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基于DSP的串联式混合动力汽车CAN网络设计.docx

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基于DSP的串联式混合动力汽车CAN网络设计 Abstract ThispaperdiscussesthedesignofaControllerAreaNetwork(CAN)networkforaserieshybridelectricvehicle(HEV)basedonDigitalSignalProcessing(DSP)technology.Thesystemarchitecture,communicationprotocol,messagestructure,andsoftwaredesignarepresented.TheresultsshowthattheDSP-basedCANnetworkisareliableandefficientsolutionforHEVcontrolandcommunication. Introduction SeriesHEVsarebecomingincreasinglypopularduetotheirhighefficiencyandlowemissions.ThecontrolofseriesHEViscomplexduetotheinvolvementofmultiplepowersourcesandcomponents.Arobustandefficientcommunicationnetworkisrequiredforthecontrolandcoordinationofdifferentsubsystems.CANisawidelyusedcommunicationprotocolintheautomotiveindustryduetoitshighreliability,lowcost,andeaseofimplementation.DSPtechnologyhasbeenappliedinvariousaspectsofautomotivecontrolsystemsduetoitshighprocessingpower,flexibility,andlowpowerconsumption. ThispaperpresentsthedesignofaCANnetworkforaseriesHEVbasedonDSPtechnology.Thesystemarchitecture,communicationprotocol,messagestructure,andsoftwaredesignarediscussed. Systemarchitecture ThesystemarchitectureoftheseriesHEVconsistsofabatterypack,anelectricmotor,agenerator,aninternalcombustionengine,andapowerelectronicsmodule.Thepowerelectronicsmoduleincludesaninverter,arectifier,andaDC-DCconverter.Thebatterypackprovidespowertotheelectricmotorandthegenerator,whichconvertsmechanicalenergyfromtheinternalcombustionenginetoelectricalenergyforthebatterypack.Theinvertercontrolstheelectricmotor,whiletherectifiercontrolsthegenerator.TheDC-DCconverterregulatesthevoltagelevelofthebatterypack. TheCANnetworkisusedforcommunicationandcoordinationbetweendifferentsubsystems.Thenetworkconsistsofnodes,eachofwhichhasaDSPcontrollerandaCANtransceiver.Thenodesareconnectedbyatwisted-paircable. Communicationprotocol TheCANprotocolisusedforcommunicationbetweennodes.TheCANprotocolisamessage-basedprotocolinwhichmessagesaretransmittedbetweennodeswithoutacentralcontroller.Theprotocolincludeserrordetectionandcorrectionmec