A quantitative measure of linear system controllability quality was developed, implemented in a software program, and demonstrated through a preliminary evaluation of an experimental aircraft flight control system. A linear state space representation of aircraft perturbation motion was used as the differential constraint equation for a quadratic cost functional which minimizes the control energy required to reach a specified final state. The singular value decomposition of the controllability Grammian, which appears in the solution to this optimal control problem, yields a unique time-varying, orthogonal set of basis vectors which are ranked by the control energy required to move the linear system along each vector. The experimental flight control system consists of variable incidence wingtips acting as elevons and rudders, used on a supersonic-cruise light-weight fighter. The evaluation included both comparison of basis vector sets between baseline and modified aircraft and direct comparison of the control magnitudes required to reach sample final states. Results show the experimental controls are unsuitable due to: (1) poor longitudinal and lateral control power, (2) no yaw/rudder control available due to symmetry restrictions in the linear aerodynamics software.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Calculating Aircraft Controllability Quality


    Beteiligte:
    J. M. Yarger (Autor:in)

    Erscheinungsdatum :

    1979


    Format / Umfang :

    153 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Meta Aircraft Controllability

    Troub, Brandon / Montalvo, Carlos J. | AIAA | 2016


    Tandem-Scheme Aircraft Controllability

    Kryvokhatko, Illia S. | IEEE | 2019


    Stability and Controllability of Supersonic Aircraft

    V. Lutskii / E. Galashev | NTIS | 1970


    Stability and Controllability of Supersonic Aircraft

    V. Lutskii / E. Galashev | NTIS | 1970


    Stability and Controllability of Supersonic Aircraft

    V. Lutskii / E. Galashev | NTIS | 1970