An Adaptive Control Scheme for Longitudinal Dynamics of A Twin Otter Aircraft

This paper proposes a feedback linearization based adaptive control scheme for longitudinal dynamics of a twin otter aircraft system established in [1]. For the aircraft system with two different output vectors, two relevant relative degree dependent formulations are developed to realize parametrizations of output dynamics. Then, the stability and output tracking performance is analyzed for the two cases based on the Lyapunov method and the gradient method, respectively. In particular, the singularity problems of the adaptive control gain matrices are analyzed for the two cases. The simulation results verify the validity of the proposed control method.