多元?dú)怏w配氣儀設(shè)計(jì).pdf

1、天津大學(xué)碩士學(xué)位論文多元?dú)怏w配氣儀設(shè)計(jì)姓名：黃一祥申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：精密儀器及機(jī)械指導(dǎo)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