Method for actively damping a ship's motion as well as such an active roll stabilisation system

摘要

The invention relates to a method for actively damping a ship's motion while the ship is sailing by driving at least one first rotatable damping element that extends from the ship's hull, below the water line, on a side of the ship. The invention also relates to a device for actively damping a ship's motion, comprising at least one first rotatable damping element extending from the ship's hull, below the water line, on a side of the ship. Accordingly it is an object of the invention to provide a method and an active system for stabilising a ship's motion as described in the introductory paragraph which can only be used with ships while sailing. According to the invention, the method is characterised by the steps of: i) sensing the ship's motion and sailing speed, ii) generating and delivering control signals on the basis of step i), iii) rotatably driving the stabilisation elements on the basis of step ii), iv) determining, on the basis of step i), the current frictional resistance experienced by the stabilisation elements at the sensed motion and sailing speed of the ship, v) setting the stabilisation element at an angle relative to a longitudinal axis of the ship on the basis of the determined current frictional resistance and a desired minimum frictional resistance.