嵌入式智能控制器在混凝投藥系統(tǒng)中的應(yīng)用.pdf

1、中南大學(xué)碩士學(xué)位論文嵌入式智能控制器在混凝投藥系統(tǒng)中的應(yīng)用姓名：李學(xué)賢申請學(xué)位級別：碩士專業(yè)：控制科學(xué)與工程指導(dǎo)教師：羅大庸20090501ABSTRACTCoagulantdosingprocessisthemostimportantpartinthedomesticroutinewatertreatmentprocedureItisahottopiconhowtoaddcoagulationaccuratelyincurrentwa

2、terindustryBecauseoftheaffectfactoroftherawwaterflowtheturbidityPH，temperatureandotherpollutions，theprocessofcoagulantdosageisaveryprocessoftime—delaynonlineartime—variation，manyinterferencefactorsAccordingtothesefactors

3、，inanalysisofthedomesticandforeigncoagulantdosingsystemsandthepracticalsituationinChina，thePaperfindoutahybirdcontrolstructurecombinatedwithExpertSystem(ES)andBPNNtoactivedosagecontrol，underthebackgroundofafactualproject

4、Inthecoagulantdosingcontrolalgorithm，feedforwardcompensationabilityofESiSusedtesolvetheinterferingfactorsofflowandturbiditymutationTurbiditybeforefilterasafeedbackvaluetoestablishtheexpertknowledgeandreasoningmechanismAc

5、cordingtodifferentrulestochoosedifferentcontolmodesThroughtheneuralnetworknonlinearmappingabilitytosolvethenon—lineareffectsofwatertreatment，rolllearningandfeedbacktolearntosolvethetimevaryingandtime—delayproblemsHowever

6、’ANNhasadisadvantageofslowconvergenceAnimprovedparticleswarmoptimization(PSO)algorithmisusedtooptimizetheBPNNandimprovetheconvergencespeedFinallytheintelligentalgorithmisappliedtoembeddedsystemTheembeddedsystemcontainsPX

7、A270microprocessorandotherhardware，usingWindowsCEastheoperatingsystemDeveloppingtheapplicationprogramonembeddedsystemplatform，thecontrollercommunicatewithboRomdevicesandappliedtoactualwatertreatmentindustryTheexperimente

8、xplainsthattheintelligentdosingcontrollercanimprovetheaccuracyofcoagulantdosageandsavethedosageTheWaterqualitycanreachthestandard，ithaswidestapplicationforegroundKEYWORDSCoagulantDosing，ExpertSystem，BPNeuralNetwork，PSO，E