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1、CoupledSystemsMechanics,Vol.1,No.1(2012)39-5739Dynamicinteractionanalysisofactivelycontrolledmaglevvehiclesandguidewaygirdersconsideringnonlinearelectromagneticforces121Dong-JuMin,Jun-SeokLeeandMoon-YoungKim*1DepartmentofCivilandEnvironmentalEngineering,SungkyunkwanUniversity,C
2、heoncheon-Dong,Jangan-gu,Suwon440-746,S.Korea2CivilEngineeringTeam,SamsungC&TCorporation,Seoch02-Dong,Seocho-Gu,Seoul137-956,S.Korea(ReceivedJanuary19,2012,RevisedFebruary27,2012,AcceptedMarch5,2012)Abstract.Thisstudyintendstoexploredynamicinteractionbehaviorsbetweenactivelycon
3、trolledmaglevvehicleandguidewaygirdersbyconsideringthenonlinearformsofelectromagneticforceandcurrentexactly.Forthis,governingequationsforthemaglevvehiclewithtendegreesoffreedomarederivedbyconsideringthenonlinearequationofelectromagneticforce,surfaceirregularity,andthedeflection
4、oftheguidewaygirder.Next,equationsofmotionoftheguidewaygirder,basedonthemodesuperpositionmethod,areobtainedbyapplyingtheUTM-01controlalgorithmforelectromagneticsuspensiontomakethemaglevvehiclesystemstable.Finally,thenumericalstudiesundervariousconditionsarecarriedouttoinvestiga
5、tethedynamiccharacteristicsofthemaglevsystembasedonconsiderationofthelinearandnonlinearelectromagneticforces.Fromnumericalsimulation,itisobservedthatthedynamicresponsesbetweennonlinearandlinearanalysismakelittledifferenceinthestableregion.Butunstableresponsesinnonlinearanalysis
6、underpoorconditionscansometimesbeobtainedbecausethenominalair-gapistoosmalltocontrolthemaglevvehiclestably.However,itisdemonstratedthatthisunstablephenomenoncanberemovedbymakingthenominalair-gaprelatedtoelectromagneticforcelarger.Consequentlyitisjudgedthatthenonlinearanalysisme
7、thodconsideringthenonlinearequationsofelectromagneticforceandcurrentcanprovidemorerealisticsolutionsthanthelinearanalysis.Keywords:maglev;guideway;dynamicinteraction;electromagneticsuspension(ems);activecontrol;surfaceirregularity1.IntroductionResearchonthemaglevvehiclesystemha
8、sbeenprevalentsincethe1970sbecauseofthesuperiorexperie
