This report was developed under SBIR contract for topic AF99-28O describes an analytical development of buffet and gust load alleviation methodology. An active control surface modal device is employed to generate out- of-phase aerodynamic damping that reduces dynamic loads arising from buffet and gust encounter. Lightweight smart actuators having high response rate are used to activate the control surface modal device. This concept can also be applied to flutter suppression of any lifting surfaces. This active control algorithm can be implemented and operated independently of the primary flight control systems to avoid interference. The test cases include buffeting of F-18 twin vertical tails in high alpha flight configuration and gust environment. Analytical predictions show 80 percent reduction in tail root stress that could result in eight fold increase in fatigue life of an aircraft. Consequently, if this dynamic load alleviation methodology is implemented into existing and new military aircraft several millions of dollars can be saved per aircraft in its service life.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Aircraft Dynamic Load Alleviation Using a Smart Actuation System

    K. Appa / J. Ausman / N. S. Khot et al. | NTIS | 2000


    Buffet load alleviation using a smart actuation system

    Appa, K. / Ausman, J. / Khot, N. et al. | AIAA | 2001


    AIAA-2001-1665 Buffet Load Alleviation Using a Smart Actuation System

    Appa, K. / Ausman, J. / Khot, N. et al. | British Library Conference Proceedings | 2001


    AIRCRAFT WING LOAD ALLEVIATION DEVICE AND AIRCRAFT WING LOAD ALLEVIATION METHOD

    HIRABAYASHI DAISUKE / AKIBA KOUSABUROU | European Patent Office | 2019

    Free access

    Aircraft wing load alleviation device and aircraft wing load alleviation method

    HIRABAYASHI DAISUKE / AKIBA KOUSABUROU | European Patent Office | 2020

    Free access