简介:ThispaperpresentsafurtherimprovedProductionActivityControlArchitecturetodealwiththecomplexityofinformationbycreatingSub-ProducersandSub-MoverswhichwillnotonlygiveabettercontrolatworkstationlevelbutalsoreduceloadontheDispatcher.ItalsomakesananalysisofthebasicandimprovedPAC(ProductionActivityControl)ArchitectureintheControlSystemforIntegratedManufacturing.ThePACArchitectureandtheimprovementwillfurtherenhancetheflexibilityandadaptabilityofthearchitectureintheeverchangingenvironmentoftheShopFloorControl(SFC)Systems.
简介:Inordertomeettheneedsofpracticaldesign,aninterpolationtechniqueisemployedtoconstraintheshapeofsurfaces.Themethodofpreservingpositivityontheinterpolationsurfaceandconstraintoninterpolatingdataisalsodeveloped.Theadvantageofthisnewmethodisthatitcanbeusedtoconstraintheshapeofaninterpolatingsurfaceonlybyselectingsuitableparameters,andnumericalexamplesarepresentedtoshowtheperformanceofthemethod.
简介:Inordertoachieveawheelchairliftfunction,thispaperdesignsatri-scissorsmechanism.Throughtheso-calledH-typetransmissionandL-typeswingrod,thethreescissorsmechanismsliftinthesameratewithonlyonelinermotorwhileensuringthestabilityofthelift.FiniteelementanalysisinANSYSisperformedtoverifythematerialstrength.ThecontrolsystemwithSunplusSCMachievesthevoicecontrolofwheelchairwalkingandlifting.
简介:Determiningtheimportanceratingsoftechnicalcharacteristicsisatypicalgroupdecision-makingprocess.Thelinguistic-basedapproachcaneffectivelymanagetheimpreciseandmulti-granularityinformationinqualityfunctiondeploymentandfacilitatedecision-makinginderivingtheimportanceratings.Basedonthelinguisticweightedaveraging(LWA)operatorandthelinguistichybridaveraging(LHA)operator,apracticalapproachisproposedtofirstaggregatetheindividualjudgmentsintoacollectivevalueforeachtechnicalcharacteristicunderlinguisticenvironment,andthenmeasurethedeviationdegreeoflinguisticvariablestoobtaintheimportanceratingsoftechnicalcharacteristics.Acasestudyshowstheapplicationoftheproposedmethod.
简介:ControlsystemdesignpackageslikeMATLAB,MATRIXX,ControlC,SIMNON,etc.havebecomeessentialingredientsofbothundergraduateandgraduatecoursesinthefieldsofsystemsandcontrols.TheuseofMATLABanditscompaniontoolboxesinteachinggraduateandundergraduatecourseswasreportedbymanyeducatorsinthepast.TheexperiencewiththeuseofSIMULINKandMATLABinIntelligentControlCourseisintroducedwhichisofferedtograduatestudentsatBeijingUniversityofAeronauticsandAstronautics(BUAA).TheuseofSIMULINKforsimulationofintelligentcontroloftheirbehaviorisemphasized.TheMATLABfeaturesusefulinthiscoursearepresented.HowSIMULINKandMATLABhelpinenhancingthestudents’understandingofthematerialandreducingtheamountoftimespentinperformingcomputationalhomeworkassignmentsisdiscussed.
简介:Theobjectiveofthispaperistodevelopaneuralnetwork-basedresidualgeneratortodetectthefaultintheactuatorsforaspecificcommunicationsatelliteinitsattitudecontrolsystem(ACS).First,adynamicmultilayerperceptronnetworkwithdynamicneuronsisused,theseneuronscorrespondtoasecondorderlinearInfiniteImpulseResponse(IIR)filterandanonlinearactivationfunctionwithadjustableparameters.Second,theparametersfromthenetworkareadjustedtominimizeaperformanceindexspecifiedbytheoutputestimatederror,withthegiveninput-outputdatacollectedfromthespecificACS.Then,theproposeddynamicneuralnetworkistrainedandappliedfordetectingthefaultsinjectedtothewheel,whichisthemainactuatorinthenormalmodeforthecommunicationsatellite.Thentheperformanceandcapabilitiesoftheproposednetworkweretestedandcomparedwithaconventionalmodel-basedobserverresidual,showingthedifferencesbetweenthesetwomethods,andindicatingthebenefitoftheproposedalgorithmtoknowtherealstatusofthemomentumwheel.Finally,theapplicationofthemethodsinasatellitegroundstationisdiscussed.