25th Congress of International Council of the Aeronautical Sciences, 3 - 8 September 2006, Hamburg, Germany
Paper ICAS2006-3.10S

NON-LINEAR PHENOMENA ANALYSIS AND CHAOS PREDICTION OF STALL-INDUCED AEROELASTIC OSCILLATIONS VIA LYAPUNOV EXPONENTS

F. D. Marques, A. R. Simoni, V. A. Oliveira
Univ. of Sao Paulo, Brazil

Keywords: space state reconstruction, aeroelasticity, nonlinear systems, chaos

This paper characterizes the non-linear behaviour of stall-induced oscillations of an aeroelastic wing using the state space reconstruction approach. The method of delays is used to identify an embedded attractor in the state space from experimentally acquired aeroelastic responses. The Lyapunov exponents are calculated in order to identify chaotic behaviour.

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