Adaptive prescribed performance attitude control for RLV with mismatched disturbance

Abstract A novel adaptive multivariable control algorithm with guaranteed transient and steady state performance is developed for reusable launch vehicle (RLV) subject to bounded but unknown matched and mismatched disturbances. A back-stepping-like idea combining with an adaptive control scheme is utilized to deal with both the matched and mismatched disturbances, and Lyapunov-based technology is used to ensure the stability of the closed-loop system. With the developed controller, the attitude tracking errors are confined into a prescribed region independent of the upper bound of disturbances, and converge to a small vicinity of zero in predefined time. Finally, simulation results are provided to illustrate the efficiency of the proposed algorithm.