Study on fuzzy-extension control system for marine steering

Automatic marine steering is an integral part of intelligent vehicle control system. It includes course keeping and course changing. Its main purpose is to ensure that ships sail in the given direction automatically in spite of changes in sea conditions, wind and other disturbances. Fuzzy control is the well-known fact that fuzzy logic systems need no accurate mathematical models of the system under control. Extension logic, based on extension set, is to research the contradictory problem. The combination of extension theory and control theory brought a new type of intelligent control - extension control. This paper presents fuzzy-extension control method for marine steering. The paper established the model of fuzzy-extension control system and studied the design of fuzzy-extension controller. Simulation results demonstrate that the control method is valuable.