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1、NASATechnicalMemorandum85890USAAVSCOMTechnicalMemorandum84-A-2AMathematicalModeloftheUH-60HelicopterKathrynB.Hilbert,AeromechanicsLaboratory,U.S.ArmyResearchandTechnologyLaboratories-AVSCOM•AmesResearchCenter,MoffettField,CaliforniaNationalAeronauticsandUnit
2、edStatesArmySpaceAdministrationAviationSystems_t"__)_AmesResearchCenterCommand_l_._,yJ._________________St.Louis,Missouri63120_MoffettField,California94035SYMBOLStabladelift-curveslope,perradabladeconinganglemeasuredfromhubplaneinthehub-windaxessystem,radoal
3、longitudinalfirst-harmonicflappingcoefficientmeasuredfromthehubplaneinthewind-hubaxessystem,radlateralacceleration,m/sec2(ft/sec2)aybllateralfirst-harmonicflappingcoefficientmeasuredfromhubplaneinthewind-hubaxessystem,radrotorthrustcoefficient,T/p(_R2)(_R)2C
4、TDDragforce,N(ib)Hrotorforcenormaltoshaft,positivedownwind,N(Ib)incidenceofhorizontalstabilator,positiveforleadingedgeup,rad_-HSKtailrotorcantangle,radKpitch-flapcouplingratio,_tan631fuselagerollingmoment,N-m(ft-lb)Lfuselagelift,N(ib)rollingmoment,pitchingmo
5、ment,andyawingmoment,respectively,N-in(ft-lb)Proll,pitch,andyawratesinthebody-c.g,axessystem,rad/seciqdynamicpressure,_QV2,N/m2(ib/ft2)Qtorque,N-m(ft-lb)Rrotorradius,m(ft)STAlongitudinallocationinthefuselageaxessystem,m(ft)Tthrust,N(lb)iiilongitudinal,latera
6、l,andverticalvelocitiesinthebody-c.g,systemofaxes,m/sec(ft/sec)tailrotorinducedvelocityatrotordisk,m/sec(ft/sec)ViTRWLverticallocationinthefuselageaxessystem,m(ft)Yx}longitudinal,lateral,andverticalforcesinthebody,c.g.axessystem,N(ib)ZStabilizingsurfaceangle
7、ofattack,radSwrotorsideslipangle,radYbladeLocknumber,pacR4/IB6equivalentrotorbladeprofiledragcoefficient6lateralcyclicstickmovement,positivetoright,cm(in.)a6collectivecontrolinput,positiveup,cm(in.)C6longitudinalcYclicstickmovement,positiveaft,cm(in.)e6pedal
8、movement,positiveright,cm(in.)PAincrementin0Eulerpitchangle,radbladerootcollectivepitch,radO0totalbladetwist(rootminustipincidence),radtAWHCTinflowratio,-2/u_+vHrotoradvanceratio,fiRPairdensity,
