Due to a need for improved reliability and performance in aerospace systems, there is increased interest in the use of adaptive control or other nonlinear, time-varying control designs in aerospace vehicles. While such techniques are built on Lyapunov stability theory, they lack an accompanying set of metrics for the assessment of stability margins such as the classical gain and phase margins used in linear time-invariant systems. Such metrics must both be physically meaningful and permit the user to draw conclusions in a straightforward fashion. We present in this paper a roadmap to the development of metrics appropriate to nonlinear, time-varying systems. We also present two case studies in which frozen-time gain and phase margins incorrectly predict stability or instability. We then present a multi-resolution analysis approach that permits on-line real-time stability assessment of nonlinear systems.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Stability Metrics for Simulation and Flight-Software Assessment and Monitoring of Adaptive Control Assist Compensators


    Beteiligte:
    Hodel, A. S. (Autor:in) / Whorton, Mark (Autor:in) / Zhu, J. Jim (Autor:in)

    Kongress:

    2008 AIAA Guidance, Navigation, and Control Conference and Exhibit ; 2008 ; Honolulu, HI, United States


    Erscheinungsdatum :

    2008-07-18


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Stability and Performance Metrics for Adaptive Flight Control

    Stepanyan, Vahram / Krishnakumar, Kalmanje / Nguyen, Nhan et al. | NTRS | 2009


    Stability and Performance Metrics for Adaptive Flight Control

    Stepanyan, Vahram / Krishnakumar, Kalmanje / Nguyen, Nhan et al. | AIAA | 2009


    Novel MSE Adaptive Control of Optical PMD Compensators

    Forestieri, E. / Colavolpe, G. / Prati, G. | British Library Online Contents | 2002


    Flight Validation of Metrics Driven L1 Adaptive Control

    Dobrokhodov, Vladimir / Kitsios, Iannis / Kaminer, Isaac et al. | AIAA | 2008