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 th
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.
대표청구항▼
The invention claimed is: 1. An active roll stabilization system for ships at anchor, comprising at least one stabilization element extending below the water line, which is mounted on a rotary shaft that extends through and has a fixed orientation relative to the ships hull, sensor means for sensin
The invention claimed is: 1. An active roll stabilization system for ships at anchor, comprising at least one stabilization element extending below the water line, which is mounted on a rotary shaft that extends through and has a fixed orientation relative to the ships hull, sensor means for sensing the ship's movements at anchor and delivering control signals on the basis thereof to rotation means for rotating the rotary shaft for the purpose of damping the ship's movements that are being sensed by means of the stabilization element, wherein the stabilization element is provided with a sub-element that is movable with respect to the rotating stabilization element as part of the stabilization action based on the control signals delivered by said sensor means thereby imparting an additional lifting moment to the ship via the stabilization element for the purpose of damping the ship's movements that are being sensed while the ship is at anchor. 2. An active stabilization system according to claim 1, wherein said sub-element is pivotable about a sub-shaft. 3. An active stabilization system according to claim 2, wherein the sub-pivot extends parallel to the rotary shaft. 4. An active stabilization system according to claim 1, wherein the sub-element is slidably accommodated in a space formed in the stabilization element. 5. An active stabilization system according to claim 4, wherein the sub-element is pivotably connected with the stabilization element. 6. An active stabilization system according to claim 4, wherein the sub-element is slidably in a direction parallel to the longitudinal axis of the ship. 7. An active stabilization system according to claim 4, wherein the sub-element is slidably in a direction transverse to the longitudinal axis of the ship. 8. An active stabilization system according to claim 1, wherein the sub-element is capable of movement independently of the rotary movement of the stabilization element. 9. An active stabilization system according to claim 1, wherein the sub-element has a curved shape. 10. An active stabilization system according to claim 1, wherein the sub-element has a wing shape. 11. An active stabilization system according to claim 1, wherein the sub-element is made of a flexible material. 12. An active stabilization system according to claim 1, wherein the rotation means comprise at least one piston-cylinder combination, said piston being operably connected to the rotary shaft. 13. An active stabilization system according to claim 12, wherein the rotation means comprise two piston-cylinder combinations, each piston being connected on either side of the longitudinal direction of the rotary shaft to a yoke mounted to the shaft end that extends into the ship's hull. 14. An active stabilization system according to claim 1, wherein drive means are present for driving the sub-element, which drive means are at least partially accommodated in the stabilization element. 15. An active stabilization system according to claim 14, wherein the rotary shaft is of hollow construction, and the drive means also comprise a drive shaft that is carried through said hollow, rotary shaft. 16. An active stabilization system according to claim 15, wherein the drive means comprise a linkage accommodated in the stabilization element, which linkage is connected to the sub-element on the one hand and to the drive shaft on the other hand. 17. An active stabilization system according to claim 14, wherein the drive means comprise at least one extension element accommodated in the stabilization element, which is connected to the sub-element, for extending and retracting the sub-element. 18. An active stabilization system according to claim 17, wherein said extension element forms part of a spindle driving mechanism. 19. An active stabilization system according to claim 17, wherein said extension element forms part of a piston-cylinder combination. 20. An active stabilization system according to claim 1, wherein the position of the sub-element with respect to the stabilization element is adjustable in dependence on the speed of movement of the ship. 21. A ship provided with an active stabilization system according to claim 1. 22. A method for active roll stabilization of ship at anchor through the use of an active stabilization system according to claim 1, which method comprises the steps of: A) sensing the ship's movements at anchor B) delivering control signals on the basis thereof for rotating the rotary shaft for the purpose of C) damping the ship's movements that are being sensed by means of the stabilization element by rotating the rotary shaft, the method being further characterized by the steps of: E) adjusting the position of the sub-element with respect to the stabilization element based on the control signals and imparting an additional lifting moment to the ship via the stabilization element for the purpose of damping the ship's movements at anchor that are being sensed.
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이 특허에 인용된 특허 (6)
Koop, Mattheus Theodorus; Dinnissen, Lambertus Johannes Maria, Active roll stabilization system for ships.
Beauchamp Charles H. (Jamestown RI) Cincotta ; Jr. Manuel (Tiverton RI) Raffa Anthony V. (Newport RI) Gauthier Benoit G. (Little Compton RI), Articulated fin/wing control system.
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