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1、AdaptronicVibrationDampingforMachineTools1212A.Ast,S.Braun,P.Eberhard,U.Heisel(1)1InstituteofEngineeringandComputationalMechanics,UniversityofStuttgart,Germany2InstituteforMachineTools,UniversityofStuttgart,GermanyAbstractAnewlydesignedadaptroniccompon
2、entwithapowerfulpiezo-stackactuatorforactivedampingofmachinevibrationsispresentedinthispaper.Especiallyformachinetoolswithparallelkinematics,whichfeaturelightweightstructuresandwhicharebuiltinordertoobtainhighprocessingspeeds,theactivedampingofmachinev
3、ibrationsisimportanttoachievethedesiredsystemperformance.Extensivesimulationstudieswithflexiblemultibodysystemsinordertotestdifferentcontrolalgorithmssuchasdissipativecontrol,integratedforcefeedbackorH2/H∞controlandrecentexperimentalresultsshowthehighp
4、otentialtoimprovethesystembehavior.Keywords:Machine,Vibration,AdaptronicActuator1INTRODUCTIONordertodampthevibrations.ToachieveasufficientThestaticanddynamicflexibilityofamachinetoolisbehavior,theactuatormustbecapableofwithstandingoftenthemajorlimiting
5、factorforthemachiningquality,dynamictensileaswellascompressionforcesresultingespeciallyifhighprocessingspeedsaswellashighfrommovementsoftheaxesandprocessforces.accuraciesaredesired.ConstructivemeasuresaloneareSimulationswiththelater-described,flexiblem
6、ultibodyoftennotsufficientanymoreinordertodealwiththesesystemmodelshowedthattheseforcesdonotexceedconflictingdemands.Activecontrolofmachinetool4.5kN.Furthermore,amodalreductionprovidesthevibrationsbymeansofadaptronicorsmartcomponentsnaturalfrequencyand
7、modalmassoftheconsideredopensupnewpossibilitiestofurtherpushthelimitsinthepivotingeigenmode,sothatthedynamicforcesactinginmachinetooldevelopment.therodcanbecalculatedasIncontrasttocontrolconceptsthataddresstheproblem22offlexibilitiesinmachinetoolsbyada
8、ptingthepositionFdyn=ê4pmeffuf,(1)controlsystemasforexamplein[1]and[2],adaptronicactuatorsthatareintegratedintothesystemstructurewheremeffistheeffectivemasscoupledtotherod,uisopenupadditionaldegreesoffreedomfortheengineertothedesiredstr
