pec航空英语证书考试-飞行器术语

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1、PEC航空英语证书考试-飞行器术语Abort-Earlymissionterminationduetofailure(s)thatprecludemissioncontinuation.ReturntoEarthofthecrewisaccomplishedinsidethespacecraftdesignedforEarthreturnandlanding(seeAborttoEarth,AborttoOrbit).AborttoEarth-Earlymissiontermination,withd

2、irectreturntotheEarth'ssurfaceastheimmediateobjective.AborttoOrbit-Anearlymissionterminationthathasanimmediateobjectiveofplacingtheflightsystem(CEV)inEarthorbit,priortoreturntotheEarth'ssurface.AcceptanceTests-Testsconductedtoverifythathardwaredelivered

3、tohigher-levelassemblypriortodeliverytotheflighttestandpriortodeliverytotheoperationalinventoryorforoperationalsparesconformstoprogramrequirements.Acceptancetestingalsoincludesfinal"sell-off"ofthefullyassembledCEV.Annunciate-Toprovideavisual,tactileorau

4、dibleindication.Ascent-ThetimefromliftofffromtheEarth'ssurface,tospacecraftinsertionintoEarthorbit.AscentAbort-Earlymissionterminationduetofailure(s)thatprecludemissioncontinuation.ReturntoEarthofthecrewisaccomplishedinsidethespacecraftdesignedforEarthr

5、eturnandlanding.AttitudeandPointingConstraints-Constraints,restrictionsorrequirementsonthevehiclesorientationinspace.Thesemayincludethingssuchasrequirementstoorientasensorataspecifictarget(suchasaspecificstar),oraconstraintlimitingtheamountoftimeavehicl

6、eaxiscanbeorientedtowardaparticulartarget(suchasthesun,ordeepspace).Theyalsoincludeconstraintsorrestrictionsonmaneuverratesandattitudedeadbands.Automatedcontrol-Automatic,asopposedtohumanoperationorcontrolofaprocess,equipmentorasystem;orthetechniquesand

7、equipmentusedtoachievethis.Automationisthecontrolorexecutionofactionswithnohumaninteraction.Automatedcontroldoesnotexcludethecapabilityformanualintervention/commanding,butmanualintervention/commandingisexplicitlynotrequiredtoaccomplishthefunction.Autono

8、mousoperations-Definedasaflightvehicleoperatingindependentofexternalcommandsorcontrol(i.e.,commandsfrommissioncontrolonEarth).Autonomousoperationscanbefullyautomatedorrequiresomedegreeofmanualcommanding/interventionbytheonboardcr