This paper presents an implementation of a recently developed control allocation algorithm CAPIO (a Control Allocation technique to recover from Pilot Induced Oscillations) for composite adaptive control of an inertially cross coupled unstable aircraft. When actuators are rate-saturated due to either an aggressive pilot command, high gain of the flight control system or some anomaly in the system, the effective delay in the control loop may increase due to the phase shifting between the desired and the achieved system states. This effective time delay may deteriorate the performance or even destabilize the system in some cases, depending on the severity of rate saturation. CAPIO reduces the effective time delay by minimizing the phase shift between the commanded and the actual attitude accelerations. We present simulation results for an unstable aircraft with cross-coupling controlled with a composite adaptive controller in the presence of rate saturation. The simulations demonstrate the potential of CAPIO serving as an effective rate saturation compensator in adverse conditions.


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    Title :

    Implementation of CAPIO for Composite Adaptive Control of Cross-Coupled Unstable Aircraft


    Contributors:

    Conference:

    Infotech at Aerospace 2011 ; 2011 ; St. Louis, MO, United States


    Publication date :

    2011-03-29


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





    Implementation of CAPIO for Composite Adaptive Control of Cross-Coupled Unstable Aircraft

    Yildiz, Y. / Kolmanovsky, I. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2011



    Stability Properties and Cross Coupling Performance of the Control Allocation Scheme CAPIO

    Yildiz, Y. / Kolmanovsky, I. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2010