Adaptive Continuous Higher Order Sliding Mode Control of Air Breathing Hypersonic Missile for Maximum Target Penetration

Abstract

Hypersonic missile control is studied in the terminal phase and addressed using adaptive continuous higher order sliding mode (AHOSM) control techniques. The AHOSM controller, specifically the continuous HOSM finite reaching time controller driven by the continuous adaptive second order (super-twisting) sliding mode disturbance observer has been proposed and studied. The adaptive algorithm is based on equivalent control concept and allows not overestimating the control gain that mitigates the control chattering. The proposed continuous AHOSM control has been validated via simulations of a hypersonic missile in the terminal phase. The robustness and high accuracy of the output tracking in the presence of matched and unmatched external disturbances and missile model uncertainties was demonstrated.