简介：Amomentactuatorwithdirectdetectionofforcesisdescribed,Momentfrequencyre-sponseandmomentexcitationpurityasperformancecriteriaareproposed.Methodsfortheperfor-mancecalibrationoftheactuatorarepresented.Assessmentiscarriedoutbymeansofthereciprocityprinciple.

简介：这篇论文与致动器浸透为线性交换系统涉及控制器合成。基于普通Lyapunov功能技术；multiple-Lyapunov功能技术，为设计州的反馈控制器的二个方法与浸透为交换系统以线性矩阵不平等分别地被建议。扩大吸引人的领域的一条途径然后被调查。介绍途径的申请被一个数字例子最后说明。

简介：Anewandefficienttechniquefordeterminingoptimallocationsofsensorsandactuatorsofintelligentstructuresispresented.Theoptimizationofsensorandactuatorlocationsisbasedonthe1stordersingularvalueperturbationsofobservabilityandcontrollability.Usingthismethodtheoptimalplacementsofsensorsandactuatorsoftheintelligentstructurercanbeselected.Twonumericalexamplesaregiventodemonstratetheapplicationsofthemethod.Theimpulseresponsesofstructuresduetodifferentlocationsofactuatorswiththesamecontrollawareanalyzedindetail.

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简介：Theobjectiveofthispaperistodevelopaneuralnetwork-basedresidualgeneratortodetectthefaultintheactuatorsforaspecificcommunicationsatelliteinitsattitudecontrolsystem(ACS).First,adynamicmultilayerperceptronnetworkwithdynamicneuronsisused,theseneuronscorrespondtoasecondorderlinearInfiniteImpulseResponse(IIR)filterandanonlinearactivationfunctionwithadjustableparameters.Second,theparametersfromthenetworkareadjustedtominimizeaperformanceindexspecifiedbytheoutputestimatederror,withthegiveninput-outputdatacollectedfromthespecificACS.Then,theproposeddynamicneuralnetworkistrainedandappliedfordetectingthefaultsinjectedtothewheel,whichisthemainactuatorinthenormalmodeforthecommunicationsatellite.Thentheperformanceandcapabilitiesoftheproposednetworkweretestedandcomparedwithaconventionalmodel-basedobserverresidual,showingthedifferencesbetweenthesetwomethods,andindicatingthebenefitoftheproposedalgorithmtoknowtherealstatusofthemomentumwheel.Finally,theapplicationofthemethodsinasatellitegroundstationisdiscussed.

简介：Anadaptiveactuatorfailurecompensationschemeisproposedforattitudetrackingcontrolofspacecraftwithunknowndisturbancesanduncertainactuatorfailures.Anewfeatureofthisadaptivecontrolschemeistheadaptationofthefailurepatternparameterestimates,aswellasthefailuresignalparameterestimates,fordirectadaptiveactuatorfailurecompensation.Basedonanadaptivebacksteppingcontroldesign,theestimatesofthedisturbanceparametersareusedtosolvethedisturbancerejectionproblem.Theunknowndisturbancesarecompensatedcompletelywiththestabilityofthewholeclosed-loopsystem.Theschemeisnotonlyabletoaccommodateuncertainactuatorfailures,butalsorobustagainstunknownexternaldisturbances.Simulationresultsverifythedesiredadaptiveactuatorfailurecompensationperformance.

简介：一条动态输出反馈控制器设计途径基于锥，互补linearisation过程被建议为线性时间不变(LTI)有致动器的系统浸透。首先，吸引力的领域的评价被给。然后，发现吸引力的领域的一个更大的评价的一个设计方法被介绍。在设计的过程，非凸的条件被获得，因此一个锥互补linearisation过程被利用解决非凸的可行性问题。二个例子被给说明设计方法的效率。

简介：这篇论文考虑源于易于致动器浸透和L无穷骚乱的线性系统的一个家庭的一个交换系统的骚乱忍耐/拒绝的问题。为骚乱的L无穷标准上的线性反馈获得，一个给定的切换的计划和给定的界限的一个给定的集合，条件被建立，以线性或双线性的矩阵不平等，在哪个下面一套某个形式面对致动器浸透和L无穷骚乱为一个给定的交换线性系统是不变的，并且靠近环的系统拥有骚乱拒绝的某个水平能力。与这些条件，反馈获得和切换的计划的设计能是抑制了优化问题被提出并且解决。骚乱忍耐被最大的界限在从一个给定的集合开始的轨道为仍然保持围住的骚乱上测量。骚乱拒绝被系统产量的L无穷标准或由驾驶它的状态进或在起源的一位小邻居以内保留它的系统鈥檚能力测量。结果那，在家庭的所有系统是相同的，交换系统还原剂到在一条切换的反馈法律下面的一个单个系统。模拟结果比一条单个线性反馈法律能证明在一条切换的反馈法律下面的如此的一个单个系统能有更强壮的骚乱忍耐/拒绝能力。关键词致动器浸透-骚乱拒绝-骚乱忍耐-L无穷性能-集合不变性-交换系统梁璐在沈阳出生了，中国，在1980。他从沈阳大学，沈阳，中国，和Huaqiao大学在自动控制收到了他的学士和硕士学位，Quanzhou，中国分别地。他当前在自动化，上海JiaoTong大学，和部门的部门向他的博士学位正在工作电并且计算机工程，弗吉尼亚大学。林宗莉是在部门的一个教授电并且在弗吉尼亚大学的计算机工程。他从厦门大学在数学和计算机科学收到了他的学士学位，中国厦门在1983，他在从空格技术的中国学院的自动控制的M.E学位，中国北京在1989，并且他的博士学位在电并且从华盛顿的计算机工程州立大学，华盛顿普尔曼，在1994。他的当前的研�

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简介：IonicPolymer-MetalComposite(IPMC)canworkasanactuatorbyapplyingafewvoltages.AthickIPMCactuator,whereNafion-117membranewassynthesizedwithpolypyrrole/aluminacompositefiller,wasanalyzedtoverifytheequivalentbeamandequivalentbimorphbeammodels.TheblockingforceandtipdisplacementoftheIPMCactuatorweremeasuredwithaDCpowersupplyandYoung’smodulusoftheIPMCstripwasmeasuredbybendingandtensiletestsrespectively.ThecalculatedmaximumtipdisplacementandtheYoung’smodulusbytheequivalentbeammodelwerealmostidenticaltothecorrespondingmeasureddata.Finiteelementanalysiswiththermalanalogytechniquewasutilizedintheequivalentbimorphbeammodeltonumericallyreproducetheforce-displacementrelationshipoftheIPMCactuator.Theresultsbytheequivalentbimorphbeammodelagreedwellwiththeforce-displacementrelationshipacquiredbythemeasureddata.Itisconfirmedthattheequivalentbeamandequivalentbimorphbeammodelsarepracticallyandeffectivelysuitableforpredictingthetipdisplacement,blockingforceandYoung’smodulusofIPMCactuatorswithdifferentthicknessanddifferentcompositeofionicpolymermembrane.

简介：Giantmagnetostrictiveactuators(GMAs)oftenworkinaclose-loopfeedbacksystem.Thissystemneedsindependentsensorswhichmaybedifficulttobefixed,besides,excessivesensorsmaycausemoreunpredictedproblemsinalargesystem.Thispaperaimstodevelopaself-sensingGMA.Anobserverbasedonpiezomagneticequationsisconstructedtoestimatethestressandstrainofthemagnetostrictivematerial.Theobserverbasedself-sensingapproachdependsonthefactsthatthemagneticfieldiscontrollableandthatthemagneticinductionismeasurable.Aimingatthenonlinearhysteresisinmagnetization,ahys-teresiscompensationobserverbasedonPreisachmodelisdeveloped.Experimentverifiedtheavailabilityoftheobserverapproach,andthehysteresiscompensationobserverhashighertrackingprecisionthanlinearobserverfordynamicforcesensing.

简介：有一个压电的致动器(D-MFPA)的一个双方面的多重扇子系统，它能驾驶八把被动颤动扇子并且提供二方向性的空气由使用仅仅一个压电的致动器流动，在这研究被调查了。而且，扇子图案的二种类型，viz。磁性的扇子(MF)和合成磁性的扇子(CMF)也被探索。在MF的调查，当碳纤维板(L)的长度从55公里减少了到35公里，结果显示D-MFPA的回声频率从27.6Hz增加了到66Hz。它也减少了到4.8公里的从12.4mm的D-MFPA的振幅。为CMF，当时，结果证明回声频率减少了Mylar板的长度(增加的El)，和最大的减少从66Hz到45Hz什么时候L=35公里和El=30公里。无尺寸的热传送对流数字(MD-MFPA)被定义描述并且确定在热表演的改进。结果证明单身的压电的扇子的最佳的MD-MFPA为使一热来源凉下来是1.58。由对比，在一样的电源消费下面，D-MFPA不仅使二热来源凉下来而且显示了更好热的性能。

简介：WeproposedadynamicmodelidentificationanddesignofanH-Infinity(i.e.H_∞)controllerusingaLightweightPiezo-CompositeActuator(LIPCA).Asecond-orderdynamicmodelwasobtainedbyusinginputandoutputdata,andapplyinganidentificationalgorithm.TheidentifiedmodelcoincideswellwiththerealLIPCA.Toreducetheresonatingmodethatistypicalofpiezoelectricactuators,anotchfilterwasused.AfeedbackcontrollerusingtheH_∞controlschemewasdesignedbasedontheidentifieddynamicmodel;thus,theLIPCAcanbeeasilyusedasanactuatorforbiomemeticapplicationssuchasartificialmusclesormacro/micropositioninginbioengineering.Thecontrolalgorithmwasimplementedusingamicroprocessor,analogfilters,andpoweramplifyingdrivers.Oursimulationandexperimentalresultsdemonstratethattheproposedcontrolalgorithmworkswellinrealenvironment,providingrobustperformanceandstabilitywithuncertaindisturbances.

简介：Inthispaper,theauthorsanalyzethestabilityofaclassofinterconnectedsystemswithsubsystemunmodeleddynamicsanddynamicinteractionsemployingdecentralizedadaptivecontrollersdesignedbyWen,Zhou,andWang(2008)inthepresenceofactuatorfailures.Itwillbeshownthattheglobalstabilityoftheremainingclosed-loopsystemisstillensuredandtheoutputsarealsoregulatedtozerowhensomesubsystemsbreakdown.

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简介：Atypeofelectricaldischargecalledslidingdischargewasdevelopedtogenerateplasmaaerodynamicactuationforflowcontrol.Athree-electrodeplasmasheetactuatordrivenbyrepetitivenanosecondpulseswithanegativeDCcomponentwasusedtogenerateslidingdischarge,whichcanbecallednanosecond-pulseslidingdischarge.Thephenomenologyandbehaviouroftheplasmasheetactuatorwereinvestigatedexperimentally.Dischargemorphologyshowsthattheformationofnanosecond-pulseslidingdischargeisdependentonthepeakvalueoftherepetitivenanosecondpulsesandnegativeDCcomponentappliedontheplasmasheetactuator.Comparedtodielectricbarrierdischarge(DBD),theextensionofplasmainnanosecond-pulseslidingdischargeisquasi-diffusive,stable,longerandmoreintensive.TestresultsofparticleimagevelocimetrydemonstratethatthenegativeDCcomponentappliedtoathirdelectrodecouldsignificantlymodifythetopologyoftheflowinducedbynanosecond-pulseDBD.Bodyforceinducedbythenanosecond-pulseslidingdischargecanbeapproximatelyintheorderofmN.BoththemaximumvelocityandthebodyforceinducedbyslidingdischargeincreasesignificantlyascomparedtosingleDBD.Therefore,nanosecond-pulseslidingdischargeisapreferableplasmaaerodynamicactuationgenerationmode,whichisverypromisinginthefieldofaerodynamics.

简介：Inrecentyears,actuatorsbasedoncarbonnanotube(CNT)orgraphenedemonstrategreatpotentialapplicationsinthefieldsofartificialmuscles,smartswitches,robotics,andsoon.TheelectrothermalandphotothermalbendingactuatorsbasedonCNT/grapheneandpolymercompositesshowlargebendingactuations,whicharesuperiortotraditionalthermaldrivenactuators.However,theinfluenceofmaterialparameters(thickness,temperaturechange,etc.)ontheactuationperformanceneedstobefurtherstudied,becauseitisacriticalpointtothedesignandfabricationofhigh-performanceactuators.Inthiswork,finiteelementanalysis(EEA)isemployedtosimulatetheactuationperformanceofCNT/polymeractuator,whichhasabilayerstructure.Themainfocusofthisworkistodesignandtooptimizematerialparametersbyusingcomputationalmethod.FEAsimulationresultsshowthateachlayerthicknessofactuatorhasanimportantinfluenceontheactuationdeformation.Amaximumcurvatureof2.7cm~(-1)isobtainedbysimulation,whichismuchlargerthanmostoftheactuatorcurvaturereportedinpreviousexperiments.Whatismore,largertemperaturechangeandlargerdifferenceofcoefficientofthermalexpansion(CTE)betweentwolayerswillresultinlargerbendingactuation.ThisstudyisexpectedtoprovidevaluabletheoreticalreferenceforthedesignandrealizationofCNT-basedthermalactuatorwithultra-largeactuationperformance.

简介：易于不明确的致动器差错和外部骚乱的未知非线性的系统的一个类将在模糊近似理论的帮助下在这篇论文被学习。用走技术的背，一条新奇适应模糊控制途径被建议在操作期间提供不明确的致动器差错并且尽管系统不能被反馈线性化，处理外部骚乱。考虑差错作为有效性和lock-in-place的两损失被建模(在某未知地方粘住)。建议控制计划能保证是的靠近环的系统的所有信号，这被证明最终一致地半全球性跳了并且在系统输出和引用信号之间的追踪的错误收敛到零的一位小邻居，尽管象致动器差错和外部骚乱一样的控制系统的非线性的函数都是未知的。模拟结果表明控制途径的有效性。

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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。