Adaptive exponential time-varying sliding mode control for hypersonic cruise vehicles

This paper describes the design of an adaptive exponential time-varying sliding mode control (AETVSMC) with strong robustness for hypersonic cruise vehicles subject to parametric uncertainties on the inertial and aerodynamic coefficients. An adaptation scheme is adopted to deal with unknown but bounded system uncertainties. Thus, the selection of switching gains can be obtained on-line and the upper bounds of the model uncertainties are not required to be known in advance. Stability analysis of the closed-loop system is derived based on the Lyapunov theory. Finally, simulation results demonstrate the effectiveness and robustness of the proposed approach.