Reduced-order modeling and flutter suppression control of an experimental wing

Abstract

This paper presents a numerical and experimental study of the reduced-order modeling (ROM) and flutter suppression control of a wind-tunnel wing model. The modeling work is computation based and performed in modal coordinates of the wing structure. A nonlinear ROM of aerodynamic and structural responses is obtained via computational aero-elasticity simulation, finite-element analysis and system identification. Then, casting the linearized model in linear fractional transform, a fixed-order robust controller is obtained that achieves flutter suppression over uncertain air speed.