基于压电致动器的柔性构件振动主动控制技术研究

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1、．沏≥：J～暗。博士学位论文⑧论文题目基王压电塑动墨鲍塞性掏仕关键词：振动主动控制；扭转振动；弯扭耦合振动：遗传算法；优化配置；最优控制；滑模变结构控制．nABSTRACT‘Aimingattheactivevibrationcontrolofspaceflexiblestl-uctllrcsandcomb／nedwiththeNationalNaturalScienceFoudationProject,thetorsionalvibrationofaspaceflexiblebarandthebending-torsional-coupledvibrat

2、ionofatwo-linkflexiblestructurewe'reinvestigatedtheoreticallyandexperimentally．Inchapterone，thebackgroundinformationandsiganiflcaneeofthedissertationwerepresented．Andthentheup-to-dalcresearchstatusoftheflexiblestructureswasgiveninthefollowingaspectswhichalethesystemmodelingofthefl

3、exiblestructures，studiesonthetypicallyflexiblestructures，applicationofsmartmaterials，optimizationplacementoftheactuators／sensorsandconventionalcontrolalgorithmsinactivevibrationcontr01．Atlast,themainresearchcontentofthis．dissertationWaspresented．Inchaptertwo,thepiezoelectricconsti

4、tutiveequationsandtheapplicationofpiezoelectricmaterialswerepresented．ApiezoelectrictorisonalactuatorWasdesignedusingaxialpolingmethod,andtheoutputtorqueoftheactuatorwasderived．Thetorisonalresonant仔equencyofthepiezoelectrictorsionalactuatorwasanalyzedanditsfabricationmethodwasdisc

5、ussed．ThefundamentalofthestraingaugeintestingtorsionalvibrationWaSinvestigatedandtherelationshipbctweanthetorsionalangleandoutputvoltageoftheelectricbridgeWasfounded．Inchapterthree，thetorsionalvibrationoftheflexiblebarWasanalyzed．Aspaceflexiblestructureconsitingofaflexiblebar,apie

6、zoelectrictorsionalactuatorandstraingaugeswasproposed．Aimingattheoptimizationplacementoftheactuator／sensor,thedynamicgoverningequationofthesystemWasderived，andthestate-spaceexpressionofthedynamicsystemwasdeveloped．Ahybridoptimizationalgorithmcombinedwithminimuminputenergy，maximume

7、nergytransferringandmaximumofminmumsingularvalueofcontrollabilityGrammianWasproposed．TheoptimizationprocessWascarriedoutusinggeneticalgorithm．Andoptimalplacementpositionoftheactuator／sensorwasobtained．Alsoacomparableresearchwasimplementedcomparedwithotherpositions．Inchapterfour,li

8、nearquadraticoptimalcontroltheory