Fuzzy sliding mode guidance law and predictive controller design for hypersonic vehicle during climbing phase

In this paper, a novel control scheme for a hypersonic vehicle during climbing phase is proposed. First, the six degree-of-freedom mathematical model of the hypersonic vehicle is presented. Second, the fuzzy sliding mode guidance law for climbing phase is designed combining the features of sliding model control and fuzzy control. To simplify the design of attitude controller, the rotational equations are divided into the fast loop and the slow loop, which improves the dynamic response owing to the lower relative degree of either subsystem. Based on a nonlinear generalized predictive control approach, the predictive controller is then designed to suit the intricate nonlinearity and uncertainty. Finally, simulation results illustrate the effectiveness of the proposed control scheme.