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1、5802IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.60,NO.12,DECEMBER2013BoundaryControlofaFlexibleRiserWiththeApplicationtoMarineInstallationWeiHe,Member,IEEE,ShuangZhang,StudentMember,IEEE,andShuzhiSamGe,Fellow,IEEEAbstractThispaperinvestigatesthecontrolproblemofamarineriser
2、installationsystem.Theriserinstallationsystemconsistingofavessel,aflexibleriser,andasubseapayloadismodeledasadistributedparametersystemwithonepartialdiffer-entialequationandfourordinarydifferentialequations.BasedonLyapunovsdirectmethod,adaptiveboundarycontrolisproposedatthe
3、topandbottomboundariesoftherisertopositionthesubseapayloadtothedesiredsetpointandsuppresstherisersvibration.Withtheproposedcontrol,uniformboundednessofthesteady-stateerrorbetweentheboundarypayloadandthedesiredpositionisachievedbysuitablychoosingthedesignparameters.Numerica
4、lsimulationsarepresentedfordemonstratingtheeffectivenessoftheproposedcontrol.IndexTermsAdaptivecontrol,boundarycontrol,distributedparametersystem,flexibleriser,partialdifferentialequation.I.INTRODUCTIONHETRENDintheoffshoreindustryistowardthein-Tcreaseduseofinstallationsyste
5、msandfloatingplatformssuchasanchoredfloatingproduction,storage,andoffloading(FPSO)vesselsindeepwater.Theriserinstallationsystemcon-Fig.1.Typicalbeam-typemarineriserinstallationsystem.sistingofanFPSO,ariser,andthesubseapayloadhasbeenac-ceptedasoneofthesolutionsfortheexploitati
6、onofoilandgasisapayloadwithanend-pointthrusterattached.Thisthrusterintheoffshoreengineering.Themarineriserisusedfortrans-isusedfordynamicpositioningofthepayload.portingthecrudeoilornaturalgasfromtheoilwellintheoceanDevelopmentofageneralframeforcontroloftheflexiblefloortothep
7、roductionvesselorplatformintheoceansurfacemarinerisersysteminthepresenceoftheunknownocean[1].Thewholemarineinstallationsystemissubjectedtoen-disturbancesisquiteachallengingresearchtopic.Inearliervironmentaldisturbancesincludingtheoceancurrent,wave,worksofmarineflexibleriser
8、s[2],themodelingoftheriserandwind.Atypicalmarineriserinstallationsystemisshownsystemsisin
