Super-twisting sliding mode control based on Lyapunov analysis for the cursing flight of hypersonic vehicles

In this paper, the tracking control for air-breathing hypersonic vehicles in cruising flight is studied, where the super-twisting algorithm is utilized to design a continuous controller. The nonlinear transformation is used to clarify a control-oriented model for hypersonic vehicles. A second order sliding mode controller based on the super-twisting algorithm is designed for the tracking of velocity and altitude, and Lyapunov approach is involved to analyze the stability of closed loop system, which also demonstrates that sliding mode surfaces converge in a finite time. The super-twisting sliding mode control has the ability to reduce chattering and also is robust against varying parameters. Simulations are shown to validate that the proposed method has reduced chattering efficiently and the robustness has been also guaranteed.