一種改進的灰色診斷關(guān)聯(lián)度分析方法.pdf

1、中南工業(yè)大學(xué)碩士學(xué)位論文一種改進的灰色診斷關(guān)聯(lián)度分析方法姓名：徐東喜申請學(xué)位級別：碩士專業(yè)：機械設(shè)計及理論指導(dǎo)教師：黃明輝2001.1.1中南大學(xué)碩十學(xué)位論文一種改進的灰色診斷關(guān)聯(lián)度分析方法AbstractThroughhavingstudiedandsynthesizedcurrentdocumentsofsignalsynthesizingandprocessingandthegreytheoryconsideringtheshor

2、tcomingsofexistingmethodoffaultdiagnosisweputnewknowledgeofmathandgreytheoryforwardtothefieldoffaultdiagnosisofrollingelementbearingandgearbox.Thispaperelaboratedthedevelopmentoftechniquestoincreasetheratioofsignaltonois

3、eandintroducednewtechniquestodecreasetheratioofnoisewhichincludesapplyingcepstrumthemethodusingPhasePortraitandsingularvaluedecomposition.Thetextsumeduptheseachievementsoftechniquesandputforwardaimprovingmethodtoincrease

4、theratioofsignaltonoisebasedonLeastSquare.Thismakesitmoreclearlytoembodythecharacterofthesignalobtained.Thetextverifiedtheeffectofthismethodthroughsimulantfiguresandsummedupitsadvantagescompareswithexistingmethods.Thepap

5、erelaboratedthevibratingformsoffaultyrollingelementbearingandthegearboxanditstimedomainparameters，thenapproachedthephysicsignificanceoftheseparameters.Thismakesiteasytoconnectthefaultsofthemachineandthesignalobtained.The

6、paperalsoelaboratedthebasictheoryofthegreytheoryandconstructedthetypicalfaultymodelmatrixofthegreytheory.Accordingtothepoordifferentiationofexistingfaultdiagnosisusinggreytheorythepapersumedupsomeachievementsoffaultdiagn

7、osisandputforwardthemethodstoincreasethedifferentiationlinkingmathematicalknowledgeandgreytheory.StartingwithchoiceofparametersimprovementoftheBOcorrelationpredeterminedparametersofgreytheorytakingmeanoftheparametersadop

8、tingofrelativeparameterandsettingupofthethresholdvaluethepappertriedtoimprovethedifferentiationofthecorrelativeofthegreytheoryThroughthesimulanttestandtestthetextverifiedtheimprovementofthedifferentiationofthecorrelative

9、usingtheabovementionedmethod.ltalsoverfiedincreaseoftheaccuracyofthefaultdiagnosisusinggreytheory.andcomparingtheresultsofthefaultdiagnosiswiththerealisticfaultthepaperverifiesthefeasibilityandpracticabilityoftheproposed