Cooperative sliding-mode guidance law for active protection

As compared with the attacking missile, the aircraft had the disadvantages of flight speed and maneuverability. To improve the survivability, the aircraft could launch a defending missile to intercept the attacker and correspondingly, a cooperative guidance law of defending missile was presented based on adaptive sliding-mode control. This guidance law was a kind of line of sight (LoS) guidance approach in essence, which guided the defending missile to locate inside the LoS between the aircraft and the attacking missile for active defense. The simulations show that this guidance law has the advantages of maneuvering performance and intercepting performance compared to the proportional navigation because of the cooperation with the aircraft and has strong robustness to the speed variations of the three bodies and the maneuver of the attacking missile.