Dynamic Model and Experimental Investigation of a

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1、78IEEE/ASMETRANSACTIONSONMECHATRONICS,VOL.9,NO.1,MARCH2004DynamicModelandExperimentalInvestigationofaPneumaticProportionalPressureValveMassimoSorli,GiorgioFigliolini,andStefanoPastorelliAbstract—AnonlineardynamicmodelofaHoneywellLu-Outletandcontrolrelativepressures.cifer-typeEPP3J-21-U-10

2、0-10(nowParkerP3P-R)pneumaticReferenceconditionsofabsolutepressures.proportionalpressurevalveisformulatedbymodelingthevalve’sReferencepressure.maininternalmechatronicdevicesinordertosimulateitsdynamicSupplyandventabsolutepressures.behaviorinthetimeandfrequencydomains,forseveraloperatingco

3、nditionsanddifferentdownstreamloads.MechatronicdesignThermodynamicconstantofair.andfunctionalityofthisvalvearecarefullyanalyzedbyconsid-Contactreactionforcesonplungers1and2.eringtheconditionsofitsinternaldevicesforeachofthethreeStandardabsolutetemperature.standardworkingconfigurationsofat

4、hree-wayproportionalReferenceconditionsofabsolutetemperature.valve.ThemainphysicalparametersintroducedinformulatingAbsolutetemperatureofairinsupplyandvent.thedynamicmodelwereidentifiedbymeansofanexperimentalinvestigation.Finally,theexperimentalandsimulateddiagramsinDeadvolumeinthecontrols

5、ervo-chamber.thetimeandfrequencydomainsarecomparedinordertovalidateVolumesofoutletandcontrolchambers.theproposedmodel,whichcanbeusedasageneralapproachforVoltageerror.modelinganypneumaticproportionalpressurevalvefeaturingaCompensatedvoltageerror.similarmechatronicdesignandinternalstructure

6、.Pulsewidthmodulated(PWM)controlsignalsforIndexTerms—Mechatronicdesign,modeling,pneumatics,pro-valvesand.portionalvalves.Externalpressuretransducervoltageoutput.Referenceinputvoltage.NOMENCLATUREDisplacement,velocity,andaccelerationofplunger1.Upperandlowerareasofplunger1.Displacement,velo

7、city,andaccelerationofplungerCriticalpressureratiosforvalvesand.2.Criticalratiosofsupplyandventorifices.Dampingcoefficientsofseals3and4.Conductancesofvalvesand.Viscousfrictioncoefficientsforplungers1and2.Controllercompensator.Standardairdensity.Conductancesofsupplya