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ID:41100250
大小:127.76 KB
页数:5页
时间:2019-08-16
《3 Modeling and Control of Vibration in Mechanical Systems》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、ksensorandapiezoelectricactuatorrepresentedbyitselongationthedisturbancesourcesensor,anamplifiedpiezoelectricactuator,andtwoflexiblejoints.toachievethegeometryofcubicconfiguration.Eachactivelegconsistsofaforceconnectedtoeachotherbysixactivelegs.Thelegsaremmount,oranactivedampingmount.tricStewartplatfor
2、mcanbeusedasaprecisionpointingdevice,avibrationisolationplifiedpiezoelectricactuator,aforcesensorandtwoflexiblejoints.Thispiezoelec-discussioninChapter1,eachlegofthehexapodStewartplatformconsistsofanam-theintegrationofsmartactuatorsandsensorsinthestructureitself.Referringtothementofstructuralstability
3、.MostsolutionstotheactivedampingproblemrelyonThestudyofactivedampingofflexiblestructureshasbeeninducedbytherequire-3.2Systemdescriptionandgoverningequationsverifythetransferfunctionobtained.approachwillthenbeintroducedandsubsequentlyusedtomodeltheplatformandtorforcetothesensoroutputbasedonfrequencyre
4、sponsedata.Anadaptivefilteringwillbeobtainedfirst,followedbythederivationofatransferfunctionfromtheactua-signalprocessingfields,forthemodelingofanunknownsystem.algorithmscanbeused.Indeed,adaptivefilteringisoftenadoptedincontrolandordertoobtainmoreaccuratemodelsforAnadaptivecontrolsystemisabletoadapttoth
5、echangesofaphysicalsystem.In3.1IntroductionModelingofStewartPlatform3.TheLaplaceformofthegoverningequationofthemotioninthissystemisFigure3.1showsanequivalentsystemofeachlegcShowninFigure1.2andFigure1.3,thehexapodconsistsoftwoparallelplatesInthischapter,thegoverningmotionequationofapiezoelectricStewa
6、rtplatformmandthesensitivepayloadphysicalsystems,adaptiveidentificationMthatareconnectedbyaforceonnectingtworigidbodies:ountedinsuchawayδandspringstiffness53payloadframedisplacementposition.Takingintoaccounttherelationshipbetweenthelegextensionandthewheresensoroutputiscatedineachlegofthehexapodandcol
7、locatedwiththeactuator.ThecorresfwhereThedynamicequationgoverningthesystemiswrittenasmassandstiffnessmatricesoftheglobalpassivesystem,i.e.,structureandhexapod.outputSingle-axissystemusingpiezoelectric
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