The control (via the angle of attack) of the vertical flight of an aircraft taking off at maximum power in a horizontal wind shear with downdraft is investigated analytically. Optimal trajectories to recover the initial path inclination or to recover quasi-steady flight (the relative values of the velocity, path inclination, and angle of attack) are derived using a Chebyshev approach and shown to be nearly identical in the shear but divergent after the shear. These results are then applied to construct a trajectory-guidance control comprising a variable-gamma guidance scheme for the shear trajectory, a constant-gamma guidance scheme for the immediate postshear trajectory, and a constant-rate-of-climb guidance scheme for the aftershear trajectory. Numerical results demonstrating the near-optimal performance of the control are presented in tables and graphs.


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    Titel :

    Quasi-steady flight to quasi-steady flight transition in a windshear - Trajectory guidance


    Beteiligte:
    Miele, A. (Autor:in) / Wang, T. (Autor:in) / Melvin, W. W. (Autor:in)

    Erscheinungsdatum :

    1987-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Gamma guidance schemes for flight in a windshear

    MIELE, A. / WANG, T. / MELVIN, W. W. et al. | AIAA | 1988


    Gamma guidance schemes for flight in a windshear

    Miele, A. / Wang, T. / Melvin, W. W. et al. | NTRS | 1988


    Flight Instruments for Improved Windshear Protection and Guidance

    Kendall, E. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1997