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1、NASATechnicalMemorandum85890USAAVSCOMTechnicalMemorandum84-A-2AMathematicalModeloftheUH-60HelicopterKathrynB.Hilbert,AeromechanicsLaboratory,U.S.ArmyResearchandTechnologyLaboratories-AVSCOM•AmesResearchCenter,MoffettField,CaliforniaNationalAeronauticsandUnitedStatesArmySpaceAdmini
2、strationAviationSystems_t"__)_AmesResearchCenterCommand_l_._,yJ._________________St.Louis,Missouri63120_MoffettField,California94035SYMBOLStabladelift-curveslope,perradabladeconinganglemeasuredfromhubplaneinthehub-windaxessystem,radoallongitudinalfirst-harmonicflappingcoefficientm
3、easuredfromthehubplaneinthewind-hubaxessystem,radlateralacceleration,m/sec2(ft/sec2)aybllateralfirst-harmonicflappingcoefficientmeasuredfromhubplaneinthewind-hubaxessystem,radrotorthrustcoefficient,T/p(_R2)(_R)2CTDDragforce,N(ib)Hrotorforcenormaltoshaft,positivedownwind,N(Ib)incid
4、enceofhorizontalstabilator,positiveforleadingedgeup,rad_-HSKtailrotorcantangle,radKpitch-flapcouplingratio,_tan631fuselagerollingmoment,N-m(ft-lb)Lfuselagelift,N(ib)rollingmoment,pitchingmoment,andyawingmoment,respectively,N-in(ft-lb)Proll,pitch,andyawratesinthebody-c.g,axessystem
5、,rad/seciqdynamicpressure,_QV2,N/m2(ib/ft2)Qtorque,N-m(ft-lb)Rrotorradius,m(ft)STAlongitudinallocationinthefuselageaxessystem,m(ft)Tthrust,N(lb)iiilongitudinal,lateral,andverticalvelocitiesinthebody-c.g,systemofaxes,m/sec(ft/sec)tailrotorinducedvelocityatrotordisk,m/sec(ft/sec)ViT
6、RWLverticallocationinthefuselageaxessystem,m(ft)Yx}longitudinal,lateral,andverticalforcesinthebody,c.g.axessystem,N(ib)ZStabilizingsurfaceangleofattack,radSwrotorsideslipangle,radYbladeLocknumber,pacR4/IB6equivalentrotorbladeprofiledragcoefficient6lateralcyclicstickmovement,positi
7、vetoright,cm(in.)a6collectivecontrolinput,positiveup,cm(in.)C6longitudinalcYclicstickmovement,positiveaft,cm(in.)e6pedalmovement,positiveright,cm(in.)PAincrementin0Eulerpitchangle,radbladerootcollectivepitch,radO0totalbladetwist(rootminustipincidence),radtAWHCTinflowratio,-2/u_+vH
8、rotoradvanceratio,fiRPairdensity,
