In the present work a typical section aeroelastic model of a vertical fin is used to evaluate two different active control strategies to attenuate buffeting response at high angle of attack, namely the classic aerodynamic surface control approach using the rudder, and a new `smart' structures strain actuation approach. The three-degree-of-freedom typical section model including plunge, airfoil and flap rotation is augmented to incorporate the unsteady airloads due to motion, and an internal `buffet mode' to simulate the buffering excitation observed in wind tunnel tests of the fin at a given range of reduced frequencies. The two control strategies are studied using the Linear Quadratic Gaussian method of the Optimum Control Theory. Numerical results are presented in terms of Bode plots of the structure aeroelastic response, and root-loci of the aeroelastic modes at a representative flight condition.

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Conference Proceedings of the 1997 38th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Part 4 (of 4)
Nitzsche, F, Zimcik, D.G. (D. G.), & Langille, K. (K.). (1997). Active control of vertical fin buffeting with aerodynamic control surface and strain actuation. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (pp. 1467–1477).