简介:Thispaperpresentsareal-timemechanismtotoleratefaultsoccurringinawindturbine(WT)system.ThissystemiscomposedofaFASTcodedsimulatordesignedbytheU.S.NationalRenewableEnergyLaboratory.Thedemonstratedmechanismliesunderthetaxonomyofactivefault-tolerantcontrol(FTC)systems,namelyonlineredesignbasedapproach.Intheproposedapproach,wedonotuseanyaprioriinformationaboutthemodeloftheturbineinreal-time.Infact,weuseonlinemeasurementsgeneratedbytheWT.Basedonthegivencontrolspecifications,andtheobservedmeasurementanoccurredfaultisaccommodatedbyreconfiguringtheonlinecontrollersuchthattheWTgeneratesratedpowerevenunderfaultyconditions.Second,noexplicitfaultdiagnosis(FD)moduleisusedinthisapproach.Asaresult,issuesofmodeluncertainty,falsealarms,etc.associatedwithanintegratedFDandcontrollerreconfigurationapproachtoFTCsystemsarenotexperiencedhere.
简介:Pre-Botzinger复合体中兴奋性神经元节律性簇放电与呼吸节律的产生关系密切.泄漏电流对神经元簇放电具有重要的调节作用.本文利用双参数分岔分析和快慢变量分离等方法,研究了泄漏电流对耦合神经元簇同步模式及其转迁机制的影响.结果表明,在不同初始条件下,当泄漏电导改变时耦合神经元分别表现为同相“fold/homochnic”型、“subHopf/homoclinic”型和反相“fold/foldcycle”型和“subHopf/foldcycle”型簇放电.本文的研究为进一步探索呼吸节律的产生机制提供了一些见解.