资源描述:
《Adaptive fuzzy control for a class of nonlinear time-delay systems with unknown control direction》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Proceedingsofthe29thChineseControlConferenceJuly29-31,2010,Beijing,ChinaAdaptiveFuzzyControlforaClassofNonlinearTime-delaySystemswithUnknownControlDirection∗111211LIXiaoqiang,WANGDan,YAOYubin,LANWeiyao,PENGZhuohua,SUNGang1.MarineEngineeringCollege,DalianMaritimeUniversity,Dalian1
2、16026,P.R.China.E-mail:sxxqli@126.com2.DepartmentofAutomation,xiamenUniversity,Xiamen361005,P.R.China.Abstract:Afuzzyrobustadaptivecontroldesignschemeisdevelopedforaclassofuncertainnonlinearsystemrepresentedbyinput-outputmodelswithtime-delay.TheControlDirectionofthesystemisunknow
3、n.Byon-lineapproximatingtheunknownnonlinearfunctionswithfuzzylogicsystemsandusingNussbaumcontrolgaintechnique,thecontrollawandtheupdatelawareconstructed.BasedontheLyapunovstabilitytheory,itisprovedthatwiththeproposedcontrollawandupdatelaws,theclosed-loopsystemisguaranteedtobestab
4、leandthetrackingerrorconvergeswithadesiredprecision.Asimulationexampleispresentedtodemonstratethemethod.KeyWords:FuzzyControl,Time-delaySystem,UnknownControlDirection1INTRODUCTIONthegainsignisunknown,thestabilityproblemismoredif-ficult.Nussbaumcontrolgaintechniquewasfirstintroduced
5、Duringthelastdecades,agreatdealofprogressinthein[8]andithasbeenusedtosettlethecontrolproblemofev-feedbackcontrolofnonlinearsystemshasbeenachieved.Aterykindofthesystemwiththeunknowncontrolgainwhosethesametime,fuzzylogicsystemshavebeenfoundtobean[9-12]signisnotknown.usefultoolforso
6、lvingthenonlinearsystemcontrolproblems[1-3]Anotherchallengingproblemincontrolofnonlinearsys-withuncertaintyorun-modelleddynamics.Adaptivetemsistime-delay.Thecontrolproblemandthestabilitycontrolfornonlinearsystemswithparameteruncertaintyand[4-7]analysisofthesystemswithtime-delayar
7、edifficult.How-uncertainnonlinearityarestudiedbymanyresearchers.ever,time-delaycharacteristicsarefrequentlyencounteredIn[4],anadaptivefuzzycontrollerisdevelopedforaclassinvariousengineeringsystemssuchasinrecycledreactors,ofnonlinearsystemswithuncertainty.Thenonlinearsys-recycledst
8、oragetanks,nuclearreactors,rollingmillsa