机电控制带式无级变速器的改进PID速比控制与仿真.pdf

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1、机床与液压Dec．2013HydromechatronicsEngineeringVol_41No．24DOI：10．3969／j．issn．100l-3881．2013．24．002AnImprovedPIDAlgorithmfortheSpeedRatioControlandSimulationofElectro—MechanicalContinuouslyVariableTransmissionCHENGYue“，，WUJunyi，LIXin，J．a．KeyLaboratoryofManuf

2、actureandTestTechniquesforAutomobileParts，MinistryofEducation；b．SchoolofVehicleEngineering，ChongqingUniversityofTechnology，Chongqing400054，China；2．ChongqingAcademyofScienceandTechnology，Chongqing401123，ChinaAbstract：Structuralcharacteristicsandworking

3、principleofthenovelElectro-MechanicalContinu-ouslyVariableTransmission(EM-CVT)areintroduced，Mathematicalmodelsofspeedratio，clampingforceandadjustable．speedmotorareestablishedandEM-CVTspeedratiocentrelstrat—egyisresearched．Aimingatthesho~comingofgenera

4、lPIDratiocontrolalgorithmforelectro。mechanicalcontinuouslyvariabletransmission．theconventionalPIDspeedratiocentrelalgorithmisimprovedandanovelPIDspeedratiocontrolalgorithmissimulatedandanalyzedinEM-CVTcomputermodelwhichisestablishedinMatlab／Simulink．T

5、hetargetspeedratioofEM—CVTsim—ulatehighspeedratiochangerate(1argedeviation)andzerospeedratiochangerate(1ittledevi-ation)byvaryingstep．TheresultsprovethattheimprovedPIDspeedratiocontrolalgorithmpos。sessesgoodcontrolperformanceandtheactualratioavoidssho

6、ck，hysteresisandovershootef_ficiently．Keywords：electro．mechanicalcontinuouslyvariabletransmission，speedratiocontrol，PIDEM．CVTwhichhasapureElectro—Mechanicalcorn-1．IntroductionDonentandcontrolmethodabandonsthelowefficienthydraulicsystem，Itsimplifiesthe

7、structurewithaThisarticlewillintroduceanovelelectro．me—significantdegreeanditscosthasfallenbymorethanchanicalcontinuouslyvariabletransmissionwhichis30％．Also．EM—CVTimprovesthereliabilityanddifferentfromtraditionalcontinuouslyvariabletrans—theefficiency

8、ofthewholedrivetrain．missioninstructure，workingprincipleandcontrolThisarticleanalyzesthestructureandprinciplemethod．ResearchshowsthatinametalbeltCVT’s0fEM．CVT．establishesspeedratiomodel，clampingenergyloss，thehydraulicsystemaccountsforaboutf0rc