplesbasedonLaplacianmappingprincipleandtheweightedcoefficientofeachparameterwasbtained.AcomprehensiveparameterLAwasobtainedbyfusingseveralparameterswiththeirweightedcoefficients.Thisparametercouldnotonlyreflectthephysicalprocessofacousticemission,butalsohighlighttheactionsofthekeyparameters.Theeffectivenessoftheproposedmethodwasverifiedwiththeactualsignalsofbeltcylinderbearingsinablastfurnace.ThetestresultsshowedthatthenewmethodcanreflectthedegradationtrendofthelowspeedandheavydutybearingseffectivelyandcomprehensiveparameterLAissensitivetofaultseverityofthebearings.

Key words

Laplacianscore / featureselection / acousticemission / lowspeedandheavydutyequipment / trendanalysis

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LIMin;WANGXiaojing;YANGJianhong. TrendanalysismethodforacousticemissionsignalsofalowspeedandheavydutyequipmentbasedonLaplacianscore[J]. Journal of Vibration and Shock, 2014, 33(17): 94-99
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