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《A Fuzzy-PID Controller with adjustable factor based on S7-300 PLC 基于S7 - 300的PLC模糊PID控制器调节因子》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、AFuzzy-PIDControllerwithadjustablefactorbasedonS7-300PLCAbstract:AFuzzy-PIDcontrollerwithadjustablefactorisdesignedinthispaper.Scalefactor’sself-adjustwillcometrue.FuzzycontrolalgorithmisfinishedinSTEP7software,andthendownloadedinS7-300PLC.WinCCsoftwarewillbeusedtocontrolthechange-tre
2、ndinrealtime.DatacommunicationbetweenS7-300PLCandWinCCisachievedbyMPI.TheresearchshowsthatthisFuzzy-PIDcontrollerhasbetterrobustcapabilityandstability.It’saneffectivemethodincontrollingcomplexlongtime-varyingdelaysystems.Keywords:fuzzy-PID,adjustablefactor,temperaturecontrol,MPI.1INTR
3、ODUCTIONTemperaturecontrolisveryimportantinindustrialproduction.Themostcommontemperaturecontrolobjectsinmodernindustryareboiler,electricfurnace,thecontrolsystemofsteamplantanddistillationcolumn(F.G.Hinskey,2004).Temperaturecontrolsystemgenerallyhasthecharacteristicoflargeinertiaanddel
4、ay,soit’sdifficulttoestablishmathematicalmodelexactly.Inindustrialproductionprocess,somecontrolmethodshavebeenemployed,suchasPIDcontrol(Bolat,E.D.,Erkan,K.,Postalcioglu,S.,2005),Smithpredictivecontrol(He,S.-Z.,Xu,F.-L.,Tan,S.,1992),Modelpredictivecontrol,Fuzzycontrol(Chia-FengJuang,Ju
5、ng-ShingChen,Hao-JungHuang,2004),Robustcontrol(Ingram,J.E.,Hodel,A.S.,Kirkici,H.,1997)Neuralnetwork(Khalid,M.,Omatu,S.etc1992).PIDcontrollerisstillwidelyusedinprocesscontrolfieldforitsmanyadvantages.Butforthetime-varyingprocesswithlargetime-delay,traditionalPIDalgorithmhasmanyshortcom
6、ings:thecontrolaccuracyislow,thestructureisdifficulttostabilizeandthealgorithmismoresensitiveinthematchdegreeofthemodels.Therefore,industrialprocesscontrolwhichhaslargetime-delayisstillarecognizeddifficultproblematpresent.Andforlargelag,time-varyingprocesswhoseobjectparameterschangeda
7、sworkingconditionandenvironmentchanged,itismoredifficulttocontrolit.Andforlargelag,time-varyingprocesswhoseobjectparameterschangeasworkingconditionandenvironmentchange,itismoredifficulttocontrolit.Fuzzycontrolhasthecharacteristicthatdoesn’tchargedwiththeobjectmodelandwithstrongrobust,
8、butco
