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234 个结果
  • 简介:Alongwiththedevelopmentsonthehardware'stechniqueoftheLEDelectronicdisplay,thecontrolsoftwarewasalsoaskedtoadvancetoanewlevel.Theoldsoftwareofourcompanycouldn'tdemandnolonger.It'ssatisfythecustomer'snecessarytodesignanewplaysoftwaretoshowtheadvantagesoftheLEDelectronicdisplay.

  • 标签: LED API函数 DOC文档播放 软件设计 电子显示屏
  • 简介:FormorethanoneyeartheCLEOⅢexperimentattheCornellelectronpositronstorageringCESRhasaccumulatedPhysicsdatausinga4layersiliconvertexdetectorandanovelringimageCherenkovdetector,alongwithaconventionalDriftchamber,E.M.calorimeterandmuonchambers.BythetimeofCHEP2001theexperimenthasaccumulated10fb^-1ofdata,Thereadoutandmonitoringsystemscontrol,ca.400000electronicchannels.Detectorconfiguration.dataqualityandcomponentmonitoring,runcontrolareonlysomeoftheSlowControltasksthathavetobeperformed.DeployingindustrystandardssuchasCORBA(inter-platformcommunication)Java(remoteaccessviaWebbrowser)andObjectivity(eventandconstantsdatabse)asbuildingblocksofthecomputernetworkhasbeenofcentralimportance.Objectorienteddesignhasenabledtheseamlessintegrationofthemanyindividualcomponents.Inourpresentationwewilldescribeexperienceswiththisdistributedcontrolsystemandgiveareportofthemeasurestakentoobtainahighsystemavailability.

  • 标签: CLEOⅢ实验 计算机控制系统 数据获取
  • 简介:InthispaperweanalyzetheoptimalcontrolproblemforaclassofaffinenonlinearsystemsundertheassumptionthattheassociatedLiealgebraisnilpotent.TheLiebracketsgeneratedbythevectorfieldswhichdefinethenonlinearsystemrepresentaremarkablemathematicalinstrumentforthecontrolofaffinesystems.Wedeterminetheoptimalcontrolwhichcorrespondstothenilpotentoperatorofthefirstorder.Inparticular,weobtainthecontrolthatminimizestheenergyofthegivennonlinearsystem.Applicationsofthiscontroltobilinearsystemswithfirstordernilpotentoperatorareconsidered.

  • 标签: 系统最优控制 仿射非线性 非线性系统 最优控制问题 能量最小化 双线性系统
  • 简介:ARevisedEditionofthenow-classical1971texteditedbyL.Beranek,NoiseandVibrationControl,hasbeenpublishedbytheInstituteofNoiseControlEngineering.NoiseandVibrationControlisofgreatvaluetodesignandsafetyengineers,consultants,scientists,architects,governmentresearchers,publicofficialsandothersconcernedwiththecontrolofnoiseemittedbymachineryandwithcontrolofenvironmentalnoiseinbuildings,intheworkplace,nearairportsandhighways,andinthecommunity.This

  • 标签: OFFICIALS MACHINERY concerned NOISE contr hasbeen
  • 简介:Thepressurereflectedfromabi-laminatedpiezoelectricplatehasbeendeterminedusingtheThomson-Haskellmatrixmethod.Theplateiscomposedofapiezoelectriclayerwithgroundedvacuumandanelasticlayerincontactwiththefluid.Anincidentplanewaveinthefluidmediumstrikestheplateatdif-ferentangles.Therequiredelectricpotentialacrossthepiezoelectriclayertocancelthereflectionfromthefluid/elasticboundaryhasbeendeterminedforthepiezoelectricmaterialPZT-5atvariousthicknessparame-lersandincidentfrequencies.

  • 标签: UNDERWATER ACOUSTIC CONTROL laninated piezoeleetrie plate
  • 简介:永久磁铁同步马达(PMSM)可以与掉进某个区域的全身的参数或在某些工作条件下面经历混乱行为,它威胁安全、稳定的操作马达驱动。因此,学习在PMSM控制或压制混乱的方法是重要的。在这个工作,Takagi-Sugeno(T-S)为PMSM的模糊冲动的控制模型经由T-S建模方法论和冲动的技术被建立。基于新模型,为PMSM的asymptotical稳定性和指数的稳定性的控制条件被Lyapunov方法导出。最后,一个说明例子也被给显示出获得的结果的有效性。

  • 标签: 模糊脉冲控制 永磁同步电动机 混沌状态 系统参数
  • 简介:Weanalyzedthephenomenonofferrofluidmagnetoviscosityinhigh-permeabilitywall-regionnon-magneticporousmediaoftheMullerkind.Afterupscalingthepore-levelferrohydrodynamicmodel,weobtainedasimplifiedvolume-averagezero-orderaxisymmetricmodelfornon-Darcynon-turbulentflowofsteady-stateisothermalincompressibleNewtonianferrofluidsthroughaporousmediumexperiencingexternalconstantbulk-floworientedgradientmagneticfield,ferrofluidself-consistentdemagnetizingfieldandinducedmagneticfieldinthesolid.Themodelwasexploredincontextsplaguedbywallflowmaldistributionduetolowcolumn-to-particlediameterratios.Itwasshownthatforpropermagneticfieldarrangement,wallchannelingcanbereducedbyinflatingwallflowresistancethroughmagnetovisco-thickeningandKelvinbodyforcedensitywhichrerouteafractionofwallflowtowardsbedcore.

  • 标签: 多孔介质 铁磁流体 磁粘性控制 壁流 沟道效应
  • 简介:Elmannetworks'dynamicalmodelingcapabilityisdiscussedinthispaperfirstly.AccordingtoElmannetworks'uniquestructure,aweighttrainingalgorithmisdesignedandanonlinearadaptivecontrollerisconstructed.WithoutthePEpresumption,neuralnetworkscontroller'sclosed-looppropertiesarestudiedandthewholeElmannetworks'passivityisdemonstrated.

  • 标签: ELMAN网络 动力学模型 非线性控制系统 神经网络
  • 简介:ByapplyingtheHeavisidefunction,theequationsgoverninglaminatedplatespossess-ingspatiallydistributedpiezoelectricpatcheshavebeenestablished.Basedontheseequations,staticshapecontroloflaminatedplatesisdiscussed.Byusingageneticandcollocationalgorithm,theopti-mallocationsandscalesofthesepiezoelectricpatcheshavebeenselected.Numericalexamplesarepre-sentedtoillustratetheefficiencyofthealgorithmandthepiezoelectricactuators.

  • 标签: LAMINATED PLATE PIEZOELECTRIC material SHAPE control
  • 简介:这份报纸为一组僵硬身体学习协调运动产生的问题。协调运动原语,相对equilibria和演习的二个班,当为产生的积木协调了运动,被给。在运动原语计划框架基于,一个控制方法面对不安为一个协调运动计划的柔韧的执行被建议。控制方法把相对equilibria稳定与演习设计相结合,并且导致计划框架的一个靠近环的运动。控制方法的表演通过数字模拟被说明了。

  • 标签: 协调控制 协调运动 多刚体 基元 运动规划 运动计划
  • 简介:Duetotheupcomingdemandsofnext-generationelectronic/magnetoelectronicdeviceswithlow-energyconsumption,emergingcorrelatedmaterials(suchassuperconductors,topologicalinsulatorsandmanganites)areoneofthehighlypromisingcandidatesfortheapplications.Forthepastdecades,manganiteshaveattractedgreatinterestduetothecolossalmagnetoresistanceeffect,charge-spin-orbitalordering,andelectronicphaseseparation.However,theincapableofdeterministiccontrolofthoseemerginglow-dimensionalspinstructuresatambientconditionrestricttheirpossibleapplications.Therefore,theunderstandingandcontrolofthedynamicbehaviorsofspinorderparametersatnanoscaleinmanganitesunderexternalstimuliwithlowenergyconsumption,especiallyatroomtemperatureishighlydesired.Inthisreview,wecollectedrecentmajorprogressesofnanoscalecontrolofspinstructuresinmanganitesatlowdimension,especiallyfocusingonthecontroloftheirphaseboundaries,domainwallsaswellasthetopologicalspinstructures(e.g.,skyrmions).Inaddition,capacitor-basedprototypespintronicdevicesareproposedbytakingadvantageoftheabovecontrolmethodsinmanganites.Thiscapacitor-basedstructuremayprovideanewplatformforthedesignoffuturespintronicdeviceswithlow-energyconsumption.

  • 标签: 自旋结构 定性控制 锰氧化物 低维材料 纳米级 磁电子器件
  • 简介:这篇论文论述新细胞的自动机(CA)为火车控制的模型系统模拟。在建议CA模型,训练运动的司机反应被一些更新的规则捕获。交通鞠躬和火车运动的轨道的时空图被用来获得卓见进铁路交通流动的典型行为。很多模拟结果证明建议CA模型能成功地为铁路交通的模拟被使用。铁路交通鞠躬的典型行为能不仅被复制,而且模拟前进接近理论价值的最小的时间珍视。

  • 标签: 交通流 细胞自动机 列车 移动闭塞式控制系统 建模