Simulation Analysis on Two Methods for Incoming Torpedo Trajectory Prediction

In order to plan a sufficient defense strategy for surface ships, it is important to consider the threat of torpedoes. By obtaining incoming torpedo motion parameters, the trajectory of an incoming torpedo can be predicted. First, according to torpedo defense characteristics, the principle of solving target motion parameters is analyzed based on a two-bearings, one-distance, and one-velocity (2B1D1V) model. The algorithm simulation of the actual trajectory prediction method is described and discussed. And then, the azimuth guidance model for a wire-guided torpedo and the trajectory prediction models for a straight-running torpedo, acoustic-homing torpedo, and wake-homing torpedo are generalized. The algorithm simulation of the estimated trajectory prediction method is also described and discussed. Finally, synthetic environment simulations based on two types of trajectory algorithms are compared, and solutions of torpedo trajectory dispersion are extracted. The accuracy and objectivity of torpedo trajectory dispersion prediction is improved, and the torpedo defense response of a surface ship can be supported by the synthetic application of either type of trajectory algorithm.