Practical application of real-time (or near real-time) Adaptive Performance Optimization (APO) is provided for a transport aircraft in steady climb, cruise, turn descent or other flight conditions based on measurements and calculations of incremental drag from a forced response maneuver of one or more redundant control effectors defined as those in excess of the minimum set of control effectors required to maintain the steady flight condition in progress. The method comprises the steps of applying excitation in a raised-cosine form over an interval of from 100 to 500 sec. at the rate of 1 to 10 sets/sec of excitation, and data for analysis is gathered in sets of measurements made during the excitation to calculate lift and drag coefficients C.sub.L and C.sub.D from two equations, one for each coefficient. A third equation is an expansion of C.sub.D as a function of parasitic drag, induced drag, Mach and altitude drag effects, and control effector drag, and assumes a quadratic variation of drag with positions .delta..sub.i of redundant control effectors i=1 to n. The third equation is then solved for .delta..sub.iopt the optimal position of redundant control effector i, which is then used to set the control effector i for optimum performance during the remainder of said steady flight or until monitored flight conditions change by some predetermined amount as determined automatically or a predetermined minimum flight time has elapsed.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    In-flight adaptive performance optimization (APO) control using redundant control effectors of an aircraft


    Contributors:

    Publication date :

    1999-06-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Control of Ducted Fan Aircraft Using Redundant Effectors

    Ozdemir, Gurbuz / Horn, Joseph | AIAA | 2009


    Control of Ducted Fan Aircraft Using Redundant Effectors

    Ozdemir, G. / Horn, J. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2009


    Adaptive control of high-performance aircraft with multiple control effectors

    Singh, Sahjendra / Steinberg, Marc / Page, Anthony | AIAA | 1999


    Adaptive Control of High-Performance Aircraft with Multiple Control Effectors

    Singh, S. / Steinberg, M. / Page, A. et al. | British Library Conference Proceedings | 1999


    Control Allocation Based Reconfigurable Flight Control for Aircraft with Multiple Control Effectors

    Zhong, Y. / Yang, L. / Shen, G. et al. | British Library Conference Proceedings | 2009