The terminal guidance problem for a fixed-trim re-entry body is formulated with the objective of synthesizing a closed-loop steering law. A transformation of variables and subsequent linearization of the motion, with the sight-line to the target as a reference, reduces the order of the state system for the guidance problem. The reduced order system, although nonlinear and time-varying, is simple enough to lend itself to synthesis of a class of guidance laws. A generalization of the feedforward device of classical control theory is successfully employed for compensation of roll autopilot lags. The proposed steering law exhibits superior miss-distance performance in a computational comparison with existing fixed-trim guidance laws.


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    Title :

    Fixed-trim re-entry guidance analysis


    Contributors:
    Gracey, C. (author) / Cliff, E. M. (author) / Lutze, F. H. (author) / Kelley, H. J. (author)

    Conference:

    Guidance and Control Conference ; 1981 ; Albuquerque, NM


    Publication date :

    1981-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English





    Fixed-trim re-entry guidance analysis

    Gracey, C. / Cliff, E. M. / Lutze, F. H. et al. | NTRS | 1982


    Fixed-trim re-entry guidance analysis

    GRACEY, C. / CLIFF, E. M. / LUTZE, F. H. et al. | AIAA | 1982



    Moving-Mass Roll Control System for Fixed-Trim Re-Entry Vehicle

    Thomas Petsopoulos / Frank J. Regan / Jewel Barlow | AIAA | 1996