电动助力转向系统故障诊断技术设计

()20081291Jan.2008Vol.29No.1JOURNALOFJIANGSUUNIVERSITY(NaturalScienceEdition),,(,212013):(EPS),,.,,,,.,,,.:,.:;;;;;:U463.6:A:1671-7775(2008)01-0021-04TroublediagnoseofelectricpowersteeringsystemZHENGRong2liang,LIUZhong2liang,CHENLong(SchoolofAutomobileandTrafficEngineering,JiangsuUniversity,Zhenjiang,Jiangsu212013,China)Abstract:ThepossibletroublesofthemainpartsinElectricPowerSteeringSystem(EPS)wasdiscussedandanalyzed.Accordingtothepractice,theoverheatofthemotorwasalsoregardedasaproblem.Hard2warecircuitswereusedtodiagnosethetroubleofthetorquesensor,therelay,andtheclutch.Theresultwassenttothesinglechipprocessor.Thesystemdidnotdealwithsuchunrecoverablefailure,butonlygavethetroublecodeandwarning.Bymonitoringthesysteminsitu,apreventivemeasurewasintroducedtodealwiththeoverheatofthemotor.Themeasureincludesestablishingthermalcoefficientandelectriccircuitofover2currentprotection.Thetestresultshowsthatbycombinationhardwareandsoftware,thede2signcandiagnoseandprocessthecommontroublescorrectly,andpreventthemotorfromoverheating.Keywords:vehicle;electricpowersystem;troublesdiagnose;overcurrent;overheat;protectiveelectriccircuit:2007-06-26:(50475121):(1945),,,([e-mail]),.(1983),,,([e-mail]),.,,.[1,2].,.[3],,.[4](UIO),,.[5](PHA)(DFMEA),,.22()29,,,,.,,.17:;;;;.[6],,EPS.1.1,+5V[1].,+5V..1.2,H.,,H.H,.1.1Fig.1ElectriccircuitofrelaytroubledetectionHR4,R5LM311,LM311R2,R3+2.5V,,H,+12V,LM311;H0,LM311.LM311,,1.1Tab.1TruthvaluetableofrelaytroublejudgmentLM31111100100,,;[7].,.,2.2Fig.2ElectriccircuitofclutchtroubledetectionL1,L11(R4).L1R4LM311,R2,R3+0.45V.0.45A,LM311;0.45A,LM311,,,2.2Tab.2TruthvaluetableofclutchtroublejudgmentLM311111001001:231.3,,,,[1],.,,,,,,,.,.PWM,PWM.PWM:00HA0H,A0HC0H,C0HFFH,1PWM,PWM00HA0H,11,PWMB0HC0H,1,PWMC0HFFH,11,1FFH,2,21,180H,,210H,2,.2,.3.2,PWM1,2FFH,PWM0.45,,.,,3.3Tab.3Thermalcoefficient(10)(16)25511573254116742531167425211775251117756253FE5254FE4255FF3255FF2255FF1255FF0255FF3Fig.3Flowchartofovercurrentprotection2,.,,.,,,.,EPS[8]4.4Fig.4ElectriccircuitofovercurrentprotectionLM311,,H.H,0.005,.24()29LM311,,LM311,.,LM311,,,,,,LM311,.,.,.5LM311().5LM311Fig.5VoltagewavefromLM311whenovercurrentprotectionisplayingrole3,,,,.6.6Fig.6Comparisonofmotorscurrent,10s30A,30A10s,21s,,,3min,180s,15A,,30A.,.4(1).(2),,.(References)[1].[J].,2005,5(4):30-35.YEHong2di.Faultdiagnosisofelectricpowersteeringsystem[J].JournalofZhejiangIndustry&Tradepoly2technic,2005,5(4):30-35.(inChinese)[2]NakayamaT,SudaE.Thepresentandfutureofelectricpower2assistedsteering[J].IntJofvehicleDesign,1994,15(3,4,5):243-254.[3].[D].:,2006.[4]VijayNarayanan,GiorgioRizzoni.Faultdagnosisofsteeringsystemforadvancedvehiclecontrolsystems[J].SAEPaper,1998,107:1134-1139.[5]SanketAmberkar,MarkKushion,KirtEschtruth,etal.Delphiautomotivesystems,diagnosticdevelopmentforanelectricpowersteeringsystem[J].SAEPaper,2000,109:1112-1116.[6]YasuoShimizu,ShitakeKawai.Developmentofeclectricpowersteering[J].SAE,1991,100:1-15.[7],,,.[J].:,2005,26(4):304-307.HERen,XUYong2gang,MIAOLi2dong,etal.Energysavingforelectromagneticclutchinelectricpowersteer2ingsystem[J].JournalofJiangsuUniversity:NaturalScienceEdition,2005,26(4):304-307.(inChi2nese)[8],.[J].:,2004,25(3):221-223.ZHENGRong2liang,ZHUAi2ping.Logiccontrolcircuitusedinelectricpower2assistedsteeringsystem[J].JournalofJiangsuUniversity:NaturalScienceEdition,2004,25(3):221-223.(inChinese)()