模糊控制与神经网络方法研究

V24910699986092522001.2,,,12(BP)(PID)BPPIDBPPID3(1)PIPIDBPPI(2)PID,ABSTRACTInthispaper,thetheoriesoffuzzylogiccontrolandneuralnetworksisintroduced.Then,someshortcomingsoftheexistingmethodsoffuzzycontrolandneuralnetworksarepointedoutandimprovedupon.Differentmethodsofneuralnetworksandintegralneural-fuzzytechniqueareusedinthecontrolofatypicaltwo-orderlingeringsystem.Theeffectivenessofeachmethodisverifiedthroughsimulationtests.Themaincontributionofthisdissertationissummarizedasfollows:1.Throughimprovingthechoiceoflearningrateandimplementingonlineadjustmentofcontrolplus,asimpleandrapidsingle-nerveadaptivecontrolmethodwithlearningabilityisproposed,theeffectivenessofwhichisprovedbysimulation.2.BasedontheoriginalBPnetwork,someimprovementonerrorbackpropagationarithmeticismade.Theexecutingspeedofthealgorithmisincreasedthroughonlineadjustmentoflearningrate.CombinedwithtraditionalPIDcontrol,thismethodgeneratedtwointegralschemes:BPnetwork+PIDserialcontrolandself-confirmingcontrolofparametersofPIDcontrollerbasedonBPnetworkareconstructed.Applicationresultsinthecontroloftwo-orderlingeringsystemdemonstratetheeffectivenessofthetwomethods.3.Differentintegralneural-fuzzytechniquesareadoptedtoimprovethetraditionalsmithpredictivecontrolandmodelarithmeticpredictivecontrol,whichresultsincontrolsystemswithstrongrobustness.(1)TheoldPIDcontrolleroftheanteriorschemeissubstitutedbyimprovedPIfuzzycontrollerwithoptimalcorrectionfunction,andtheparametersofthesegmentofPIareadjustedonlinebyBPneuralnetwork.(2)Preservingtheintrinsicadvantageoftheposteriorscheme,apredictivefuzzycontrolsystemonneuralnetworkisconstructedbyreplacingtheoldpredictivemodelandPIDcontrollerwithwell-trainedneuralnetworkandtheimprovedfuzzycontroller.Theeffectivenessofthetwoschemesisverifiedbythesimulationresults.KeyWords:fuzzycontrol,neuralnetwork,lingeringsystem,backpropagation,predictivecontrol,integralneural-fuzzytechnique,robustness,.................................................................................................................1§1.1...............................................................11.1.1...................................................................................11.1.2...............................................................................21.1.3.......................................................................................41.1.4...............................................................5§1.2....................................................................................51.2.1..................................................................................61.2.2...........................................................................81.3.............................................................................................91.4................................................................................................10.....................................................................11§2.1.........................................................................................112.1.1.........................................................112.1.2................................................................20§2.2..........................................................................................222.2.1................................................................................222.2.2BP.......................25§2.3...................................................................34.......................................................................35§3.1.................................................................................353.1.1....................................................................353.1.2................................................................................................363.1.3........................................................................................383.1.4....................................................................................................40§3.2BPPID.....................................................................413.2.1BPPID....................................................423.2.2BPPKIKDKPID..............43§3.3..........................................................................................................49...........................................................50§4.1.....................................................................................................50§4.2..........................................................514.2.1.................................................................................514.2.2.........................................................................................534.2.3....................................................................................................56§4.3..............................................................604.3.1..........................................................................................................