Forecasting Subcritical and Supercritical Flutter using Gust Responses

摘要

This work presents a unique method to forecast flutter (Hopf) bifurcations based on observations of the system only in the pre-bifurcation regime. New techniques are introduced in to enhance prediction accuracy for both low-frequency oscillations and large-dimensional dynamical systems. The method is applied to an aeroelastic system using its response to gust loads. Numerical results demonstrate that the method can predict the post-bifurcation regime accurately for both supercritical and subcritical flutter.