Stochastic robustness analysis of a 3DOF airfoil active flutter suppression system

Abstract

In order to increase the operability range of wings in terms of speed, the suppression of aeroelastic vibrations due to flutter phenomena using a trailing edge flap is analysed. The aeroelastic modelling of a three degrees of freedom airfoil in incompressible flow is presented and an augmented state space representation is used for the time domain analysis of the problem. A finite element model of a V stack piezoelectric actuator, used to move the trailing edge flap, is introduced. A heuristic method named Particle Decline Swarm Optimization for the tuning of the filtered PID controller parameters for different velocity values is used. A stochastic robustness analysis is carried out to verify the robustness to parameters uncertainties of the proposed flutter suppression system.