Comparison of different feedback controllers on an airfoil benchmark

Abstract

The present paper proposes a comparison of three well-established controllers: a robust proportional-integral-derivative (PID) controller (), a model-free control () and an adaptive sliding-mode control based on the super-twisting algorithm (). The benchmark considered is an airfoil section equipped with trailing edge jets, load sensors and a perturbation system. The objective is to track the lift command under external wind perturbations. The outcome of this work is the comparison of performances for three control laws that are suitable when little knowledge is known from the physics. This study quantifies performance not only in terms of load control, but also in the needed implementation effort.