Adaptive back-stepping tracking control of the hypersonic vehicle with input saturation

This paper studies the tracking problem of hypersonic vehicles subjected to external disturbances, modeling uncertainty, and input saturation. The adaptive anti-saturation control scheme is designed based on the first-order command filter, dynamic surface control and auxiliary system. The proposed control strategy not only uses adaptive algorithms to estimate the external disturbance, but also introduces an auxiliary system to solve the problem of input saturation. The stability of the closed-loop system with respect to the proposed control scheme is proved by using Lyapunov theory, and the results of numerical simulations are presented to demonstrate the effectiveness of the proposed control strategy.