Abstract
The high-speed catamaran boat used by this study has attached trim tabs to the stern both sides as the anti-rolling device for reducing the rolling. A PD control was initially employed in the system, and the observed data from the instrument showed the anti-rolling effect. However no significant improvement was observed for passengers although instrumental data showed good results. Therefore, it is not evaluated highly as the -rolling device. In this paper, fuzzy control system is applied to the anti-rolling device of a high-speed catamaran boat in order to improve the passenger comfort. Measurements of rolling data using the real ship were carried out. From the analysis results of the frequency analysis, the presented fuzzy control system suppressed the rolling of ship about 60% in maximum peak than the PD control. Also, crews have felt the anti-rolling effect of the fuzzy control, and it showed that this system provided good comfort ride.
