Z. Wang/A. Behal/P. Marzocca
International Journal of Aeronautical and Space Sicences, vol. 12, no. 2, pp.179-189, 2011

Abstract : In this paper, robust adaptive control design problem is addressed for a class of aeroelastic systems with parametric uncertainty. By using leading- and trailing-edge control surface actuations, a full-state robust adaptive controller is initially designed to suppress the aeroelastic vibrations of a nonlinear wing section. The Full State Feedback (FSFB) control yields a Global Uniformly Ultimately Bounded (GUUB) result for two-axis vibration suppression. With the restriction that only pitching and plunging displacements are measurable while their rates are not, a High Gain Observer (HGO) is used to modify the FSFB control design to an Output Feedback (OFB) design while the stability analysis for the OFB control law is presented. Simulation results demonstrate the efficacy of the Multi-Input Multi-Output (MIMO) control toward suppressing aeroelastic vibrations and Limit Cycle Oscillations (LCOs) occurring in pre- and post-flutter velocity regimes.

Keyword : Aeroelastic systems, Multi-input multi-output control, Robust adaptive control, Output feedback control