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1、320InternationalJournalofControl,Automation,andKeZhang,BinJiang,andVincentCocquempotSystems,vol.6,no.3,pp.320-326,June2008AdaptiveObserver-basedFastFaultEstimationKeZhang,BinJiang*,andVincentCocquempotAbstract:Thispaperstudiestheproblemoffaultestimationusingadaptivefaultdiagnosisobserver.Afas
2、tadaptivefaultestimation(FAFE)approximatorisproposedtoimprovetherapidityoffaultestimation.Thenbasedonlinearmatrixinequality(LMI)technique,afeasiblealgorithmisexploredtosolvethedesignedparameters.Furthermore,anextensiontosensorfaultcaseisinvestigated.Finally,simulationresultsarepresentedtoillu
3、stratetheefficiencyoftheproposedFAFEmethodology.Keywords:Actuatorandsensorfault,adaptiveobserver,fastfaultestimation,faultdiagnosis.1.INTRODUCTIONaccommodation,FDImodulemustdetectandisolatethefaults,aswellasestimatethem.FDIisthefirstIncreasedproductivityrequirementsandstringentstepinfaultacco
4、mmodationtomonitorthesystemperformancespecificationsleadtomoredemandinganddeterminethelocationofthefault.Then,faultoperatingconditionsofmanymodernengineeringestimationisutilizedtoon-linedeterminethesystems.Suchconditionsincreasethepossibilityofmagnitudeofthefault.Finally,usingtheobtainedsyste
5、mfailures.Sensor,actuatororplantfailuresmayfaultinformation,anadditivecontrollercanbedrasticallychangethesystembehavior,resultingindesignedtocompensateforthefault.degradationoreveninstability.InordertoimproveSomeresearcherspaymoreattentiontoadaptiveefficiency,thereliabilitycanbeachievedbyfaul
6、tfaultdiagnosisobserverapproach[8,10-14].However,tolerantcontrol(FTC),whichreliesonearlydetectionthemainproblemsintheuseofadaptivefaultoffaults,usingfaultdetectionandisolation(FDI)diagnosisobserverarefirsttoachievetheprocedures.SoFDIhasbecomeanattractivetopicandperformancerequirementsoffaulte
7、stimation,i.e.,receivedconsiderableattentionduringthepasttworapidityandaccuracy,andsecondtofulfillthedecades.Fruitfulresultscanbefoundinseveralstringentconstraint[15]andsolvethemtoobtaintheexcellentbooks[1-3],surveypapers[4-6]anddesignparamet
