Cooperative Smooth Nonsingular Terminal Sliding Mode Guidance with Tracking Differentiator for Active Aircraft Defense

Aimed at the poor performance of guidance algorithms designed based on a linearized model in active defense under large leading angle deviation, both-way and one-way cooperative sliding mode smooth nonsingular terminal for missile are proposed. The relative kinematics models target, missile, attacking established. In design process, two surfaces constructed zero-effort miss distance velocity, as well their integral values. A tracking differentiator is introduced excessive initial command deviation to meet overload constraints target. sensitivity law estimated time-to-go error reduced, target allowed perform an independent evasive maneuver. effectiveness proposed strategy verified by numerical simulation compared existing strategies, high accuracy, anti-chattering, strong robustness algorithm verified.