Application of L₁ adaptive controller to wing rock

Wing rock is a classical benchmark example, which is widely used in aerospace industry to compare the performance of different control architectures. The main challenge of this problem resides in the nonlinearity of the wing rock phenomenon, which leads to a stable limit cycle. In this paper we present L₁ adaptive controller for wing rock. We show that the L₁ adaptive controller, without any retuning, ensures uniform transient behavior and satisfactory tracking in the entire operating domain, involving different angle of attack flight conditions in the presence of different types of uncertainties and disturbances.