热工过程多模型控制理论与方法的研究

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1、华北电力大学（保定）博士学位论文热工过程多模型控制理论与方法的研究姓名：郭启刚申请学位级别：博士专业：热能工程指导教师：韩璞;王东风20070401华北电力大学博士学位论文摘要Abstractn圮thermal口rocesscontrolsystemisarathercomplicatednonlinearcontrolsystem．ManyadvanceAcontrolalgorithmhavebeenfoandtohavepreliminary，successfulapplicationsinthesystem．Somecontr01dimcu

2、ltieshavebeenovercome．Howner,theproblemsencounteredwiththechangeofcontrolledsystemIeadbyfrequent10adchange,arestillunsolved．Inordertogivesomehintsonthesolutionoftheseproblems，wehavestudiedinthisdissertationthemultiplemodelcontrolschemeanditsrelatedthe,odes．Ourstudyaddressesthe

3、followingtopics：1．hviewofthelargetime．delayandfasttime—varyingcharacteristicsofsteamtemperaturesysternofCirculatingFIuidizealBedBoiler(CFBB)，steamtemperaturepropertieseffeetedbyspray．waterandfeed-waterarestudiedindifferentsteamload．Multi-modelforward．feedbackgeneralizedpredict

4、ivecontrolisproposed．Thenewmethodhasabilltyofovercomingsomeshortcomingswhilesinegemodelused，andeliminatethecouplingpropertyfromfeed-watervarying．2．APID．PIDcnscadecontr01strate：gYiSpresentedbasedonmulti—modelcontrolstrategY．whichkeepsboththemeritofcascadeeontrolsystemandthatofm

5、ulti—modelcontr01．FixedProportional—Integral．DerivativefPID)controlisusedininnerloop．inordertoeliminatedisturbances．andtheouterloopisdesignedbymulti—modelPIDcontr01．11lcmethodofschedulingamongtheIocalmodelsisaccordingtoIX)wernetworkloadthatistheprimaryeffectfactor．Smoothswishi

6、srealizedusingfuzzyweightingfunction．Thisalgorithmissimpleandcanberealizedeasily．3．necharacteristicsofthesuper-heatedsteams3rstemarenonlineartime-varying、largeIneltiaandtime—delay．Basedonthis．amulti．modelIMC．PIDcascadecontrolstrategYispresented．111efixedmodelsaresctupatsometyp

7、icaloperatingpoints，thecorrespondingcontrollerisdesginedmeanwhile．Smoothswitchisrealizedbyusingfuzzyweightingfunction．ThedesginedsystemcankeeDthemeritofcascadecontrolsystemaswellasmultiplemodelcontr01．FixedPIDcontrollerisusedininnerloopinordertoelimitatedisturbances．thetime—de

8、layofinteraplantcanbeovercomebytheinternalmodelcontrollerofou