Applying of Fuzzy Logic to Precise Control of the Ship Motion

Abstract

The subject of this article is an attempt to solve control problems commonly found in the automatic precise control systems of the ship in in low speed motion. Control of fuzzy systems are finding wide practical applications to making decision to control and modelling of complex of control systems of ship. This paper explores fuzzy logic and it helps navigators in making best possible decision in the process of steering the ship. A method of fuzzy logic, which mathematically emulates human reasoning, provides an intuitive way to design function blocks for intelligent control systems of the ship motion. Automatic control systems deploying fuzzy logic can improve the management of uncertain variables, such as making decision to steering of the ship in low speed motion. The paper consists of the following sections. It starts with a brief description of dynamical and kinematical equations of the ship's motion and their frames of reference. Then a fuzzy control law and a control algorithm are presented. Next selected simulation results are provided. Finally, in the last section some conclusions are given.