Modeling and Simulation of Cooperative Defense Against Acoustic Homing Torpedo with Hovering Acoustic Decoy and Hovering Depth Charge Array

Properly deploying hovering acoustic decoy and hovering depth charge array to counter acoustic homing torpedo is of great importance for a surface ship. This paper establishes an operational model of ship countering torpedo with hovering acoustic decoy and hovering depth charge array, defines the launch strategy of hovering acoustic decoy and hovering depth charge array and the evading course of surface ship by using extremum method and the non-linear planning method, and effectively combines the deploying of decoy and depth charge array with the evasive maneuver to achieve the best countering effect. Simulation results show that the proposed method can effectively counter coming torpedo by combining the soft-kill and hard-kill anti-torpedo measures, and enhance the probability of intercepting torpedo by 10% ~30%.