Aiming at the difficulty of the dynamic positioning process and trajectory control under the influence of complex disturbance, ship dynamic positioning control based on the nonlinear fuzzy algorithm is studied. By analyzing the composition and task of the ship dynamic positioning system, the nonlinear characteristics of the ship dynamic positioning system are obtained, and the ship dynamic pose is described by the combined coordinate system of the geodetic coordinate system, ship hull coordinate system, and multi-degree-of-freedom coordinate system. The dual fuzzy proportional, integral, derivative (PID) algorithm is applied to the point control and surface control and an approximate algorithm is adopted to calculate the target control parameters, so as to enhance the comprehensive effectiveness of ship hull nonlinear control results. The experimental results show that the control effect of this method is better and the heading angle control error is smaller. Meet the dynamic positioning ship control needs.
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