23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-4.4.4

SUPERSONIC FLUTTER AND POST-FLUTTER CONTROL OF AN AIRCRAFT WING SECTION

P. Marzocca (1), L. Librescu (1), W. A. Silva (2)
(1) Virginia Polytechnic Institute and State University, USA; (2) NASA Langley Research Center, Hampton, USA

Keywords: aeroelasticity, lyapunov first quantity, hopf-bifurcation

A number of issues related to the supersonic flutter and post-flutter of a wing section, as well to their control are addressed. The objectives of this study are: 1) to analyze the implications of nonlinear supersonic piston theory aerodynamics and structural nonlinearities on the character of the flutter instability boundary of wing sections, and 2) to implement a control capability enabling one to control both the flutter boundary and its character. The study of the bifurcation behavior of the aeroelastic system in the vicinity of the flutter boundary is carried out via Lyapunov's first quantity.

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