A moving mass trim controller increase the accuracy of axisymmetric, ballistic vehicles. The MMTC is different than other moving mass schemes because it generates an angle-of-attack (AOA) directly from the mass motion. The nonlinear equations of motion for a ballistic vehicle with one moving point mass are derived and provide the basis for a detailed simulation model. The full nonlinear equations are linearized to produce a set of linear, time-varying autopilot equations. These autopilot equations are analyzed and used to develop theoretical design tools for the creation of MMTCs for both fast and slow spinning vehicles. A fast spinning MMTC is designed for a generic artillery rocket that uses principal axis misalignment to generate trim AOA. A slow spinning is designed for a generic reentry vehicle that generates a trim AOA with a center of mass offset and aerodynamic drag. The performance of both MMTCs are evaluated with the detailed simulation.


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    Titel :

    Moving mass trim control for aerospace vehicles


    Beteiligte:
    R. D. Robinett (Autor:in) / B. A. Rainwater (Autor:in) / S. A. Kerr (Autor:in)

    Erscheinungsdatum :

    1994


    Format / Umfang :

    19 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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