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1、NASAFactsNationalAeronauticsandSpaceAdministrationDrydenFlightResearchCenterP.O.Box273Edwards,California93523Voice661-258-3449FAX661-258-3566pao@dfrc.nasa.govFS-2000-02-022DFRCF-15FlightResearchFacilityF-15HIDEClandingwithF/A-18chaseaircraft(NASAphotoEC91
2、-677-1)FlightresearchcarriedoutbyNASAwithahighlymodifiedF-15aircraftdemonstratedandevaluatedadvancedintegratedflightandpropulsioncontrolsystemtechnologiesthatwillhelpmakenext-generationaircraftmoremaneuverable,morefuelefficient,andsafertofly.TheNASAF-15wa
3、sthefirstaircrafttodemonstrateafullyintegratedinlet-engine-flightcontrolsystem,aself-repairingflightcontrolsystem,andapropulsion-onlyflightcontrolsystem.BackgroundNASAF-15835wasauniqueone-of-a-kindaircraftcalledtheF-15FlightResearchFacility.Itwashighlyins
4、trumentedandequippedwithanintegrateddigitalelectronicflightcontrolsystem.Itcouldbeflownoverabroadflightenvelopetocarryoutcomplexandsophisticatedresearchprojects.Itwasused,amongotherthings,todeveloptheAdaptiveEngineControlSystem(ADECS),Self-RepairingFlight
5、ControlSystem(SRFCS),PerformanceSeekingControl(PSC),andPropulsionControlledAircraft(PCA)system.1NASAobtainedtheF-15,anÒAÓmodel,fromtheU.S.Airhadadual-channel,fail-safedigitalflightcontrolsystemthatForceonJan.5,1976,anduseditformorethan25advancedcouldbepro
6、grammedinsuchhigh-ordercomputerlanguagesresearchprojectsinvolvingaerodynamics,performance,asPascal,Ada,andFORTRAN.ItwaslinkedtotheH009andpropulsioncontrol,controlintegration,instrumentationMilitaryStandard1553Bdatabuses,whichtiedallotherdevelopment,humanf
7、actors,andflighttesttechniques.electronicsystemstogether.AmongtheseprojectswasoneinwhichitservedasatestbedtoevaluateaerodynamicpressuresonSpaceShuttlethermalADECSprotectiontilesatspecificaltitudesandspeeds.ADECSÑAdaptiveEngineControlSystemÑtradedexcessHID
8、ECenginestallmarginforimprovedperformance.ThiswasachievedthroughtheintegratedandcomputerizedflightandThesystemthatwasdevelopedontheF-15toinvestigateandenginecontrolsystems.TheenginestallmarginÑthedemonstratemethodso
