An Evaluation Method of Ocean Current Impacting on Underwater Vehicle Navigation Based on D Numbers Theory

In view of the threat brought by complex marine environment to the navigation safety of underwater vehicles, a navigation safety situation evaluation method based on D numbers theory is proposed in this paper after considering the plane ocean current impacting. Firstly, through the brief analysis of the influence of ocean current on the vehicle navigation, the evaluation indicators are determined, and a D numbers construction method based on interval distance is proposed. Then, the D numbers integration representation is used to obtain the overall evaluation of each indicator on the quantitative evaluation grades. Finally, the super-standard weight is used to determine the weight of each indicator, and the comprehensive safety situation index is obtained after the fusion of multiple indicators. The simulation results show that the proposed approach can reflect the actual situation to a certain extent, and has a reference significance in the safe navigation of underwater vehicle.