Research on Simplifying the Motion Equations for Submarine Training Simulator Based on Sensitivity Index

Submarine training simulator utilize the high technology devices to train the sailor in the safe, high-efficiency and realistic environment while reducing the dangerous quality and fund in actual training. Solving the six dimension motion equations of submarine plays a significant role in the training simulator. As the 108 hydrodynamic coefficients are hard to acquire completely, and the low solving speed because of the complex equations, it is necessary to simplify the equations in the range of accepted deviation. In this paper, the submarine motion model is analyzed, the motion equation is simplified, a sensitivity index is introduced, and three typical maneuver simulation tests are chosen as the research subjects. The influence of hydrodynamic coefficients for the maneuverability is evaluated. The simulation results prove the feasibility of the simplified method.