22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-4.10.R2

MODEL MODIFICATION OF TRANSONIC AERODYNAMIC FORCE ON A HIGH-ASPECT RATIO AEROELASTIC WING AND ITS ACTIVE FLUTTER

A. Fujimori (1), H. Matsushita (2), K. Saitoh (2)
(1) Department of Mechanical Engineering, Shizuoka University, Japan; (2) National Aerospace Laboratory, Japan

Keywords: active flutter suppression, model uncertainty, unsteady aerodynamic force, wind tunnel experiment

This paper presents a model modification of a high-aspect-ratio aeroelastic wing and its active flutter suppression (AFS). One of errors in the linear model of the wing in the transonic region exists in the unsteady aerodynamic force, which is represented by a rational function. To reduce the error, the linear model of is modified in terms of the unsteady aerodynamic force so that the flutter dynamic pressure of the linear model coincides with the one obtained by wind tunnel experiment. Using the modified linear model, AFS controllers are then designed by H8 control synthesis and controller reduction. The control performance is evaluated by numerical simulation and wind tunnel experiment.

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