Optimal Combination Strategy for Two Swim-Out Acoustic Decoys to Countermeasure Acoustic Homing Torpedo

The optimal combination strategy for two swim-out acoustic decoys to countermeasure acoustic homing torpedo is studied. The kinetics models of torpedo, submarine and decoys are established, followed with homing algorithm and re-search strategy of torpedo. Based on the assessment criterion of decoys playing against acoustic torpedoes, the genetic algorithm is applied to obtain the optimal countermeasure strategy for the submarine using two decoys under different torpedo warning angles, where the countermeasure strategy considers decoy fire time, decoy turn angles, decoy speeds, submarine evading angle and evading speed. Simulation results show the validity and rapidity of the algorithm.