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1、華南理工大學(xué)畢業(yè)設(shè)計(jì)（論文）外文資料ANovelFuzzyControllerDesignBasedonPIDGainsfHVACSystemsLvHongliDuanPeiyongJiaLeiSchoolofInfmationElectricalEngineeringSchoolofControlScienceEngineeringShongJianzhuUniversityShongUniversityJi’nanShongProv

2、inceChina250101Ji’nanShongProvinceChina250061hllv@sdjzu.ractTheHeatingVentilatingAirConditioningsystems(HVACsystems)aretypicalnonlineartimevariablemultivariatesystemswithdisturbancesuncertainties.Anewfuzzycontrolstrategy

3、basedonthePIDparameterstuningtocontrolHVACsystemsisproposedinthispaper.IttakesfulladvantageofmaturetechnologiesofPIDcontrollertoimprovethedesignoffuzzycontroller.Themathematicalanalyticalexpressionofparametersbetweenfuzz

4、ycontrollersgainscoefficientsofPIDcontrollersisgotbasedonthestructureanalysisoffuzzycontrollers.thefuzzycontrollerisdesignedthroughgainstuningofPIDcontrollerbasedtheanalyticalrelations.Thenthisfuzzycontrollerwasappliedin

5、totemperaturecontrolinHVACsystems.ThesimulationtestresultsshoweditiseffectivecomparedwiththeconventionalPIDcontroltheproposedfuzzycontrolalgithmhaslessovershootshtersettingtimebetterrobustnessetc.IndexTermsFuzzycontrolSt

6、ructureanalysisRobustnessHVACsystemsI.INTRODUCTIONModernprocesscontrolproblemsintheprocessindustriesaredominatedbynonlineartimevaryingbehavidisturbancesuncertainties[1].Howevermethan90%plantsarecontrolledbythewellestabli

7、shedPIDcontrollersinindustrialautomationprocessuntiltoday[2].MoverconventionalPIDcontrollershavegonethroughatechnologicalevolutionbecausemanysophisticatedalgithmshavebeenusedtoimproveitswkunderdifficultconditions.Especia

8、llyfuzzylogicinferencesneuronwkbasedonselftuningschemesofPIDcontrollershavealsobeenproposedtoenhancethecontrolperfmance.QiangBietalgaveanadvancedautotuningPIDcontrollerthenapplieditintoHVACsystemssuccessfully[3].Hanxiong

9、LiproposedanimprovedrobustfuzzyPIDcontrollerwithoptimalfuzzyreasoning[4].ButtheycannotchangethelinearessenceofPIDcontrollers.Fuzzylogiccontroltechniquebasedontheconceptofthefuzzyalgithmby華南理工大學(xué)畢業(yè)設(shè)計(jì)（論文）Generallythemembers

10、hipfunctionsoftwoinputVariablese△eusedtriangularshapesthemembershipfunctionsofoutputvariablesuusedsingletonfuzzysets.Themembershipfunctionsofinputvariablese△earedefinedinfigure2.Thefuzzyinferencerulebasesinnominalcontrol

11、lerusethefollowingfourrules:2.2DesignofnmalizedfactsThefuzzycontrollerinfigure3isusedtocontroltheaboveFOPDTprocess.Thenominalfuzzycontrollerisusedineachfuzzycontroller.Buttheinputvariablesoffuzzycontrollere(n)△e(n)arenma

12、lizedbythenmalizedGeiG△eibefefuzzification，whilei=12.Theoutputvariablesoffuzzycontrolleru(n)△u(n)arenmalizedbythenmalizedfactsGuG△uafterdefuzzification.Thatise△Gei△e(n)△e△G△ei△△e(n)u(n)△Gu△u△u(n)△G△u△△u(2)wherei=12e△eu△u

13、△[11].Themembershipfunctionsofbothinputvariablese△eoutputvariablesu△uareeachdefinedthesameasbefe.Bothoftwofuzzyinferencerulebasesusethenominalfuzzyrules.Infuzzycontroller2theoutputvariableuisinsteadof△uinfuzzyrules.Infuz

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