2002 modelling and nonlinear control of a low-power gas turbine

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1、ModellingandNonlinearControlofaLow-powerGasTurbine(Theses)writtenbyPiroskaAilerSupervisor:Dr.ImreSántaDepartmentofAircraftandShipsBudapestUniversityofTechnologyandEconomicsProf.KatalinHangosDepartmentofComputerScienceUniversityofVeszprémSystemandControlLaboratoryComputerandAutomationRes

2、earchInstituteHungarianAcademyofSciencesDepartmentofAircraftandShipsBudapestUniversityofTechnologyandEconomicsBudapest,Hungary20021MotivationandaimoftheresearchworkRecently,therehasbeenagrowingneedforcontrolsystemsofgastur-bineenginesbecauseoftheimportanceoftheirapplicationareas(avi-ati

3、on,electricpowertrade,gastransportandmilitaryapplication)andbecauseofthedemandsontheiroperationandthesafetyrequirementsofthem.Thescopeoftheirdutieshasbeenwidenedandtherequire-mentsontheiraccuracy(trackingofthecharacteristicswithmaximumeciency)hasalsobeenincreased.Fortunately,atthesamet

4、ime,theareaofcontroldesignmethodologyhassignicantlyimproved,andnon-lineartechniquesaregainingmoreandmoreground[6]inadditiontothetraditionallinearmethods.Thisdevelopmenthasspecialimpor-tanceincaseofprocess-(forexamplethermodynamical)systems[5]aswellasinthecaseofelectricalandmechanicalsy

5、stems.Fromthepointofviewofdynamicmodelling,gasturbinescanbere-gardedasamixedthermodynamical-mechanicalsystems.Thedynamicconservationbalanceandthealgebraicequationsofthemodelarenon-linear,sotheyrepresentacomplexproblembothformsystemanalysisandcontrolpointofview.Therefore,themostcommonway

6、toperformdynamicanalysisandcontroldesignistoapplyalocallylinearizedmodelaroundanoperatingpointinsteadofconsideringanonlinearmodel.Ontheotherhand,newmathematicalandcontrolmethodsandtoolshasrecentlycametothefrontoftheresearchandweredevelopedwhichareabletohandlenonlinearsystemsandmodelsusi

7、ngspecialnonlineartechniques.Thustheresultsofthedynamicanalysisofnonlinearmodelscanbeproperlyappliedtononlinearcontroldesign[6],[10].Basedonthesefactstheaimoftheresearchworksummarizedinmydissertationwastoinvestigatethepossibilityofdesigninganonlinearcontrollersatisfyingprescrib