机床整体控制专家系统及智能柔性驱动编程方案计划

PAGE18AdaptivefuzzylogiccontrollerforDC–DCconverters

ExpertSystemswithApplicationsThispaperintroducesacompletedesignmethodtoconstructanadaptivefuzzylogiccontroller(AFLC)forDC–DCconverter.Inaconventionalfuzzylogiccontroller(FLC),knowledgeonthesystemsuppliedbyanexpertisrequiredfordevelopingmembershipfunctions(parameters)andcontrolrules.TheproposedAFLC,ontheotherhand,donotrequiredexpertformakingparametersandcontrolrules.Instead,parametersandrulesaregeneratedusingamodeldatafile,whichcontainssummaryofinput–outputpairs.TheFLCuseMamdanitypefuzzylogiccontrollersforthedefuzzificationstrategyandinferenceoperators.Theproposedcontrollerisdesignedandverifiedbydigitalcomputersimulationandthenimplementedforbuck,boostandbuck–boostconvertersbyusingan8-bitmicrocontroller.ArticleOutline1.Introduction2.Basicdesignofadaptivefuzzylogiccontroller3.Adaptationalgorithmforthefuzzylogiccontroller4.ComputersimulationoftheAFLC5.ImplementationoftheAFLCwithmicrocontroller6.ConclusionCommissioningoftextorCC,thenewTEXTORcontrolsystemandfirstoperatingexperiences

FusionEngineeringandDesignTheoldTEXTORcontrolsystemshavesuccessfullybeenupdated.ThemachinecontrolhasreplacedbytextorCC,asolutionbasedonthesoftwarepackageWinCCproducedbySiemens.WinCC,andthereforetextorCC,canbeeasilyintegratedwiththealreadyavailableSiemensS5/S7hardwarecomponents.Thisnewsystemhastheadvantagethatitisbasedonindustrialsoft-andhardware,thelifetimeofthecontrolsystemisextendedandthemaintenanceeffortisreduced.TheinstallationandcommissioningofthenewcontrolsystemwasdoneinparalleltoTEXTORoperation.DuringthistimeeachfunctionwastestedandcomparedwiththeactualTEXTORdata.Allfunctionalityoftheformercontrolsystemwasstep-by-stepreplaced.Specialattentionwasgiventothevisualization,dataanderrorlogging.ThemachinecontroltimingsystemhasbeenreplacedbyaninhousedevelopmentinpartnershipwithSiemens.ItconsistsoftransmittersandreceiversbasedonPROFIBUSmodulesandisfullycompatiblewiththepre-existingtiminginfrastructure.Theoldprogrammablefunctiongenerator(PFG)hasbeenreplacedbycompactRIOmodules,controlledandprogrammedbyLabview.ThisnewPFGsystemallowstoprogramupto84differenttimedependentsignals.Inthispaperweintenttopresentamoredetailedoverviewofour,onWinCC-basedwork,andafirststatusreportonthisnewcontrolsystemforTEXTOR.ArticleOutline1.Introduction2.Replacementofcriticalitems.OldS3PLC-components.Programmablefunctiongenerator.Timing2.3.1.Codegeneration2.3.2.Modules2.3.3.Software,Step7,WinCC3.textorCC4.ConclusionandoutlookReferencesApplicationofPLCtodynamiccontrolsystemforliquidHecryogenicpumpingfacilityonJT-60UNBIsystem

ThecontrolsystemofthecryogenicfacilityintheJT-60NBIsystemhasbeenreplacedbyemployingthePLC(ProgrammableLogicController)andSCADA(SupervisoryControlAndDataAcquisition)system.Theoriginalcontrolsystemwasconstructedabout20yearsagobyspecifyingtheDCS(DistributedControlSystem)computertodealwith400feedbackloops.Recently,troublesonthiscontrolsystemhaveincreasedduetoitsage-induceddeterioration.Tomaintainthehighreliabilityofthecryogenicfacility,anewcontrolsystemhasbeenplannedwiththePLCandSCADAsystems.Theirattractivefeaturesincludehighmarketavailabilityandcost-effectiveness,however,theuseofPLCforsuchalargefacilitywith400feedbackloopshasnotbeenestablishedbecauseofinsufficientprocessingcapabilityoftheearlyPLC.Meanwhile,therecentprogressinthePLCenablestousetheFBD(functionblockdiagram)programminglanguagefor500functionblocks.ByoptimizingthefunctionblocksandconnectingthemintheFBDlanguage,thefeedbackloopshavebeensuccessfullyreplacedfromDCStoPLCwithoutasoftwaredeveloper.Moreover,anoscillationoftheliquidHelevel,whichoftenoccursduringthecooldownmodeofthecryopumps,canbeautomaticallystabilizedbyeasilyaddinganewprocessprograminthePLC.Atpresent,thenewcontrolsystemhasworkedwell.ArticleOutline1.Introduction2.CryogenicfacilityforNBIsystem3.PLCbasedcontrolsystem.Designconcept.ConstructionofPLCbasedcontrolsystem4.Operationalresults5.SummaryReferencesTheECALonlinesoftwareinthecommissioningoftheCMSdetector

NuclearInstrumentsandMethodsinPhysicsResearchSectionA:Accelerators,Spectrometers,DetectorsandAssociatedEquipmentTheElectromagneticCalorimeter(ECAL)oftheCompactMuonSolenoid(CMS)detectorattheCERNLargeHadronCollider(LHC)isacrystalhomogeneouscalorimetermadeofabout76

000leadtungstatecrystals.ThedetectorwasinstalledintheCMSexperimentalcavernin2007and2008andwascommissionedwithcosmicraysandwithLHCbeamsin2008.ThetriggeranddataacquisitionsystemoftheCMSECALcomprises35

000FrontEndASICsand170OffDetectorVMEBoards.Theoperationofthesystem,performedbytheECALonlinesoftware,requirestheconfigurationofO(107)parametersandtherealtimemonitoringofO(105)registers.InthispaperwediscussthedesignandarchitectureoftheECALonlinesoftwareanditsperformancesincosmicrayrunsandwiththefirstLHCbeams.ArticleOutline1.Introduction2.ArchitectureoftheCMSECALDAQsystem3.RoleandperformancesoftheECALonlinesoftwareinthecommissioningoftheCMSElectromagneticCalorimeter4.ConclusionsAcknowledgementsCurrentsharingofparalleledDC–DCconvertersusingGA-basedPIDcontrollers

Wedemonstrateaconceptforpulse-widthmodulation(PWM)controlofaparallelDC–DCbuckconverter,whicheliminatestheneedformultiplephysicalconnectionsofgating/PWMsignalsamongthedistributedconvertermodules.TheproposedcontrolconceptmayleadtoeasierdistributedcontrolimplementationofparallelDC–DCconvertersanddistributedpowersystems.Forequipmentwithsignificantpowerrequirement,thetraditionalsinglepowersupplymaynotbeadequate.Manypowersupplieswithparallelregulationcontrolcanbeusedtosolvethisproblem.ThispaperproposesaProportional-Integral-Derivative(PID)controllertocontrolparalleledDC–DCbuckconvertersandcurrentsharingisachieved.Ageneticalgorithm(GA)isemployedtoderiveoptimalornearoptimalPIDcontrollergains.BothsimulationsandexperimentalresultsareprovidedtoverifythetheoreticalanalysisthroughanexperimentalprototypeofparalleledDC–DCbuckconverters.ArticleOutline1.Introduction2.AGA-basedPIDcontrollerdesign3.Stabilityanalysis4.Experimentalresults.Simulationresults.Experimentalresults5.ConclusionsAcknowledgementsIntegratedmodelingandcontrolofaPEMfuelcellpowersystemwithaPWMDC/DCconverter

PowerSourcesAfuelcellpoweredsystemisregardedasahighcurrentandlowvoltagesource.Toboosttheoutputvoltageofafuelcell,aDC/DCconverterisemployed.Sincethesetwosystemsshowdifferentdynamics,theyneedtobecoordinatedtomeetthedemandofaload.Thispaperproposesmodelsforthetwosystemswithassociatedcontrols,whichtakeintoaccountaPEMfuelcellstackwithairsupplyandthermalsystems,andaPWMDC/DCconverter.Theintegratedsimulationfacilitatesoptimizationofthepowercontrolstrategy,andanalysesofinterrelatedeffectsbetweentheelectricloadandthetemperatureofcellcomponents.Inaddition,theresultsshowthattheproposedpowercontrolcancoordinatethetwosourceswithimproveddynamicsandefficiencyatagivendynamicload.ArticleOutlineNomenclature1.Introduction2.Modelingofafuelcellstack,airsupplyandthermalcircuit.PEMfuelcellstack2.1.1.Modelimprovementforthestack2.1.2.Parametersandsimulation.Airsupplysystem.Thermalsystem.Controlsfortheairandcoolantflowrate3.DC/DCconverter4.PowercontrolofthePEMfuelcellsystemwiththeDC/DCconverter5.Integrationandsimulation6.HYPERLINK"&_udi=B6TH1-4MGVT4M-3&_user=8793841&_coverDate=02%2F10%2F2007&_alid=86&_rdoc=7&_orig=search&_origin=search&_zone=rslt_