Abstract

The invention relates to a device for damping a vessel's motion using a lifting effect, comprising at least one first stabilisation element that extends from the vessel's hull, below the water line, on a side of the vessel, which at least one stabilisation element is configured as a wing, sensor means for sensing the vessel's motion and delivering control signals on the basis thereof, as well as moving means for moving the at least one wing-shaped stabilisation element relative to the hull. According to the invention, the system is to that end characterised in that the moving means are configured for imparting a pivoting movement in the direction of the stem or the stern of the vessel to the at least one wing-shaped stabilisation element and setting a tilt angle of the at least one wing-shaped stabilisation element relative to the ship's hull in dependence on the speed of the vessel and the control signals delivered by the sensor means, such that the lifting effect generated by the at least one wing-shaped stabilisation element will have a damping effect on the ship's motion being sensed.

IPC Classes  ?

• B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water

Abstract

The invention relates to a system for actively damping a ship's motion, comprising at least one first rotatable stabilization element extending from the ship's hull, below the water line, on a side of the ship, sensor means for sensing the ship's motion and delivering control signals on the basis thereof to driving means for rotatably driving the stabilization element for the purpose of damping the ship's motion being sensed, as well as moving means for moving the stabilization element relative to the ship. According to the invention, the active stabilization system is to that end characterized in that the moving means are configured to impart a precession motion to the at least one rotatable stabilization element in dependence on the ship's sailing speed and the control signals being delivered by the sensor means. Imparting a precession movement to the rotating stabilization elements obviates the need to constantly change the direction of the mass of the stabilization elements. Instead, only the direction of rotation of the stabilization elements needs to be constantly reversed and adjusted for speed.

IPC Classes  ?

• B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
• B63B 39/04 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using gyroscopes directly

Abstract

The invention relates to a device for damping a vessel's motion using a lifting effect, comprising at least one first stabilisation element that extends from the vessel's hull, below the water line, on a side of the vessel, which at least one stabilisation element is configured as a wing, sensor means for sensing the vessel's motion and delivering control signals on the basis thereof, as well as moving means for moving the at least one wing-shaped stabilisation element relative to the hull. According to the invention, the system is to that end characterised in that the moving means are configured for imparting a pivoting movement in the direction of the stem or the stern of the vessel to the at least one wing-shaped stabilisation element and setting a tilt angle of the at least one wing-shaped stabilisation element relative to the ship's hull in dependence on the speed of the vessel and the control signals delivered by the sensor means, such that the lifting effect generated by the at least one wing-shaped stabilisation element will have a damping effect on the ship's motion being sensed.

IPC Classes  ?

• B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water

Abstract

The invention relates to a system for actively damping a ship's motion, comprising at least one first rotatable stabilisation element extending from the ship's hull, below the water line, on a side of the ship, sensor means for sensing the ship's motion and delivering control signals on the basis thereof to driving means for rotatably driving the stabilisation element for the purpose of damping the ship's motion being sensed, as well as moving means for moving the stabilisation element relative to the ship. According to the invention, the active stabilisation system is to that end characterised in that the moving means are configured to impart a precession motion to the at least one rotatable stabilisation element in dependence on the ship's sailing speed and the control signals being delivered by the sensor means. Imparting a precession movement to the rotating stabilisation elements obviates the need to constantly change the direction of the mass of the stabilisation elements. Instead, only the direction of rotation of the stabilisation elements needs to be constantly reversed and adjusted for speed.

IPC Classes  ?

• B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
• B63B 39/04 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using gyroscopes directly

Abstract

The invention relates to a method and device for actively damping a ship's motion while the ship is sailing including 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. v) setting the stabilization 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.

IPC Classes  ?

• B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
• B63B 1/34 - Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction

Abstract

The invention relates to an active roll stabilization system for ships, including at least one stabilization element extending below the water line, which is mounted on a rotary shaft that extends through the ship's hull, a sensor for sensing the ship's movements and delivering control signals on the basis thereof to rotation member for rotating the rotary shaft for the purpose of damping the ship's movements that are being sensed through the stabilization element. The object of the invention is to provide an active roll stabilization system for ships that can be used both with ships which are underway and with ships that are at anchor. According to the invention, the active roll stabilization system is to that end wherein the stabilization element is provided with a sub-element that is movable with respect to the stabilization element. This makes it possible to impart an additional lifting moment to the ship via the stabilization element, both while the ship is sailing and while the ship is at anchor, for the purpose of effectively damping or countering the ship's movements that are being sensed.

IPC Classes  ?

• B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water