AC servo motor hydraulic units for ship motion control
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F15B-015/18
B63B-039/06
출원번호
US-0507498
(2014-10-06)
등록번호
US-10040520
(2018-08-07)
발명자
/ 주소
Venables, John D.
Pappas, Christopher M.
출원인 / 주소
Naiad Maritime Group, Inc.
대리인 / 주소
St. Onge Steward Johnston and Reens
인용정보
피인용 횟수 :
0인용 특허 :
17
초록
An AC motor hydraulic system which utilizes a plurality of centrally controlled AC servo motor driven hydraulic pumps with integrated reservoirs to effectuate rotation of a plurality of stabilizer fins mounted about a vessel to automatically counter unwanted movement of a vessel.
대표청구항▼
1. A servo motor hydraulic system for ship motion control, comprising: a motion sensor;a stabilization controller in communication with the motion sensor, said stabilization controller receiving and processing data and determining righting movements;a plurality of servo motor hydraulic assemblies, e
1. A servo motor hydraulic system for ship motion control, comprising: a motion sensor;a stabilization controller in communication with the motion sensor, said stabilization controller receiving and processing data and determining righting movements;a plurality of servo motor hydraulic assemblies, each assembly comprising its own: servo controller in communication with the stabilization controller;servo motor in communication with the servo controller to allow the servo motor to receive signals to drive the servo motor;hydraulic pump which is driven by the servo motor;hydraulic actuator in communication with the hydraulic pump wherein said hydraulic actuator includes a hydraulic cylinder and piston assembly;wherein the servo controller receives commands from the stabilization controller and commands the servo motor to change a direction with which the servo motor is driven to thereby change a direction with which the hydraulic pump is driven, wherein the commands extend or retract the actuator thereby causing rotation of at least one of said plurality of fins; andan integrated reservoir which is in communication with the hydraulic pump;a plurality of bodies, each in communication with the actuator of a servo motor hydraulic assembly;wherein upon the extension or retraction of the actuator, said bodies produce the desired righting movements;wherein each one of said plurality of servo motor hydraulic assemblies is its own closed loop hydraulic system. 2. The servo motor hydraulic system of claim 1, further comprising a plurality of body position sensors in communication with its own body of the plurality of bodies, and in further communication with its own servo controller and the stabilization controller, wherein the body position sensors periodically detect and report the position of the body it senses. 3. The servo motor hydraulic system of claim 2, wherein the position of the body that is reported is angular position. 4. The servo motor hydraulic system of claim 1, wherein the bodies comprise a tiller arm and a rotating fin. 5. The servo motor hydraulic system of claim 1, wherein each one of the plurality of servo motor hydraulic assemblies is a closed loop. 6. The servo motor hydraulic system of claim 1, wherein said hydraulic actuator is a plurality of hydraulic actuators. 7. The servo motor hydraulic system of claim 1, wherein the motion sensor detects roll. 8. The servo motor hydraulic system of claim 1, wherein the servo motor and hydraulic actuator, while the servo motor hydraulic system is turned on, stop work when stabilization is paused or when a desired body position is reached. 9. The servo motor hydraulic system of claim 1, wherein each one of the plurality of servo motor hydraulic assemblies is installed on or near the body it is in communication with. 10. The servo motor hydraulic system of claim 1, further comprising a fluid filtration system integrated within the servo hydraulic unit. 11. The servo motor hydraulic system of claim 1, wherein the servo controller and servo motor are powered by alternating current. 12. The servo motor hydraulic system of claim 1 wherein the commands include commands to change a speed of the servo motor. 13. A servo motor hydraulic system for ship motion control, comprising: a plurality of fins;a plurality of tiller arms, each in communication with a fin;a plurality of servo motor hydraulic assemblies, each assembly comprising its own: at least one hydraulic actuator in communication with a tiller arm;hydraulic pump in communication with the at least one hydraulic actuator;servo motor which drives the hydraulic pump;servo controller in communication with the servo motor;wherein said servo motor receives commands from the servo controller to extend or retract the at least one hydraulic actuators thereby causing rotation of at least one of said plurality of fins; andan integrated reservoir which is in communication with the hydraulic pump;a stabilization controller in communication with the servo motor controllers of the plurality of servo motor hydraulic assemblies;a motion sensor in communication with the stabilization controller;wherein the stabilization controller receives and processes data from the motion sensor, determines righting movements, and sends appropriate commands to the at least one servo motor controller of the servo motor hydraulic assemblies wherein the servo motor and hydraulic actuator, while the servo motor hydraulic system is turned on, stop work when stabilization is paused or when a desired body position is reached. 14. The servo motor hydraulic system of claim 13, further comprising a plurality of body position sensors in communication with its own body of the plurality of bodies, and in further communication with its own servo controller and the stabilization controller, wherein the body position sensors periodically detect and report the position of the body it senses. 15. The servo motor hydraulic system of claim 13, wherein the servo motor hydraulic unit is closed loop. 16. The servo motor hydraulic system of claim 13, wherein the motion sensor detects roll. 17. The servo motor hydraulic system of claim 13, wherein the servo motor and hydraulic actuator stop work when stabilization is paused or when a desired fin position is reached. 18. The servo motor hydraulic system of claim 13 wherein the commands include commands to change a speed of the servo motor. 19. A method of ship motion control, comprising the steps of: sensing the motion of a ship;determining appropriate righting movements based on the motion of the ship;signaling a plurality of electric motors with a direction command wherein each of the plurality of electric motors corresponding to one of a plurality of integrated servo motor driven hydraulic pumps which drive a hydraulic cylinder and piston assembly to effectuate rotation of a plurality of bodies to provide an appropriate righting movementsaid signaling modifying a direction of a hydraulic pump of the plurality of integrated servo motor driven hydraulic pumps. 20. The method of ship control of claim 19, further comprising the steps of: observing the current positions of the plurality of bodies;utilizing body position data in determining appropriate righting movements. 21. The method of ship control of claim 19, further comprising the step of utilizing body position data to stop the operation of an appropriate servo motor driven hydraulic pump when the associated body has reached an appropriate righting position. 22. The method of claim 19 wherein each integrate servo motor driven hydraulic pumps includes its own reservoir. 23. The method of claim 19 wherein said signaling step further includes a speed command to modify a speed of the electric motors. 24. A servo motor hydraulic system for ship motion control, comprising: a plurality of fins;a plurality of tiller arms, each in communication with a fin;a plurality of servo motor hydraulic assemblies, each assembly comprising its own: at least one hydraulic actuator in communication with a tiller arm;hydraulic pump in communication with the at least one hydraulic actuator;servo motor which drives the hydraulic pump;servo controller in communication with the servo motor;wherein said servo motor receives commands from the servo controller to extend or retract the at least one hydraulic actuators thereby causing rotation of at least one of said plurality of fins; andan integrated reservoir which is in communication with the hydraulic pump;a stabilization controller in communication with the servo motor controllers of the plurality of servo motor hydraulic assemblies;a motion sensor in communication with the stabilization controller;wherein the stabilization controller receives and processes data from the motion sensor, determines righting movements, and sends appropriate commands to the at least one servo motor controller of the servo motor hydraulic assemblies to change a fin position wherein between commands and while the servo motor hydraulic system is activated the servo motor and hydraulic actuator stop work. 25. The servo motor hydraulic system of claim 24 wherein the commands include commands to change a direction of the servo motor to thereby change a direction of the hydraulic pump. 26. The servo motor hydraulic system of claim 25 wherein the commands include commands to change a speed of the servo motor.
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이 특허에 인용된 특허 (17)
Oehlgrien, Ralf; Chen, Zhenfu, Automatic stabilizing unit for watercrafts.
Ehluss Heinz-Gnter (Tornesch DEX) Wessel Erich (Hamburg DEX) Oldach Uwe (Hamburg DEX), Hydraulic system for ship rudder roll stabilization and steering.
Rudolf William B. (10001 Point Aux Chenes Rd. Ocean Springs MS 39564), Retractable steering device for cargo barges that increases maneuverability by providing a pivot point or points when al.
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