简介：Inthispaper,nonlinearobserversareincorporatedintotheadaptivecontroltosynthesizecontrollersforaclassofuncertainnonlinearsystemswithunknownsinusoidaldisturbanceswhicharepresentedinmatchedandunmatchedforms.Inadditiontomagnitudesandphases,frequenciesofthesinusoidaldisturbancesneednotbeknownaswell,solongastheoverallorderisknown.Nonlinearobserversareconstructedtoeliminatetheeffectofunknownsinusoidaldisturbancestoimprovethesteady-stateoutputtrackingperformance-asymptoticoutputtrackingisachieved.Theadaptationlawisusedtoobtaintheestimateofallunknownparameters.Thepresenteddisturbancedecouplingalgorithmscandealwithmatchedandunmatchedunknownsinusoidaldisturbances.

简介：Adaptivecritic(AC)basedcontrollersaretypicallydiscreteand/oryieldauniformlyultimatelyboundedstabilityresultbecauseofthepresenceofdisturbancesandunknownapproximationerrors.Acontinuous-timeACcontrollerisdevelopedthatyieldsasymptotictrackingofaclassofuncertainnonlinearsystemswithboundeddisturbances.TheproposedAC-basedcontrollerconsistsoftwoneuralnetworks(NNs)-anactionNN,alsocalledtheactor,whichapproximatestheplantdynamicsandgeneratesappropriatecon...

简介：在这篇论文，稳定性和骚乱变细在效果被考虑的不明确的存取延期和包退学学生下面为联网的控制系统(NCS)的一个类发出。我们的目的是在延期和包退学学生率，系统稳定性和H_∞骚乱变细性质在下面被保存到需要的水平上发现条件。在这篇论文的Thebasic想法是提出象一个分离时间的交换系统的如此的联网的控制系统。然后NCS“稳定性和表演问题能为交换系统被归结为相应问题，它被学习十年了并且为很多结果在文学为哪个是可得到的。在这篇论文的技术在thediscrete时间基于最近的进步交换系统和片明智的Lyapunov函数。

简介：Thispaperproposesanewasymptoticattitudetrackingcontrollerforanunderactuated3-degree-of-freedom（DOF）laboratoryhelicoptersystembyusinganonlinearrobustfeedbackandaneuralnetwork（NN）feedforwardterm.Thenonlinearrobustcontrollawisdevelopedthroughamodifiedinner-outerloopapproach.TheapplicationoftheNN-basedfeedforwardistocompensateforthesystemuncertainties.Theproposedcontroldesignstrategyrequiresverylimitedknowledgeofthesystemdynamicmodel,andachievesgoodrobustnesswithrespecttosystemparametricuncertainties.ALyapunov-basedstabilityanalysisshowsthattheproposedalgorithmscanensureasymptotictrackingofthehelicopter＇selevationandtravelmotion,whilekeepingthestabilityoftheclosed-loopsystem.Real-timeexperimentresultsdemonstratethatthecontrollerhasachievedgoodtrackingperformance.