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1、ASimplePIDControllerwithAdaptiveParameterinadsPIC;CaseofStudyJoãoChaínho,PedroPereira,SilvianoRafael1andA.J.Pires11LabSEI-EscolaSuperiordeTecnologiadeSetúbalInstitutoPolitécnicodeSetúbal/CampusdoIPS,Estefanilha,2914-508Setúbal,PortugalTelef:+351265790000,e-mail:
2、srafael@est.ips.ptAbstract:ThemaingoalofthisworkconsistsintheThisworkpresentsaproposalthatcontributestodevelopmentandimplementationofadiscretePIDcontrollerreduceoreventopreventthealreadyreferredproblems.withfastresponseandparametersadaptationcapability,inanTheim
3、posedrequirementsare:fastresponse,donotneedautomaticway.ThiscontrollerisbasedonaclassicPIDwhereanytypeofpreviousadjustmentanduniversalityofaparametersadaptationalgorithmwasassociatedinordertocommunicationwiththesensors,automates(PLC)orcontrolaprocess.ThisPIDdono
4、trequireanykindofscadasystems(DCS).adjustmentorcalibrationfromtheoperator.FortheparametersadaptationonefuzzysystemwithaTakagi-Sugenoinferencemechanismwaschosenandsomesimplificationofthissystem2.PIDControlleralgorithmwasimplemented.Thesesimplificationshadthegoalo
5、fdecreasingtheprocessingtimeandthecontrollerresponseTheuseddiscretePIDcontrollerischaracterizedby(250ms),inordertocontrolfastprocesseswithoutlosingthefollowingequation(1).stability.ThedevelopedalgorithmwasimplementedinarecentdsPIC30F.te-e(t)(t-1)Keywordsu(t)=Kp(
6、t)e(t)+Ki(t)Tsek+Kd(1)k=0TsPIDController,AdaptiveParameter,Fuzzylogicsystem,controlsystems.Wheree(t)istheerrorofthesystemresponseinthetinstant,TsisthesignalsamplingperiodandKp,KiandKd1.Introductionaretheproportional,integralandderivativecontrollergains,respecti
7、vely.ThePIDcontrollerismuchusedinthecontrolloopsofindustrialprocesses.ItsparametersareneedtobeThisalgorithm,associatedwiththeerrorcalculation,adjustedinfunctionofthecontrolprocessandremainisofveryfastexecution,howeveritsparametersshouldunchangedduringitsregulara
8、ctivity.bepreviouslyandappropriatelyadjusted.ThestartupofthePIDcontrollerrequiresanotActually,therearevariouscalculationandparametersalwayssimpleworkintheparametersad
