Modeling and simulation of wave disturbances for dynamic positioning ship

In order to effectively calculate the effect acted on dynamic positioning(DP) ships by waves,the mathematical model of the wave environmental disturbances is established.Based on the Matlab/Simulink,a simulation platform for the wave disturbance is set up to calculate the effect between ocean environment with wave disturbing force and moment of dynamic positioning ship in any wave height and any wave angle.A supply ship is taken as an example,the influence of wave disturbances forces and moments on the positions of the ship are forecasted based on different wave height and wave angle.Simulation results show the effectiveness of the proposed mathematical model.The simulation platform can be used for testing the design of dynamic positioning systems controller,which can improve the performance and robustness of the system in extreme sea conditions.