Fast Finite-time Sliding Mode Controller Design for Generic Hypersonic Vehicle Based on Extended State Observer

This paper addresses the problem of tracking control of the generic hypersonic vehicle. In order to facilitate the design of the controller, the input-output linearization of the longitudinal model is established, so as to construct an auxiliary second-order model based on the tracking error of altitude and velocity. Then, based on the finite-time control method, a fast finite-time sliding mode controller is designed with a development sliding manifold, and the stability of the designed controller is proved by the Lyapunov stability theory. Furthermore, to deal with the external disturbance, a finite-time extended state observer (ESO) is proposed. Finally, the numerical simulation is carried out. The simulations show that the proposed control scheme achieves high-precision tracking performance in the presence of disturbances.