PEC飞行器术语汇总.docx
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PEC飞行器术语汇总
PEC航空英语证书考试-飞行器术语
Abort-Earlymissionterminationduetofailure(s)thatprecludemissioncontinuation.ReturntoEarthofthecrewisaccomplishedinsidethespacecraftdesignedforEarthreturnandlanding(seeAborttoEarth,AborttoOrbit).
AborttoEarth-Earlymissiontermination,withdirectreturntotheEarth'ssurfaceastheimmediateobjective.
AborttoOrbit-Anearlymissionterminationthathasanimmediateobjectiveofplacingtheflightsystem(CEV)inEarthorbit,priortoreturntotheEarth'ssurface.
AcceptanceTests-Testsconductedtoverifythathardwaredeliveredtohigher-levelassemblypriortodeliverytotheflighttestandpriortodeliverytotheoperationalinventoryorforoperationalsparesconformstoprogramrequirements.Acceptancetestingalsoincludesfinal"sell-off"ofthefullyassembledCEV.
Annunciate-Toprovideavisual,tactileoraudibleindication.
Ascent-ThetimefromliftofffromtheEarth'ssurface,tospacecraftinsertionintoEarthorbit.
AscentAbort-Earlymissionterminationduetofailure(s)thatprecludemissioncontinuation.ReturntoEarthofthecrewisaccomplishedinsidethespacecraftdesignedforEarthreturnandlanding.
AttitudeandPointingConstraints-Constraints,restrictionsorrequirementsonthevehiclesorientationinspace.Thesemayincludethingssuchasrequirementstoorientasensorataspecifictarget(suchasaspecificstar),oraconstraintlimitingtheamountoftimeavehicleaxiscanbeorientedtowardaparticulartarget(suchasthesun,ordeepspace).Theyalsoincludeconstraintsorrestrictionsonmaneuverratesandattitudedeadbands.
Automatedcontrol-Automatic,asopposedtohumanoperationorcontrolofaprocess,equipmentorasystem;orthetechniquesandequipmentusedtoachievethis.Automationisthecontrolorexecutionofactionswithnohumaninteraction.Automatedcontroldoesnotexcludethecapabilityformanualintervention/commanding,butmanualintervention/commandingisexplicitlynotrequiredtoaccomplishthefunction.
Autonomousoperations-Definedasaflightvehicleoperatingindependentofexternalcommandsorcontrol(i.e.,commandsfrommissioncontrolonEarth).Autonomousoperationscanbefullyautomatedorrequiresomedegreeofmanualcommanding/interventionbytheonboardcrew.Autonomousoperationsthatdonotrequireonboardcrewinvolvementare,bydefinition,automated;therefore,theterm"autonomousoperations"usedintherequirementsassumesonboardcrewinvolvementintheoperations.
Berthing-AmethodofmatingtwoormoreExplorationelementsinspace.Duringaberthingoperation,thetwoelementsaremechanicallyconnectedpriortothestructuralcaptureandfinalmating(i.e.,oneelementgrapplestheotherwitharoboticarm).Oneelementcontrolsthetrajectoryandattitudeoftheotherelementforthecontactandcapture.Finalmatingisgenerallyperformedbytheberthingmechanism.
CatastrophicHazard-Aconditionthatmaycausedeathorpermanentlydisablinginjury,majorsystemorfacilitydestructionontheground,ormajorsystemsorvehicledestructionduringthemission.
CEVAcquisitionStrategyPhase1-ThisistheformulationphasefortheCEV.Thisphasebeginsin2005withcontractawardtomultiplecontractorsandcontinuesthroughPDRforeachdesign.
CEVAcquisitionStrategyPhase2-ThisistheimplementationphasefortheCEV.Thisphasebeginsin2008withdownselecttoonecontractorandcontinuesthrough2014,withthefirsthumanlaunchoftheCEV.Thisvehicleisaspiral2-capablevehiclethatalsosatisfiesallspiral1capabilities.
CEVAcquisitionStrategyPost-Phase2-Thisisboththeinitialoperationsphaseandthespiral3upgradephasefortheCEV.Theinitialoperationsphasebeginsinthenegotiationoffirmoptionsintothe2008contractforadditionalCEVflightandalsoincludesthesustainingengineeringoftheproductionvehicles.Thespiral3upgradephasehasthecontractorupgradetheirCEVdesigntoincorporateallspiral3capabilities.Thisphasewillnotoccurifthecontractorincorporatedallspiral3requirementsintheiroriginaldesign.
CEVSystem-IncludesthespacecraftandallCEV-uniquegroundsystemsneededtosupportstandaloneandintegratedoperations.
CEVSystemFlightTests-Operatingflighttestsduringthedevelopmentphaseusedtoqualifythattheintegratedflightvehiclesystem(includingthelaunchvehicle)andgroundsupportequipment,asprocuredandverifiedbytheacceptancetestprocedures,conformtotheConstellationprogramrequirements.
CEVSystemLevelRequirements(CEV)-RequirementsthatwillbedevelopedbyConstellationSE&IinconjunctionwiththeCEVprimecontractors.Includesperformance/functionalrequirementsfortheCEVsystemandExternalInterfaceRequirements(EIRD)tootherConstellationsystems.
Commercial-Off-The-Shelf(COTS)-Commerciallyavailableproductsthatcanbepurchasedandintegratedwithlittleornocustomization,thusfacilitatingcustomerinfrastructureexpansionandreducingcosts.
Component-Anelementarydeviceorpieceofequipmentthatisabasicpartofasubsystem.
(Constellation)GroundSupportSystem-ThissystemprovidesallConstellationcommonground-basedcapabilities(e.g.,missioncontrol,launch-siteprocessing)neededtoexecuteExplorationmissions.ItdoesnotincludegroundbasedIn-spaceSupportSystems.FacilitiesandcapabilitiesthatareuniquetoasingleExplorationsystem,suchastheCTS,willbeincludedaspartofthesystemitsupports.
ConstellationSystemofSystems-Thesystemofsystemsthatincludesallcapabilitiesandsystemsthatarecriticaltoenablingsafeandsuccessfulhumanandroboticmissionsacrossthesolarsystem.
Consumables-Resourcesthatareconsumedinthecourseofconductingagivenmission.Includespropellant,power,habitabilityitems(e.g.,gaseousoxygen),andcrewconsumables.Limitedquantityitems(suchaspropellants,powerandlifesupportfluids/gases)thatareusedduringthecourseoftheflight.Consumablesarebudgetedandmanagedtosupportallmissionneeds.
ConsumablesProductDevelopment-Theefforttoproduceplannedusageprofilesforallconsumablesthatcanconstrainamissionbynatureoftheirlimitedquantity(suchaspropellants,metabolicoxygen,andpowergeneration).Usedforpreflightplanningandreal-timeflightoperations.
ContingencyEVACapability-AnEVAcapabilityprovidedtodealwithcriticalfailuresorcircumstances,whicharenotadequatelyprotectedbyredundancyorothermeans.
ControlBoard-Theboard,panelorforumcharteredtohaveauthorityoveraparticularsubjectoritem(ex.FlightRulesControlBoard,CrewProceduresControlBoard,etc)
CrewActivitySchedulingConstraints-Constraints,restrictionsorrequirementsontheschedulingoftheflightcrew.Includessuchinformationsuchasrequiredamountsofsleep,amountcrewsleepcanbeshifted,amountoftimeforcrewmealsandexercise,etc.
CrewExplorationVehicle(CEV)-TheCEVprovidescrewhabitationandEarthre-entrycapabilityforallExplorationSpirals.InSpirals2and3,theCEVhasbeenfunctionallydefinedasthevehicleinwhichtheexplorationcrewwillbetransportedtothelunarvicinityandsubsequentlyreturnedtotheEarthsurface.TheCEVwillalsohavethecapabilitytoperformautomatedand/orautonomousoperations(loiter),fromLSAMseparationfromtheCEVfordescenttothelunarsurface,untiltheendofthelunarsurfacemission.
CrewExplorationVehicleLaunchSegment(CEVLS)-TheCEVLSconsistsofaCrewExplorationVehicle(CEV),aCrewLaunchVehicle(CLV),andallthededicatedgroundsupportinfrastructurenecessarytolaunchtheCEVtoEarthorbit.
CrewLaunchVehicle(CLV)-TheCLVisanelementoftheCTS.TheCLVwillbehuman-rated,andwilldelivertheCEVintoamission-specificEarthAscentTargetOrbit.
CrewMember-Humanonboardthespacecraftorspacesystemduringamission.
CrewOperations-Theactivitiesperformedbytheflightcrewwhileinthevehicleorduringamission.AsubsetoftheIntegratedFlightOperationsExecutionthatbeginswithcrewingressintotheCEVpriortolaunchandconcludeswiththecrewegressfromtheCEVpostlanding
CrewTransportationSystem(CTS)-TheCTSencompassestheflightelementsneededtodeliverahumancrewfromEarthtoamissiondestination,andreturnthecrewsafelytoEarth.InSpiral1,theCTSincludestheCEVandCLV.ForSpirals2and3,theCTSincludestheCEV,CLV,plusotherelementstobedefinedatalaterdatesuchasEDSandtheLSAM.TheCTSmustinteractwiththeGroundSupportSystem(GSS)duringallSpirals;currentarchitecturesrequiredeliveryoftheEDSandLSAMthroughuseoftheCDStorendezvousorbits.
CriticalHazard-Aconditionthatmaycauseasevereinjuryoroccupationalillness,lossofmission,ormajorpropertydamagetofacilities,systems,orflighthardware.
DemoFlight-The2008demonstrationflightperformedaspartoftheflighttestprogram.
DepotOperations-Theoperationsperformedofflinetoreceiveandacceptnewflighthardwarecomponents,recertifypreviouslyflownhardwarecomponentsforreuse,andtoperformmaintenanceandrepairswithintheLineReplaceableUnits(LRU's).
DestinationSurfacetoDestinationVicinityPhase-Startswiththeinitiationoftheascent(T0)fromthedestinationsurface.Representativemissionactivitiesinclude:
ascent,abort,andorbitinsertionorlibrationcapture.Phaseendsaftersuccessfuldestinationvicinityinsertion/capture.
DestinationVicinityOperationsPhaseA-Startsatthesuccessfulinsertion/captureatthedestinationvicinity.Representativemissionactivitiesinclude:
loiterandphasing,vehicleandsystemchecko