Study on the guided trajectory of anti-torpedo torpedo

Anti-torpedo torpedoes (ATT), as a kind of new defense underwater weapon, are widely applied on the active defense systems. In order to effectively combat the target, ATT needs better manipulation and faster navigation strategy. In the present paper, the guided trajectory of ATT is studied in detail by motion simulation. In order to study the guided trajectory characteristics of ATT, the kinematics and dynamics analysis of ATT are conducted firstly. And then, the lateral motion model of ATT is established based on the theorem of momentum and moment of momentum. In addition, the constraint equations of classical guidance methods which include the tail tracking method, fixed advance angle method, proportional approaching method and automatic advance angle method are established based on the relative motion equations between ATT and incoming torpedo. What's more, the three combined guidance methods of ATT are proposed in the present study. In the end, based on the lateral movement model of ATT and the constraint equations, the guided trajectory simulations of ATT with different guidance methods are conducted. Simulation results show that the combined guidance methods can effectively compensate for the defects of single classical guidance methods.