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1、Mechatronics17(2007)73–91qModellingofanautomatedmanualtransmissionsystemGianlucaLucente,MarcelloMontanari*,CarloRossiCASY–CenterforResearchonComplexAutomatedSystems‘‘G.Evangelisti’’,DepartmentofElectronics,ComputerandSystemSciences(DEIS),UniversityofBologna,
2、VialePepoli3/2,40123Bologna,ItalyReceived21September2005;accepted10November2006AbstractVehicleswithautomatedmanualtransmissions(AMT)forgearshiftcontroloffermanyadvantagesintermsofreductionoffuelcon-sumptionandimprovementofdrivingcomfortandshiftingquality.Comp
3、lexity,nonlinearityandhigh-orderdynamicsoftheautomateddriveline,combinedwithstrictrequirementsforhighperformancegearshifts,demandthedevelopmentofdrivelinemodels,whichincludeadetaileddescriptionoftheactuators.Thesemodelscanbeusefulfordifferentpurposes:(a)durin
4、gsystemdevelopment,toeval-uatetheachievableperformanceanditsdependencyonsystemproperties;(b)assimulationtoolsforgearshiftcontrolalgorithmdesign.Inthispaper,physically-baseddetailednonlinearmodelsoftheelectro-hydraulicactuatedgearboxandofthedryclutchelectro-h
5、ydrau-licactuatorofanautomatedmanualtransmissionaredeveloped.Inordertoanalyzetheirbehaviorandtheirimpactonthedrivetrainduringgearshifts,actuatormodelsareintegratedwithasimplifiedtransmissionshaftsdynamics.Areduced-ordermodelofthegearboxactuator,whichisvalidwh
6、endithersignalisimposedtoservovalves,isdevelopedwiththeaimofanalyzingitspropertiesandperformances.Modelparameteridentificationhasbeenperformedmostlybymeansoftheoreticalrelationsanddesigndata.Experimentaltests,performedonacommercialcar,confirmthattheproposedmod
7、elisabletodescribetheactuatorsbehaviorandthemainphenomenacharacterizingsystemdynamicsduringgearshift.Ó2006ElsevierLtd.Allrightsreserved.Keywords:Automatedmanualtransmission;Modelling;Automotive;Electro-hydraulicsystems;Singularperturbationmethod1.Introductio
8、nspreadinginthelastyears,mostlyintheEuropeancarmarket.AutomatictransmissioncontrolrepresentsoneoftheAnAMTisgenerallyconstitutedbyadryclutchandakeyelementsfortheimprovementofvehiclesafety,com-mul
