AbstractThis paper presents a backstepping procedure to design an adaptive controller for the air-breathing hypersonic flight vehicle (AHFV) subject to external disturbances and actuator saturations. In each step, a sliding mode exact disturbance observer (SMEDO) is exploited to exactly estimate the lumped disturbance in finite time. Specific dynamics are introduced to handle the possible actuator saturations. Based on SMEDO and introduced dynamics, an adaptive control law is designed, along with the consideration on “explosion of complexity” in backstepping design. The developed controller is equipped with fast disturbance rejection and great capability to accommodate the saturated actuators, which also lead to a wider application scope. A simulation study is provided to show the effectiveness and superiority of the proposed controller.

    HighlightsSMEDO is developed to improve the disturbance rejection property.“Explosion of complexity” is circumvented by sliding mode exact differentiator.Observation errors are suppressed by adaptive control laws.Effects of input saturations are efficiently handled.


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    Title :

    Sliding mode disturbance observer-enhanced adaptive control for the air-breathing hypersonic flight vehicle


    Contributors:
    An, Hao (author) / Wang, Changhong (author) / Fidan, Baris (author)

    Published in:

    Acta Astronautica ; 139 ; 111-121


    Publication date :

    2017-06-25


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English