车载can总线网络通信性能与电磁干扰问题的分析

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1、重庆大学硕士学位论文II英文摘要ABSTRACTElectroniccontrolunitsareconnectedtothevehiclecontrollerviaCANBusintheelectricvehicle.ThemotordrivesystemandtheDC/DCconverterarethemajorinterferencesourcesinsidethecar.Duetothebundledwiringharness,includingthecontrollinesofCANcontroller,theelectromagneti

2、cinterference(EMI)generatedbytheprementionedinterferencesourcecanimpacttheCAN-bustransmissionline.InordertostudytheimpactoftheinteriorEMIontheCAN-bus,itisnecessarytostudythecommunicationperformanceandEMIproblemsofCAN-busfirst.ThisthesissupportedbytheNationalNaturalScienceFounda

3、tionofChina,"EMCbasicresearch，theelectromagneticenvironmentanalysisandoptimizationinthehighvoltagesystemsofelectricvehicle"（No51177183）,studiesonthecommunicationperformanceandproblemsrelatedtoelectromagneticinterferenceofin-vehicleCANBus,themainresearchcontentsareasfollowing:①G

4、iveabriefintroductionandanalysisofbasicnormsofCAN-bus,includinglayeredstructure、messagetypeandcommunicationmechanismetc.HaveagoodunderstandingofthecommunicationmechanismofCAN-busonthisbasis.ThethesisputsforwardasimplemethodofbuildingaCAN-busnodecommunicationnetwrokinMatlabusing

5、Simulinkblocks.ThedesignedcommunicationmodelreflectsthetransferconditionsofCAN-bus,andachievesthefunctionofcommunicationbetweenelectronicnodes.Thesimulationresultsshowthatthismodelcanbeusedasthebusperformanceanalysistool.Thethsisalsodoessomesimpleresearchesontherandomanalysisof

6、messageresponsetime.②Comparetheimpactonharnesscrosstalkofunshieldedtwistedpaircablesandshieldedtwistedpaircables,usingsimulationmeathod,byanalyzingthescatteringparameters.Anddiscussthecrosstalkbetweensinglelineandtwistedpaircableonthebasisofstudyingthemulti-conductortransmissio

7、nlinetheoryandtheroyofcrosstalk.Thenverifythefeasibilityofusingcascadetransmissionlinemodeltocalculatethetwisted-paircrosstalkbycomparingthecalculationandsimulationresultofthetwisted-paircrosstalk.③Thisthesisprovidesapreventivemethodagainstunauthorizeddatatransmissionproblemswh

8、ichmayariseduringtheCAN-buscommunicationprocess.Thecha