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ID:7885453
大小:1.24 MB
页数:167页
时间:2018-03-01
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1、AdaptivePredictiveFeedbackTechniquesforVibrationControlKennethW.EureDissertationsubmittedtotheFacultyoftheVirginiaPolytechnicInstituteandStateUniversityinpartialfulfillmentoftherequirementsforthedegreeofDoctorofPhilosophyinElectricalEngineeringWilliamBaumann,ChairJer-NanJuangRichardSilcoxChrisF
2、ullerHughVanLandinghamFebruary3,1998Blacksburg,VirginiaKeywords:Feedback,Adaptive,RealTime,BroadbandCopyright1998,KennethW.EureAdaptivePredictiveFeedbackTechniquesforVibrationControlKennethW.Eure(ABSTRACT)Inthisdissertation,adaptivepredictivefeedbackcontrolisusedtosuppressplatevibrations.Theada
3、ptivepredictivecontrollerconsistsofanon-lineidentificationtechniquecoupledwithacontrolscheme.Varioussystemidentificationtechniquesareinvestigatedandimplementedincludingbatchleastsquares,projectionalgorithm,andrecursiveleastsquares.ThecontrolalgorithmsusedincludeGeneralizedPredictiveControlandDe
4、adbeatPredictiveControl.Thisdissertationcombinessystemidentificationandcontroltoregulatebroadbanddisturbancesinmodally-densestructures.Asitisassumedthatthesystemtoberegulatedisunknownortimevarying,thecontrolschemespresentedinthisworkhavetheabilitytoidentifyandregulateaplantwithonlyaninitialesti
5、mateofthesystemorder.Inaddition,theoreticaldevelopmentandexperimentalresultspresentedinthisworkconfirmthefactthatanadaptivecontrolleroperatinginthepresenceofdisturbanceswillautomaticallyincorporateaninternalnoisemodelofthedisturbanceperturbingtheplantifthesystemmodelorderischosensufficientlylar
6、ge.Itisalsoshownthattheadaptivecontrollerhastheabilitytotrackchangesinthedisturbancespectrumaswellastrackatimevaryingplantundercertainconditions.Thisworkpresentsabroadbandmulti-inputmulti-outputcontrolschemewhichutilizesboththeDSPprocessorandthePCprocessorinordertohandlethecomputationaldemandof
7、broadbandregulationofamodally-denseplant.Also,thesystemidentificationtechniqueandthecontrolalgorithmmaybecombinedtoproduceadirectadaptivecontrolschemewhichestimatesthecontrolparametersdirectlyfrominputandoutputdata.Experimentalres
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