Research on variable structure guidance law for large-airspace spiral maneuver of missile

The large-airspace varying trajectory is modified to large-airspace spiral maneuver trajectory,in order to improve supersonic anti-warship missile penetration effect against enemy long-distance ship-to-air missile. For the missile's descending phase can suffer interception of long-distance ship-to-air missile, the descending phase is modified to spiral maneuver descending trajectory. In order to accomplish this trajectory and to ensure smoothly transfer to low altitude cruise phase after descending phase,a variable structure guidance law with spiral maneuver is proposed. Finally,the simulation of large-airspace spiral maneuver trajectory is performed,and the attack-defense counterwork simulation between anti-warship missile and long-distance ship-to-air missile is also performed. The simulation results show that the penetration probability of anti-warship missile with large-airspace spiral maneuver trajectory increases 90. 7% than that with former large-airspace varying trajectory.