简介：ThispaperdealswiththeproblemoftheabsolutestabilityforgeneralneutraltypeLurieindirectcontrolsystemsbyLyapunovmethodandlinearmatrixinequality(LMI)technique.Delay-dependentsufficientconditionsfortheabsolutestabilityarederivedandexpressedasthefeasibilityproblemofLMI,whichcanbeeasilysolvedbyMatlabToolbox.Finally,someexamplesareprovidetodemonstratetheeffectivenessofproposedmethod.

简介：Somenewlinearmatrixinequality(LMI)representationsfordeley-independentanddelay-dependentstabilityconditionsareobtainedbyintroducingadditionalmatricesandeliminatingtheproductcouplingofthesystemmatricesandtheLyapunovmatrices.Theresultsimproveconservativenessofthegivenconditionsfortheanalysisandthedesignoftime-delaysystemswithpolytopic-typeuncertainty.

简介：Thispaperaddressesthedesignproblemofrobustiterativelearningcontrollersforaclassoflineardiscrete-timesystemswithnorm-boundedparameteruncertainties.Aniterativelearningalgorithmwithcurrentcyclefeedbackisproposedtoachievebothrobustconvergenceandrobuststability.Thesynthesisproblemoftheproposediterativelearningcontrol(ILC)systemisreformulatedasaγ-suboptimalH-infinitycontrolproblemviathelinearfractionaltransformation(LFT).AsufficientconditionfortheconvergenceoftheILCalgorithmispresentedintermsoflinearmatrixinequalities(LMIs).Furthermore,thelineartransferoperatorsoftheILCalgorithmwithhighconvergencespeedareobtainedbyusingexistingconvexoptimizationtechniques.Thesimulationresultsdemonstratetheeffectivenessoftheproposedmethod.

简介：Themaincontributionofthispaperistopresentstabilitysynthesisresultsfordiscrete-timepiecewiseaffine(PWA)systemswithpolytopictime-varyinguncertaintiesandfordiscrete-timePWAsystemswithnorm-boundeduncertaintiesrespectively.Thebasicideaoftheproposedapproachesistoconstructpiecewise-quadratic(PWQ)Lyapunovfunctionstoguaranteethestabilityoftheclosed-loopsystems.ThepartitioninformationofthePWAsystemsistakenintoaccountandeachpolytopicoperatingregionisouterapproximatedbyanellipsoid,thensufficientconditionsfortherobuststabilizationarederivedandexpressedasasetoflinearmatrixinequalities(LMIs).Twoexamplesaregiventoillustratetheproposedtheoreticalresults.

简介：H-infinifty可变结构控制被介绍因为单个Markov与错配的围住标准的不确定性交换了系统；错配的围住标准的外部骚乱。给定的切换的表面上的滑动模式动力学是常规的，这被显示出，没有推动，；随机的联盟者马厩；满足H无穷性能。一个可变结构控制器被设计保证系统轨道在一些有限时间收敛到线性切换表面。最后，一个数字例子被解决显示出有效性；理论结果的正当。

简介：Anewdesignschemeofstableadaptivefuzzycontrolforaclassofnonlinearsystemsisproposedinthispaper.TheT-Sfuzzymodelisemployedtorepresentthesystems.First,theconceptoftheso-calledparalleldistributedcompensation(PDC)andlinearmatrixinequality(LMI)approachareemployedtodesignthestatefeedbackcontrollerwithoutconsideringtheerrorcausedbyfuzzymodeling.SufficientconditionswithrespecttodecayrateαarederivedinthesenseofLyapunovasymptoticstability.Finally,theerrorcausedbyfuzzymodelingisconsideredandtheinput-to-statestable(ISS)methodisusedtodesigntheadaptivecompensationtermtoreducetheeffectofthemodelingerror.Bythesmall-gaintheorem,theresultingclosed-loopsystemisprovedtobeinput-to-statestable.Theoreticalanalysisverifiesthatthestateconvergestozeroandallsignalsoftheclosed-loopsystemsarebounded.TheeffectivenessoftheproposedcontrollerdesignmethodologyisdemonstratedthroughnumericalsimulationonthechaoticHenonsystem.

简介：本文在Birkhoff框架下，采用离散变分方法研究了非Hamilton系统-Whittaker方程的数值解法，并通过和传统的Runge—Kutta方法进行比较，说明了在Birkhoff框架下研究非Hamilton系统可以得到更加可靠和精确的数值结果．

简介：通过建立push-over分析方法中的等效单自由度体系，分析得到钢一混凝土组合框架结构的等延性需求谱．利用有限元软件对组合框架进行非线性静力推覆分析，基于位移模式把多自由度体系转换为等效单自由度体系，建立其等效加速度与等效位移曲线．按现行抗震规范建立组合框架结构谱加速度与谱位移曲线，从而对该类结构进行抗震评估．用非线性动力时程分析方法对本文提出方法进行了比较，验证了该方法的可靠性．

简介：根据古典阴阳互补和现代对偶互补的基本思想，通过罗恩提出的一条简单而统一的新途径，系统地建立了平面框架结构折线型弹塑性动力学的各类非传统Hamilton型变分原理．文中首先给出平面框架结构折线型弹塑性动力学的广义虚功原理的表式，然后从该式出发，不仅能得到平面框架结构折线型弹塑性动力学的虚功原理，而且通过所给出的广义Legendre变换，还能系统地成对导出平面框架结构折线型弹塑性动力学的5类变量分原理的互补泛函，以及1类变量和相空间非传统Hamilton型变分原理的泛函．同时，通过这条新途径还能清楚地阐明这些原理的内在联系．