Adaptive backstepping controller design for reentry attitude of near space hypersonic vehicle

Abstract

Based on backstepping design, a strongly robust adaptive control system is designed for reentry attitude of near space hypersonic vehicle, which is suffered by parameter uncertainties and external disturbances. In each step of backstepping design, the unknown upper bound of uncertainty is estimated by adaptive method to reduce conservation. The derivative of the virtual controller is calculated by a precise differentiator based on higher-order sliding modes. Using non-quadratic Lyapunov function, the global asymptotic stability of the closed-loop system is proved. Simulation results show that the proposed control system can overcome the impact of lage-scale perturbations of aerodynamic parameters and external disturbances, which has better dynamic qualities, tracking capabilities compared to the traditional backstepping controller. © 2013 Springer-Verlag Berlin Heidelberg.