《航空工程技术英语》课件——Chapter 12 Flight Control +教学课件：Flight Control + Auto Flight Control.pptx

AutoFlightControlSystem航空工程技术英语

目录CONTENTSDFCS01AutoThrottleSystem02YawDamper03

AutoFlightControlSystemTheautomaticflightcontrolsystems(AFCS)consistsofthreeindependentsystems:digitalflightcontrolsystem(DFCS),yawdamperandautothrottlesystems.Thesesubsystemsprovideautomaticairplanestabilizationaboutthepitch,yawandrollaxisandcontroltheairplanewithselectedguidancefromradio,heading,flightmanagementcomputer(FMC),andairdatacomputer(ADC)inputs

DFCSPART01

1.DFCSTheDFCShasaModeControlPanel,twoflightcontrolcomputers(FCC),andactuatorinputstotheflightcontrolsystem.EachFCCcandoallofthefivefunctions:Theautopilotfunctionsmightbeperformedintwodifferentmodes:CMD(Command)ModeCWS(ControlWheelSteering)Mode.TherearetwoAutopilotsinstalled,AutopilotAfromFCCAandAutopilotBfromFCCB.TheFCCsreceiveinputsfromseveralsystemssuchastheADIRS(AirDataInertialReferenceSystem)andtheFMC(FlightManagementComputer)andsendscommandstotheaileronandelevatoractuatorswhichcontrolthemovementoftheaileronsandelevatorsandthereforetheflightpathoftheairplane.MachTrimAutopilotFlightDirectorAltitudeAlertSpeedTrim

1.DFCSIntheCMDmode,theFCCcalculatesthecommandswhicharesenttotheautopilotactuators.TheactuatorscausetheinputstothePCUs(PowerControlUnits)tomoveandthuscontroltheaileronsandtheelevator.WhenyouengageanautopilotfromtheMCP,theautopilotcontrolstheairplaneattitudethroughtheseflightphases:IntheCWSmode,forcetransducersunderneaththecontrolcolumnssensecontrolwheelandcontrolcolumnforcesfromthepilotsandsendthesesignalstotheFCC.TheFCCsendsthecommandstotheautopilotactuatorstocontroltheaileronsandelevator.TheFCCalsosendscommandstothestabilizertrimelectricactuatortotrimthestabilizer.ClimbCruiseDescentApproachGo?AroundFlare

1.DFCS

1.DFCSThe