Design of head-pursuit guidance law based on sliding mode control

This paper proposes a new head-pursuit guidance law based on sliding mode control to intercept hypersonic vehicle in terminal phase. In order to alleviate chattering phenomenon caused by sliding mode control and ensure the convergence speed, the combination of linear sliding variable and fast power reaching law is adopted. Furthermore, an adaptive sliding mode guidance law is designed for solving the problem of unknown upper bound of the disturbance. Also, these algorithms are proved by the theoretical perspective based on finite-time convergence theory. Finally, numerical simulations are presented to illustrate the correctness and effectiveness of the methods.