In the presence of large uncertainties, a control system needs to be able to adapt rapidly to regain performance. Fast adaptation is referred to as the implementation of adaptive control with a large adaptive gain to reduce the tracking error rapidly; however, a large adaptive gain can lead to high-frequency oscillations which can adversely affect the robustness of an adaptive control law. A new adaptive control modification is presented that can achieve robust adaptation with a large adaptive gain without incurring high-frequency oscillations as with the standard model-reference adaptive control. The modification is based on the minimization of the Y2 norm of the tracking error, which is formulated as an optimal control problem. The optimality condition is used to derive the modification using the gradient method. The optimal control modification results in a stable adaptation and allows a large adaptive gain to be used for better tracking while providing sufficient robustness. A damping term (v) is added in the modification to increase damping as needed. Simulations were conducted on a damaged F-18 aircraft (McDonnell Douglas, now The Boeing Company, Chicago, Illinois) with both the standard baseline dynamic inversion controller and the adaptive optimal control modification technique. The results demonstrate the effectiveness of the proposed modification in tracking a reference model.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Adaptive Flight Control Design with Optimal Control Modification on an F-18 Aircraft Model


    Beteiligte:

    Kongress:

    AIAA Infotech@Aerospace 2010 Conference ; 2010 ; Atlanta, GA, United States


    Erscheinungsdatum :

    20.04.2010


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Adaptive Flight Control Design with Optimal Control Modification on an F-18 Aircraft Model

    Burken, J. / Nguyen, N. / Griffin, B. et al. | British Library Conference Proceedings | 2010


    Adaptive Model Inversion Flight Control far Tiltrotor Aircraft

    Calise, J. / Rysdyk, R. T. / American Helicopter Society | British Library Conference Proceedings | 1998


    Adaptive model inversion flight control for tiltrotor aircraft

    Rysdyk, R.T. / Calise, A.J. | Tema Archiv | 1998


    Adaptive model inversion flight control for tiltrotor aircraft

    Calise, Anthony / Rysdyk, Rolf | AIAA | 1997