The influence of the maximum lift-to-drag ratio on the turning performance of an Orbital Transfer Vehicle is analyzed. Chapman's variables are used to formulate the equations of motion which are valid for both atmospheric flight and flight in a vacuum in a Newtonian gravitational field. Of the six adjoint variables involved in the variational formulation, four exact integrals and two approximate relations are obtained. This leads to an approximate but explicit control law for the lift and bank control. The control law is tested numerically for a whole range of entry speeds, from parabolic entry to near-circular entry with several values of maximum lift-to-drag ratio. The extensive numerical results, which are very accurate as compared to the exact optimal values, show that the maximum plane change for any speed ratio V(entry)/V(final) is simply proportional to the maximum lift-to-drag ratio, and depends solely on this parameter.


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    Titel :

    Effect of maximum lift to drag ratio on optimal aeroassisted plane change


    Beteiligte:
    Johannesen, J. R. (Autor:in) / Vinh, N. X. (Autor:in) / Mease, K. D. (Autor:in)

    Kongress:

    Atmospheric Flight Mechanics Conference ; 1985 ; Snowmass, CO


    Erscheinungsdatum :

    01.01.1985


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Effect of maximum lift to drag ratio on optimal aeroassisted plane change

    JOHANNESEN, J. / VINH, N. / MEASE, K. | AIAA | 1985


    Optimal multiple-pass aeroassisted plane change

    Vinh, Nguyen X. / Ma, Der-Ming | NTRS | 1990


    Optimal aeroassisted maneuvers for orbital plane change

    De Divitiis, N. / Di Giacinto, M. | British Library Conference Proceedings | 1993


    Optimal entry angle of aeroassisted orbital plane change

    MA, DER-MING / TSENG, CHING-YEH | AIAA | 1993