Model-Free Control Design for Multi-Input Multi-Output Aeroelastic System Subject to External Disturbance

    Authors

    Z. Wang; A. Behal;P. Marzocca

    Comments

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    Abbreviated Journal Title

    J. Guid. Control Dyn.

    Keywords

    OUTPUT-FEEDBACK CONTROL; NONLINEAR WING SECTION; TRAILING-EDGE SURFACES; ADAPTIVE-CONTROL; ACTIVE CONTROL; LEADING-EDGE; FLUTTER; STABILIZATION; SUPPRESSION; AIRFOIL; Engineering, Aerospace; Instruments & Instrumentation

    Abstract

    In this paper, a class of aeroelastic systems with an unmodeled nonlinearity and external disturbance is considered. By using leading- and trailing-edge control surface actuations, a full-state feedforward/feedback controller is designed to suppress the aeroelastic vibrations of a nonlinear wing section subject to external disturbance. The full-state feedback control yields a uniformly ultimately bounded result for two-axis vibration suppression. With the restriction that only pitching and plunging displacements are measurable while their rates are not, a high-gain observer is used to modify the full-state feedback control design to an output feedback design. Simulation results demonstrate the efficacy of the multi-input multi-output control toward suppressing aeroelastic vibration and limit cycle oscillations occurring in pre and postflutter velocity regimes when the system is subjected to a variety of external disturbance signals. Comparisons are drawn with a previously designed adaptive multi-input multi-output controller.

    Journal Title

    Journal of Guidance Control and Dynamics

    Volume

    34

    Issue/Number

    2

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    446

    Last Page

    458

    WOS Identifier

    WOS:000288409000011

    ISSN

    0731-5090

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