第二章--固体表面特性及固气

1MOOG2MOOGOverviewWhatisaservo?Nozzle(x2)Flapper3MOOG•?••.G7614MOOGComponents1.3.4./2.5MOOGPilotStages4(5?):Servojet®(LFM)6MOOGNozzleFlapper7MOOG-2-1NozzleFlapper8MOOGNozzleFlapper9MOOGNozzleFlapper10MOOGNozzleFlapper11MOOGAFSANozzleFlapper12MOOGNozzleFlapper13MOOGNozzleFlapper14MOOGNozzleFlapper15MOOGG761SeriesG631SeriesNozzleFlapperMOOGD765Series16MOOGJetPipe17MOOGTechnologyServoJet®18MOOGPermanentMagneticFluxCoilInducedMagneticFluxPermanentMagneticFluxandCoilInducedMagneticFluxServoJet®19MOOG(LFM)TechnologyCenteringSpringsLinearForceMotor20MOOG21MOOG6+PEThreaded22MOOG23MOOG24MOOGFeedbackƒEFB–ƒMFB–25MOOGMechanicalFeedbackCoilCurrentNSPointofRotationMagneticForceCoilCurrentHydraulicForceHydraulicForceFlapperMovementSpoolTravel26MOOGMechanicalFeedbackFeedbackMechanical27MOOGServoJetOperationElectricalFeedbackEFB28MOOGElectricalFeedbackFeedbackElectrical29MOOG/30MOOGMainStageBSA(BSA)31MOOGNozzleFlapper32MOOGBodySpoolAssy33MOOGLinearityProportionalSpoolPositionControl34MOOGServovalveTermsTerminology•Null•NullBias•NullShift35MOOGServovalveTerms•--Terminology•Threshold36MOOG•ZeroLap,Axiscut,Line-on-Line•Overlap,Undercut•Underlap,OvercutLapTypes-NullCutTerminologyServovalveTerms37MOOGServovalveTerms•Polarity•RatedSignal•RatedFlow•FlowgainTerminology38MOOG•PressuregainTerminologyServovalveTerms39MOOGServovalveTerms•LoadPressureDrop•ValvePressureDropTerminology1400400ltsvPPPP−−=)(40MOOGDynamicTermsCommandOutputAmplitudeOutputDelayActualOutputT(t,sec)CommandFrequency,Hz:1/T(sec-1)Terminology41MOOGActualOutputCommandAmplitudeRatioAR=20log10()AR,measuredindecibels(dB),isderivedfromthefollowingmathematicalcalculation:-6dB50%lossLogarithmicScaleTerminology42MOOGPhaseLagLogarithmicScale90ophaselagequalsthenaturalfrequency(ωn)forsmallsignalinputs(10%)Terminology43MOOGMeasurementtoposition()……..usuallyfromØref.point!Terminology44MOOGLinearityResponsetimeThresholdHysteresisNullshiftOperatingpressure45MOOGThankyou!