ROCK REDUCING DEVICE FOR SHIP

PURPOSE:To increase the rock reducing device for ship by determining a control amount according to the relative amount of a rolling to a pitching and controlling the control panels of a fin and trim tab. CONSTITUTION:A roll angular velocity and a pitch angular velocity detected by a roll angular velocity detecting means 16 and a pitch angular velocity detecting means 17, respectively, are input by an abnormal signal judgment means 20 to judge whether they are normal or not. When they are normal, they are input into a control amount distributing means 22. Also the control amount distribution means 22 adjusts, using a proper control method, the roll control amount or pitch control amount distributedly by the relative amounts of roll components and pitch components. The control amount is output to a control panel control means 23 as an actual roll component command value and an actual pitch component command value. Then they are output as control signals to a fin drive device 26 and a trim tab drive device 27 through a control panel operating amount limiting means 24 so as to control a fin and trim tab to specified angles.