Finite time convergent sliding-mode guidance law with impact angle constraint

Based on the finite time convergence stability theory and the variable structure control, a finite time convergent sliding-mode guidance law with terminal impact angle constraint is presented. The analysis manifests that the guidance system is convergent. It is proved that, before the final time of the guidance process, the line-of-sight rate will converge to zero in finite time and the terminal impact angle will meet the requirement. Finally, the simulation results show that the guidance law is effective.