Two methods for control system reconfiguration have been investigated. The first method is a robust servomechanism control approach (optimal tracking problem) that is a generalization of the classical proportional-plus-integral control to multiple input-multiple output systems. The second method is a control-allocation approach based on a quadratic programming formulation. A globally convergent fixed-point iteration algorithm has been developed to make onboard implementation of this method feasible. These methods have been applied to reconfigurable entry flight control design for the X-33 vehicle. Examples presented demonstrate simultaneous tracking of angle-of-attack and roll angle commands during failures of the fight body flap actuator. Although simulations demonstrate success of the first method in most cases, the control-allocation method appears to provide uniformly better performance in all cases.


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    Title :

    Two Reconfigurable Flight-Control Design Methods: Robust Servomechanism and Control Allocation


    Contributors:
    Burken, John J. (author) / Lu, Ping (author) / Wu, Zheng-Lu (author) / Bahm, Cathy (author)

    Conference:

    AIAA Guidance Navigation and Control Conference ; 1999 ; Portland, OR, United States



    Publication date :

    2001-05-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English