Adaptive variable structure guidance law for passive torpedos

In connection with the low accuracy of parameters that is attained for laws of guidance in the passive underwater environment, an adaptive variable structure guidance law (AVSGL) for passive torpedos is studied in this paper. Based on rigorous theoretical deduction and simulation results, it is seen that the guidance law is highly robust to noise and parameter disturbance. Simulation studies show that the AVSGL performs high guidance accuracy even though the target maneuvers. Further more, it is ready to implement and convenient for engineering applications.