Integrated Guidance and Control System Design for Hypersonic Vehicle Based on Backstepping High-Order Sliding Mode Approach

A six-degree-of-freedom (6DOF) control scheme is proposed for the glide phase of hypersonic vehicle. Based on hypersonic vehicle motion and engagement model, the 3D integrated guidance and control (IGC) model is constructed. The backstepping-high order sliding mode (BHOSM) control scheme is proposed based on backstepping method and the high-order sliding mode (HOSM) method. The backstepping controller is designed to solve the problem of under-actuation in the IGC model. The HOSM controller is designed to overcome the uncertainty, strong coupling and nonlinear problems of IGC system. According to Lyapunov's theorem, the states of the closed loop system are proved to be uniform bounded. Finally, the effectiveness and reliability of the proposed method is verified and studied by simulation experiments.