Nonlinear dynamics performance prediction of large AUV

In this paper, considering the impact of current environment, the stress of the large AUV was analyzed and its motion simulation model based on the six degrees freedom of motion equations was established. Working on a hull with wings as the computational model by using CFD software to simulate tank experiments, the major hydrodynamic coefficients of the large AUV were calculated. With the same method, the lift and drag curves of rudders were obtained. Found on those data, established the manipulation motion simulation system of the large AUV to analyzed its maneuverability in the horizontal and vertical. Simulation results show that this AUV has a good maneuverability, while the motion simulation system can provide some technical support for the design and debug of the AUV´s controller.