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500 个结果
  • 简介:TherobustH∞controlfornetworkedcontrolsystemswithbothstochasticnetwork-induceddelayanddatapacketdropoutisstudied.Whendataaretransmittedovernetwork,thestochasticdatapacketdropoutprocesscanbedescribedbyatwo-stateMarkovchain.Thenetworkedcontrolsystemswithstochasticnetwork-induceddelayanddatapacketdropoutaremodeledasadiscretetimeMarkovjumplinearsystemwithtwooperationmodes.ThesuffcientconditionofrobustH∞controlfornetworkedcontrolsystemsstabilizedbystatefeedbackcontrollerispresentedintermsoflinearmatrixinequality.Thestatefeedbackcontrollercanbeconstructedviathesolutionofasetoflinearmatrixinequalities.Anexampleisgiventoverifytheeffectivenessofthemethodproposed.

  • 标签: 网络控制系统 H∞控制 线性系统 神经网络
  • 简介:Theguaranteedcostcontrolproblemfornetworkedcontrolsystems(NCSs)isaddressedundercommunicationconstraintsandvaryingsamplingrate.Firstofall,asimpleinformation-schedulingschemeispresentedtodescribetheschedulingapproachofsystemsignalsinNCSs.Then,basedonsuchaschemeandgivensamplingmethod,thedesignprocedureindynamicoutputfeedbackmannerisalsoderivedwhichrenderstheclosedloopsystemtobeasymptoticallystableandguaranteesanupperboundoftheLQperformancecostfunction.

  • 标签: 网络控制 采样率 信息调度 线性矩阵不等式
  • 简介:ThispaperpresentsafurtherimprovedProductionActivityControlArchitecturetodealwiththecomplexityofinformationbycreatingSub-ProducersandSub-MoverswhichwillnotonlygiveabettercontrolatworkstationlevelbutalsoreduceloadontheDispatcher.ItalsomakesananalysisofthebasicandimprovedPAC(ProductionActivityControl)ArchitectureintheControlSystemforIntegratedManufacturing.ThePACArchitectureandtheimprovementwillfurtherenhancetheflexibilityandadaptabilityofthearchitectureintheeverchangingenvironmentoftheShopFloorControl(SFC)Systems.

  • 标签: MANUFACTURING system SHOP FLOOR CONTROL PRODUCTION
  • 简介:Weinvestigatetheproblemofteleportationofunitaryoperationsbyunidirectionalcontrol-statetelepor-rationandproposeaschemecalledunidirectionalquantumremotecontrol.Theschemeisbasedontheisomorphismbetweenoperationandstate.Itallowsustostoreaunitaryoperationinacontrolstate,therebyteleportatSonoftheunitaryoperationcanbeimplementedbyunidirectionalteleportationofthecontrol-state.WefindthattheprobabilityofsuccessforimplementinganarbitraryunitaryoperationonarbitraryA~-qubitstatebyunidirectionalcontrol-stateteleportationis4^-M,and2Mebitsand4Mcbitsareconsumedineachteleportation.

  • 标签: 量子信息 单向性 量子遥控 量子输运 控制状态 远距离传输
  • 简介:Apressurizerisoneofimportantequipmentinapressurizedwaterreactorplant.Itisusedtomaintainthepressureofprimarycoolantwithinallowedrangebecausethesharpchangeofcoolantpressureaffectsthesecurityofreactor,therefor,thestudyofpressurizer'spressurecontrolmethodsisveryimportant.Inthispaper,anadaptivefuzzycontrollerispresentedforpressurecontrolofapressurizerinanuclearpowerplant.Thecontrollercanon-linetunefuzzycontrolrulesandparametersbyself-learningintheactualcontrolprocess,whichpossessesthewayofthinkinglikehumantomakeadecision.Thesimulationresultsforapressurizedwaterreactorplantshowthattheadaptivefuzzycontrollerhasoptimumandintelligentcharacteristics,whichprovethecontrolleriseffective.

  • 标签: 模糊控制 加压器 压力控制 水反应器
  • 简介:Highperformancecontrolofaninteractiveprocesssuchasironandsteelplantreliesonabilitytohonorsafetyandoperationalconstraints;reducethestandarddeviationsofvariablesthatneedtobecontrolled(e.g.productquantity,quality);de-bottleneckingtheprocess;and,maximizeprofitabilityorlowercost(e.g.energysavings,improvehotmetalcontent).Theseobjectivesmaybeprioritizedinthisorder,butcanvaryandareverydifficulttoachieveoptimallythroughconventionalcontrol.Amultivariablepredictivecontrollersolution,alongwithitsextensiveinferentialsensorandbuilt-inoptimizer,providesonlineclosedloopcontrolandoptimizationformanyinteractivemetalandminingprocessestolowertheenergycost,increasethroughput,andoptimizeproductqualityandyield.Controlloopperformanceisalsoakeyfactortoimproveironandsteelplantautomationandoperationresult;HoneywellCPMoffersvender-independentproductwhichprovidesmonitoring,tuning,modelingofcontrolloopandsustainableloopperformanceanalysisandmaintenancesolutiontowardsoperationstabilityandenergysaving.

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  • 简介:Internationalarmscontrolanddisarmamenthasrecordedremarkableachieve-mentsinrecentyearsinthewakeofrapproachmentamongmajorpowersandoveralldetenteintheworldatlarge.Theseremarkableachievements,intheirturn,havepropelledtheglobalsituationfurtherinthedirectionfavorabletofurtherrelaxationofglobaltension.Thesemutuallyreinforcingandsupplementarytrends,

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  • 简介:一个抑制模型为与数据包退学学生一起的联网的控制系统的预兆的控制(MPC)算法在这篇论文被建议。一个缓冲区被设计存储在控制器和致动器之间的预言的控制顺序。MPC的控制地平线是否是,被看那不少于数据包的数字连续地输了,在起始的时间的MPC的可行性暗示靠近环的系统的asymptotical稳定性。一个模拟例子说明建议途径的有效性。

  • 标签: 网络控制系统 模型预测控制 数据包丢失 稳定 控制序列 执行机构
  • 简介:Apathfollowingcontrollerisdevelopedforunderactuatedshipswithonlysurgeforceandyawmomentavailabletofollowapredefinedpath.Theproposedcontrollerisbasedonnonswitchanalyticmodelpredictivecontrol.Itisshownthattheoptimalcontrollawforanonlinearpathfollowingsystemwithill-definedrelativedegreeiscontinuousandnonsingular.Theproblemofill-definedrelativedegreeissolved.Thepath-followingabilityofthenonlinearsystemisguaranteed.Numericalsimulationsareprovidedtodemonstratetheeffectivenessoftheproposedcontrollaw.

  • 标签: 路径跟踪控制 模型预测控制 控制驱动 船舶 开关 非线性系统
  • 简介:Akindofnetworkedcontrolsystemisstudied;thenetworkedcontrolsystemwithnoisedisturbanceismodeledbasedoninformationschedulingandcontrolco-design.Augmentedstatematrixanalysismethodisintroduced,androbustfault-tolerantcontrolproblemofnetworkedcontrolsystemswithnoisedisturbanceunderactuatorfailuresisstudied.Theparametricexpressionofthecontrollerunderactuatorfailuresisgiven.Furthermore,theresultisanalyzedbysimulationtests,whichnotonlysatisfiesthenetworkedcontrolsystemsstability,butalsodecreasesthedatainformationnumberinnetworkchannelandmakesfulluseofthenetworkresources.

  • 标签: 神经网络控制 信息调度 线性矩阵不等式 系统分析
  • 简介:Nonlinearcontrollabilityandattitudestabilizationarestudiedfortheunderactuatednonholonomicdynamicsofarigidspacecraftwithonevariable-speedcontrolmomentgyro(VSCMG),whichsuppliesonlytwointernaltorques.Nonlinearcontrollabilitytheoryisusedtoshowthatthedynamicsarelocallycontrollablefromtheequilibriumpointandthuscanbeasymptoticallystabilizedtotheequilibriumpointviatime-invariantpiecewisecontinuousfeedbacklawsortime-periodiccontinuousfeedbacklaws.Specifically,whenthetotalangularmomentumofthespacecraft-VSCMGsystemiszero,anyorientationcanbeacontrollableequilibriumattitude.Inthiscase,theattitudestabilizationproblemisaddressedbydesigningakinematicstabilizinglaw,whichisimplementedthroughanonlinearproportionalandderivativecontroller,usingthegeneralizeddynamicinverse(GDI)method.Thesteady-stateinstabilityinherentintheGDIcontrolleriselegantlyavoidedbyappropriatelychoosingcontrolgains.Inordertoobtainthecommandgimbalrateandwheelaccelerationfromcontroltorques,asimplesteeringlogicisconstructedtoaccommodatetherequirementsofattitudestabilizationandsingularityavoidanceoftheVSCMG.Illustrativenumericalexamplesverifytheefcacyoftheproposedcontrolstrategy.

  • 标签: 变速控制力矩陀螺 姿态控制 航天器 刚性 姿态稳定 可控性
  • 简介:Inthispaper,anactivefaultaccommodatestrategyisproposedfortheplantinthepresenceofactuatorfaultandinputconstraints,whichisacombinationofadirectadaptivecontrolalgorithmwithmultiplemodelswitching.Theμ-modificationisintroducedinthemodelreferencearchitecturetoconstructtheadaptivecontroller.TheproofofstabilityisbasedonthecandidateLyapunovfunction,whileappropriateswitchingofmultiplemodelsguaranteesasymptotictrackingofthesystemstatesandtheboundednessofallsignals.Simulationresultsillustratetheefficiencyoftheproposedmethod.

  • 标签: 飞行控制系统 输入约束 重构控制 LYAPUNOV函数 多模式 多模型切换
  • 简介:一个柔韧的适应控制计划基于backstepping设计与两个未知控制方向和非对称的死了地区的非线性在严格的反馈形式为不明确的非线性的系统的一个类被建议。死了地区的斜坡和边界相等、对称的条件被简化非线性的死了地区的输入模型,移开要知道的控制方向的priori知识被利用Nussbaum类型获得技术和神经网络(NN)消除的假设近似能力。可能的控制器奇特问题和死了地区的输入非线性的效果被把不可分的Lyapunov设计与滑动模式控制策略相结合完美地避免。在靠近环的系统的所有信号被保证到最终一致地半全球性被围住,系统的追踪的错误被证明被集成到起源的一位小邻居。模拟结果表明建议控制计划的有效性。

  • 标签: 不确定非线性系统 鲁棒自适应控制 执行器 死区非线性 Lyapunov 非线性系统控制