多元氣體配氣儀設計.pdf

1、天津大學碩士學位論文多元氣體配氣儀設計姓名：黃一祥申請學位級別：碩士專業(yè)：精密儀器及機械指導教師：曾周末20090501ABSTRACTMultigasblendingdeviceplaysallimportantroleinairqualitymonitoringItsdegreeofaccuracyhasadirectimpactonairqualitymonitoringdataBasedontheresearchofgasble

2、ndingtechnique，theprincipleof1TDSSflowblendingandfuzzycontrolalgorithms，thispapermainlyintroducesanautomaticmultigasblendingdevicebasedOnmassflowImthodMajorissuesofthepaperareasfollows：Tl】eadvantagesanddisadvamagesofvari

3、ousgasblendingprogramswereanalysedandComparedandselectofsuitableschemeforlowconcentrationblendingusingthedynamicflowmatchingmethodBuildinganossflowcomrollerbasedonmultigasblendingdeviceARM7procesSorisemployedtoachievefas

4、tandaccuratecontrolofgasflowanditsbuiltinhardwaremultiplierscanachievearapiddataoperationandimprovetheoperationalspeedandprecisionofthesystemMeasurementofmassflowcon行olierbearslittlerelationtotemperaturevariationandpress

5、tnechangesCompletesystem’ShardwarecircuitdesignanddebugthecircuitsandachieveagoodresultTllecircuitsincludeA／D、D／Aconversioncircuits，keybordcircui_t，LCDciteuitsolenoidvalveekeuitandSOonInthecontrolalgorithmaccordingtOchar

6、acteristicsofcontrolobjectatwodimensionalfuzzycomrollerisdesignedtoimprovethereactionspeedofthesystembyinputtingthedevmtionanditsvariationratebetweenthedetectedvalueofflowandsetvalueoftheratetothemassflowcontrollertocont

7、rolthevolumeofoutputn℃fuzzycontrollercanimprovethesystem’SreactionspeedIntheMatlabenvironmentFuzzyTooboxandSimulinktoolboxareappliedforcontrolsystemsimulationwiththeresultsshowingthatthesystem’srobustness，stabilityandcon

8、troleffectaresatisfactoryInlightofthedesignsofallfunctionalmodulesinthesystemthesystemisoptimizedwithmultitaskprogrambyemployinguC／OS一Ⅱastheoperatingsystemandthishelpsthesystemrealizefriendlyinterfaceandexcellentsignalac