Flight research experiments have demonstrated that adaptive flight controls can be an effective technology for improving aircraft safety in the event of failures or damage. However, the nonlinear, timevarying nature of adaptive algorithms continues to challenge traditional methods for the verification and validation testing of safety-critical flight control systems. Increasingly complex adaptive control theories and designs are emerging, but only make testing challenges more difficult. A potential first step toward the acceptance of adaptive flight controllers by aircraft manufacturers, operators, and certification authorities is a very simple design that operates as an augmentation to a non-adaptive baseline controller. Three such controllers were developed as part of a National Aeronautics and Space Administration flight research experiment to determine the appropriate level of complexity required to restore acceptable handling qualities to an aircraft that has suffered failures or damage. The controllers consist of the same basic design, but incorporate incrementally-increasing levels of complexity. Derivations of the controllers and their adaptive parameter update laws are presented along with details of the controllers implementations.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Design of Low Complexity Model Reference Adaptive Controllers


    Contributors:
    C. Hanson (author) / J. Schaefer (author) / M. Johnson (author) / N. Nguyen (author)

    Publication date :

    2012


    Size :

    25 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Design of Low Complexity Model Reference Adaptive Controllers

    Hanson, Curt / Schaefer, Jacob / Johnson, Marcus et al. | NTRS | 2012




    Handling Qualities of Model Reference Adaptive Controllers with Varying Complexity for Pitch-Roll Coupled Failures

    Schaefer, J. / Hanson, C. / Johnson, M. et al. | British Library Conference Proceedings | 2011