A real-time, frequency-domain, equation-error parameter identification (PID) technique was used to estimate stability and control derivatives from flight data. This technique is being studied to support adaptive control system concepts currently being developed by NASA (National Aeronautics and Space Administration), academia, and industry. This report describes the basic real-time algorithm used for this study and implementation issues for onboard usage as part of an indirect-adaptive control system. A confidence measures system for automated evaluation of PID results is discussed. Results calculated using flight data from a modified F-15 aircraft are presented. Test maneuvers included pilot input doublets and automated inputs at several flight conditions. Estimated derivatives are compared to aerodynamic model predictions. Data indicate that the real-time PID used for this study performs well enough to be used for onboard parameter estimation. For suitable test inputs, the parameter estimates converged rapidly to sufficient levels of accuracy. The devised confidence measures used were moderately successful.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Real-Time Stability and Control Derivative Extraction From F-15 Flight Data


    Contributors:
    M. S. Smith (author) / T. R. Moes (author) / E. A. Morelli (author)

    Publication date :

    2003


    Size :

    36 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Real-Time Stability and Control Derivative Extraction from F-15 Flight Data

    Smith, Mark / Moes, Timothy / Morelli, Eugene | AIAA | 2003


    Real-Time Stability and Control Derivative Extraction From F-15 Flight Data

    Smith, Mark S. / Moes, Timothy R. / Morelli, Eugene A. | NTRS | 2003


    AIAA-2003-5701 Real-Time Stability and Control Derivative Extraction from F-15 Flight Data

    Smith, M. / Moes, T. / Morelli, E. et al. | British Library Conference Proceedings | 2003



    Extraction of stability and control derivatives from orbiter flight data

    Iliff, Kenneth W. / Shafer, Mary F. | NTRS | 1993