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Geometric Coordinates and Transformations
Incorporation of Unsteady Aerodynamics in Equations
Calculation of Hub Forces and Moments
9 other sections not shown
advance ratio aerodynamic loads aeroelastic aeroelastic model articulated blade articulated rotor baseline values blade root offset calculated cautious global control collective pitch convergence coordinate system cosine Deformed deterministic versus cautious eigenvalues elastic axis flap and lag flap trim forces and moments forward flight Fourier full trim fuselage Helicopter Rotor HHC angles HHC input angles Higher Harmonic Control hingeless blade hingeless rotor history of HHC history of vertical hub loads hub moments i i i i i i i i i Iteration history ITERATION NUMBER Figure Kalman filter lateral shear linear longitudinal hub shears longitudinal shear minimized mode shapes nondimensional nonlinear OH6A rotor optimal peak-to-peak peak-to-peak hub quasisteady aerodynamics quasisteady and unsteady reduce rotating rotor hub shears for deterministic shows the iteration simulation soft-in-plane blade stiff-in-plane blade transfer matrix trim procedure unsteady aerodynamics Variation of 4/rev vector velocity versus cautious global Vertica vertical shear vibration levels vibration reduction