Adaptive Guidance Method of Homing Torpedo under Underwater Acoustic Countermeasure Condition

Modern acoustic countermeasure and counter-countermeasure environments become more and more complex, so it is necessary to consider target recognition and terminal guidance perpendicular hit in the design of guidance law for a homing torpedo. This paper proposes a new adaptive guidance method for a homing torpedo, in which the torpedo course angle is adjusted according to the distance between a torpedo and a target, and the target azimuth trend recogni-tion and the requirement of guidance trajectory for terminal guidance perpendicular hit are taken into account, so that the target′s relative bearing angle can facilitate the recognition and the hit. Simulation results show that the variation of target′s relative bearing angle obtained by the proposed method facilitates both the target recognition and the perpen-dicular target hit.