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1、CivilAviationFlightUniversityofChinaAutopilotFlightDirectorSystems自动驾驶飞行指引系统AutopilotFlightDirectorSystems(AFDS)CivilAviationFlightUniversityofChinaItislogicaltointegratethetwosystems,theautopilotandtheflightdirector,intoacombinedautopilotflightdirectorsystem(AFDS)sothatcertainprocessingfun
2、ctionscanbeshared.Inamodernsystem,itisnormalfortheAFDStocontainaseparateFDcomputerthatprovidesdisplayinstructionstotheEFISsystem,andthesameinstructionstotheautopilotcomputer,whichthenconvertsthesignalstoappropriatecommandsfortheservos.AutopilotFlightDirectorSystems(AFDS)AFDSModeControlPanel
3、CivilAviationFlightUniversityofChinaAFDSModeControlPanelModeselectorsofthePushON/PushOFFtypearelocatedatvariouspositionsonthepanel.Eachselectorhasabarlightincorporatedintheswitchface,toindicatetheselection.ArmedandengagedselectionsaredisplayedontheADI,witharmedselectionsusuallyshowninwhiteo
4、ramber,andengagedmodesingreen.Figure3.9CivilAviationFlightUniversityofChinaAFDSModeControlPanel•FlightDirectorF/DON/OFFAflightdirector(F/D)switchisprovidedforeachpilot.WhenOFF,FDcommandbarsarewithdrawn.WhenfirstselectedON,thecommandbarswillbedisplayed,intheTake-Offmode(TO)ifontheground,orin
5、currentvaluesofVSandHDGHOLDifairborne.IntheTOmode,thecommandbarswillshowwingslevelandabout8°~10°ANU.Figure3.9CivilAviationFlightUniversityofChinaAFDSModeControlPanel•AutopilotAPEngageSwitchesTheautopilotisnormallyengagedintheCommand(CMD)mode.ExceptduringanILSapproach,onlyoneautopilotcanbeen
6、gagedatatime;selectionofanotherautopilotdisconnectsthefirst.PushingthesecondautopilotCMDswitchwhenintheapproachmodeengagestheremainingautopilotsat1,500ftradioaltitude,andarmstheautolandfunctionsofrunwayalignment,flare,landingandrollout.Figure3.9CivilAviationFlightUniversityofChinaAFDSModeCo
7、ntrolPanelDisengagebarTheDISENGAGEbaratthebottomofthepanelmustbeUPtoallowtheautopilotstobeengaged.BymovingtheDISENGAGEbardown,allthreeautopilotsaredisconnectedfromtheflightcontrolservos.Red(orYellow)stripisexposedwhenbarisdown.Figure3.9CivilAviationFligh
