EP4116186A1 - Steering device - Google Patents
Steering device Download PDFInfo
- Publication number
- EP4116186A1 EP4116186A1 EP21765320.3A EP21765320A EP4116186A1 EP 4116186 A1 EP4116186 A1 EP 4116186A1 EP 21765320 A EP21765320 A EP 21765320A EP 4116186 A1 EP4116186 A1 EP 4116186A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rudder
- steering
- mode
- steering mode
- setting unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001141 propulsive effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B79/00—Monitoring properties or operating parameters of vessels in operation
- B63B79/10—Monitoring properties or operating parameters of vessels in operation using sensors, e.g. pressure sensors, strain gauges or accelerometers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/08—Steering gear
- B63H25/14—Steering gear power assisted; power driven, i.e. using steering engine
- B63H25/18—Transmitting of movement of initiating means to steering engine
- B63H25/24—Transmitting of movement of initiating means to steering engine by electrical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
- B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H2025/066—Arrangements of two or more rudders; Steering gear therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
- B63H2025/387—Rudders comprising two or more rigidly interconnected mutually spaced blades pivotable about a common rudder shaft, e.g. parallel twin blades mounted on a pivotable supporting frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
Definitions
- This invention relates to a technique for steering a ship equipped with a rudder having two rudder plates.
- a rudder system for ships e.g., Gate Rudder TM
- two rudder plates are arranged to flank a propeller from both sides perpendicular to the direction of propulsion. Since the gate rudder does not obstruct the propulsive flow behind the propeller, it substantially improves the propulsive capability of the propeller and thus the fuel efficiency of the ship, compared to conventional rudders located behind the propeller.
- a steering device which comprises a driving mechanism for rotating steering shafts, and a power mechanism for driving the steering shafts, in which two steering shafts are rotatably arranged with vertical rotation axes located on both sides of the propeller shaft, an upper portion of each of the rudder plates is connected to and suspended from each steering shaft, and rotation of the two steering shafts can turn the two rudder plates from the position aside the propeller to the down stream side of the propeller where the propeller aft flow is mostly blocked directly behind the propeller (e.g., Patent Document 1).
- Patent document 1 JP 5833278
- the problem to be solved by the present invention is to provide a steering device that can switch steering modes.
- a steering device for steering a rudder comprising two rudder plates disposed so as to flank a propulsion device from lateral directions, includes a mode setting unit that sets a steering mode to either a first steering mode in which the rudder is steered with the two rudder plates kept substantially parallel to each other, or a second steering mode in which the rudder is steered with rear edges of the two rudder plates being positioned closer to each other than when in the first steering mode, and a rudder angle control unit that controls rudder angles of the two rudder plates according to the steering mode set by the mode setting unit.
- An aspect of the present invention provides a steering device that can switch between steering modes.
- Fig. 1 is a block diagram showing the configuration of the steering system.
- the steering system 1 is equipped with an ECS (Electronic Chart System) 2, a route control unit 3, a steering device 4, a ship's hull 10, a gate rudder 11 that changes the direction of travel of the hull 10, a driving device 12 that drives the gate rudder 11, and sensors 13 that detect the state of the hull 10.
- the sensors 13 include at least a gyrocompass to detect the heading of the hull 10, a GNSS sensor that detects the ship's position by a satellite positioning system (GNSS).
- the ECS 2 may be an ECDIS (Electronic Chart Display and Information System).
- the ECS 2 displays own ship and other ships on the electronic chart, as well as various information and user interface for the ship's navigator to set the ship's planned route.
- the ECS 2 also issues an entering notification to the steering device 4 indicating that the ship has entered a predetermined area.
- the route control device 3 performs navigation control to control the ship's position to follow the planned route set in the ECS 2, and heading control to control the ship's heading to follow the reference heading, and outputs the reference heading to the steering device.
- the steering device 4 includes a mode setting unit 41 whose steering mode is set to either a first or second steering mode by the mode setting process described below, and a rudder angle control unit 42 that controls the driving device 12, that drives the gate rudder 11, so that the ship's heading follows the reference heading in the steering mode set by the mode setting unit 41.
- FIGS. 2 and 3 show a schematic plan view and a schematic rear view, respectively, of the gate rudder configuration.
- the gate rudder 11 has two rudder plates 110a and 110b arranged to flank the propeller 14 from the lateral directions, i.e., perpendicular to the direction of the ship's propulsion and vertical direction, and two rudder shafts 111a and 111b provided corresponding to each of the rudder plates 110a and 110b.
- the two rudder plates 110a, 110 b are not specifically distinguished, they are simply referred to as a rudder plate 110.
- the two rudder shafts 111a and 111b are also referred to simply as a rudder shaft 111 when they are not specifically distinguished.
- the rudder plates 110 are substantially plate-shaped members installed substantially vertically.
- the rudder shafts 111 are installed at positions relatively offset inwardly in the lateral direction from the positions of the corresponding rudder plates 110, with the shaft's axes oriented substantially vertical, and the orientation of the rudder plates 110 are adjusted by the rotation of the corresponding rudder shafts driven by the driving device 12.
- Fig. 4 is a flowchart showing the operation of the steering mode setting process.
- Figs. 5 and 6 are schematic plan views showing the gate rudder when steered, respectively, into starboard and port directions in the first steering mode.
- Figs. 7, 8 and 9 are schematic plan views showing the gate rudder when steered, respectively, in the straight ahead, starboard, and port directions in the second steering mode.
- the mode setting unit 41 of the steering device 4 calculates the rate of turn (S101) based on the headings of the ship detected by the sensors 13 during a duration of time immediately after the true rudder angle has matched the rudder angle order by the rudder angle control unit 42, and determines whether the calculated rate of turn is less than a preset threshold value (S102).
- the mode setting unit 41 determines whether or not an entering notification has been issued by the ECS 2 (S103).
- the entering notification is issued when the ship is located within a predetermined area on the electronic chart displayed by the ECS 2, for example, areas within a certain distance from a wharf, mooring buoy, planned offshore anchorage point, offshore structure, etc.
- the mode setting unit 41 sets the steering mode of the rudder angle control unit 42 to the first steering mode (S104).
- the rudder angle control unit 42 controls the rudder angle of the gate rudder 11 in such a way that the two rudder plates 110 are kept parallel to each other, as shown in Figs. 2 , 5, and 6 .
- the rudder angle control unit 42 may also control the rudder angles of the gate rudder 11 to keep the rear sides of the two rudder plates 110 inclined outward in the lateral direction.
- the mode setting unit 41 sets the steering mode of the rudder angle control unit 42 to the second steering mode (S105).
- the rudder angle control unit 42 set to the second steering mode controls the rudder angle of the gate rudder 11 to keep the rear sides of the two rudder plates 110 inclined inward in the lateral direction, as shown in Figs. 7, 8 and 9 .
- the mode setting unit 41 sets the steering mode of the rudder angle control unit 42 to the second steering mode (S105).
- the gate rudder 11 can be steered appropriately for the navigational situation.
- the first steering mode is a steering mode in which the rudder is steered with the rudder plates held parallel or inclined outward
- the second steering mode is a steering mode in which the rudder is steered with the rudder plates held inclined inward
- the second steering mode may be a steering mode in which the rudder is steered with rear edges of the two rudder plates 110 kept closer to each other than in the first steering mode.
- the present embodiment is described for a ship equipped with a propeller 14, the ship may alternatively be a one equipped with other propulsion devices, for example, a water jet propulsion system, etc.
- the steering mode is switched based on the rate of turn; however, in this embodiment, the steering system differs from that of the first embodiment in that the steering mode is switched based on the speed-through-water instead of the rate of turn.
- Fig. 10 is a flowchart showing the operation of the steering mode setting process for this embodiment.
- the steering system 1 of this embodiment differs from that of the first embodiment in that the sensors 13 include a speed log that detects a speed-through-water of the hull 10, and the steering device 4 receives the speed-through-water detected by the sensors 13.
- the mode setting unit 41 of the steering device 4 determines whether or not the speed-through-water detected by the sensors 13 is less than or equal to a predetermined threshold value (S201).
- the threshold value is set based on the pre-confirmed rudder effectiveness against speed-through-water.
- the correlation between the speed-through-water and rudder effectiveness is established based on, for example, simulations using ship motion models, measurements from water tank experiments, and measurements from test sailing of real ships.
- the mode setting unit 41 sets the steering mode of the rudder angle control unit 42 to the first steering mode (S202).
- the mode setting unit 41 sets the steering mode of the rudder angle control unit 42 to the second steering mode (S203).
- the calculation of the rate of turn may be spared and the amount of calculation involved in setting the steering mode may be reduced by setting the steering mode based on the evaluation of speed-through-water against a threshold value, wherein the threshold value is set based on the rudder effectiveness or, in other words, the correlation between the rate of turn and the speed-through-water.
- the use of the speed-through-water allows a switching of the steering mode that takes account of the effects on the hull 10 from wind directions, wind speeds, and direction and speed of currents.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Traffic Control Systems (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
Description
- This invention relates to a technique for steering a ship equipped with a rudder having two rudder plates.
- In recent years, a rudder system for ships, e.g., Gate Rudder™, is known, in which two rudder plates are arranged to flank a propeller from both sides perpendicular to the direction of propulsion. Since the gate rudder does not obstruct the propulsive flow behind the propeller, it substantially improves the propulsive capability of the propeller and thus the fuel efficiency of the ship, compared to conventional rudders located behind the propeller.
- As a technique related to the gate rudder, a steering device is known, which comprises a driving mechanism for rotating steering shafts, and a power mechanism for driving the steering shafts, in which two steering shafts are rotatably arranged with vertical rotation axes located on both sides of the propeller shaft, an upper portion of each of the rudder plates is connected to and suspended from each steering shaft, and rotation of the two steering shafts can turn the two rudder plates from the position aside the propeller to the down stream side of the propeller where the propeller aft flow is mostly blocked directly behind the propeller (e.g., Patent Document 1).
- Patent document 1:
JP 5833278 - The problem to be solved by the present invention is to provide a steering device that can switch steering modes.
- In an embodiment, a steering device for steering a rudder comprising two rudder plates disposed so as to flank a propulsion device from lateral directions, includes a mode setting unit that sets a steering mode to either a first steering mode in which the rudder is steered with the two rudder plates kept substantially parallel to each other, or a second steering mode in which the rudder is steered with rear edges of the two rudder plates being positioned closer to each other than when in the first steering mode, and a rudder angle control unit that controls rudder angles of the two rudder plates according to the steering mode set by the mode setting unit.
- An aspect of the present invention provides a steering device that can switch between steering modes.
-
-
Fig. 1 is a block diagram of the steering system in the first embodiment. -
Fig. 2 is a schematic plan view of the gate rudder. -
Fig. 3 is a schematic rear view of the gate rudder. -
Fig. 4 is a flowchart showing the operation of the steering mode setting process for the first embodiment. -
Fig. 5 is a schematic plan view of the gate rudder when the ship is steered in the starboard direction in the first steering mode. -
Fig. 6 is a schematic plan view of the gate rudder when the ship is steered in the port direction in the first steering mode. -
Fig. 7 is a schematic plan view of the gate rudder when the ship is steered in the straight-ahead direction in the second steering mode. -
Fig. 8 is a schematic plan view of the gate rudder when the ship is steered in the starboard direction in the second steering mode. -
Fig. 9 is a schematic plan view of the gate rudder when the ship is steered in the port direction in the second steering mode. -
Fig. 10 is a flowchart showing the operation of the steering mode setting process for the second embodiment. - A steering device according to embodiments of the present invention will now be described with reference to the drawings.
- The configuration of a steering system according to the first embodiment is described below.
Fig. 1 is a block diagram showing the configuration of the steering system. - As shown in
Fig. 1 , thesteering system 1 is equipped with an ECS (Electronic Chart System) 2, aroute control unit 3, asteering device 4, a ship'shull 10, agate rudder 11 that changes the direction of travel of thehull 10, adriving device 12 that drives thegate rudder 11, andsensors 13 that detect the state of thehull 10. Thesensors 13 include at least a gyrocompass to detect the heading of thehull 10, a GNSS sensor that detects the ship's position by a satellite positioning system (GNSS). The ECS 2 may be an ECDIS (Electronic Chart Display and Information System). - The ECS 2 displays own ship and other ships on the electronic chart, as well as various information and user interface for the ship's navigator to set the ship's planned route. The
ECS 2 also issues an entering notification to thesteering device 4 indicating that the ship has entered a predetermined area. Theroute control device 3 performs navigation control to control the ship's position to follow the planned route set in theECS 2, and heading control to control the ship's heading to follow the reference heading, and outputs the reference heading to the steering device. - The
steering device 4 includes amode setting unit 41 whose steering mode is set to either a first or second steering mode by the mode setting process described below, and a rudderangle control unit 42 that controls thedriving device 12, that drives thegate rudder 11, so that the ship's heading follows the reference heading in the steering mode set by themode setting unit 41. - The configuration of the gate rudder is described below.
Figs. 2 and 3 show a schematic plan view and a schematic rear view, respectively, of the gate rudder configuration. - As shown in
Figs. 2 and 3 , thegate rudder 11 has tworudder plates propeller 14 from the lateral directions, i.e., perpendicular to the direction of the ship's propulsion and vertical direction, and tworudder shafts rudder plates rudder plates rudder shafts - In this embodiment, the rudder plates 110 are substantially plate-shaped members installed substantially vertically. The rudder shafts 111 are installed at positions relatively offset inwardly in the lateral direction from the positions of the corresponding rudder plates 110, with the shaft's axes oriented substantially vertical, and the orientation of the rudder plates 110 are adjusted by the rotation of the corresponding rudder shafts driven by the
driving device 12. - The mode setting process is described below.
Fig. 4 is a flowchart showing the operation of the steering mode setting process.Figs. 5 and 6 are schematic plan views showing the gate rudder when steered, respectively, into starboard and port directions in the first steering mode.Figs. 7, 8 and9 are schematic plan views showing the gate rudder when steered, respectively, in the straight ahead, starboard, and port directions in the second steering mode. - As shown in
Fig. 4 , first, themode setting unit 41 of thesteering device 4 calculates the rate of turn (S101) based on the headings of the ship detected by thesensors 13 during a duration of time immediately after the true rudder angle has matched the rudder angle order by the rudderangle control unit 42, and determines whether the calculated rate of turn is less than a preset threshold value (S102). - If the rate of turn is not less than the threshold value (S102, NO), the
mode setting unit 41 determines whether or not an entering notification has been issued by the ECS 2 (S103). The entering notification is issued when the ship is located within a predetermined area on the electronic chart displayed by theECS 2, for example, areas within a certain distance from a wharf, mooring buoy, planned offshore anchorage point, offshore structure, etc. - If no entering notifications are issued (S103, NO), the
mode setting unit 41 sets the steering mode of the rudderangle control unit 42 to the first steering mode (S104). When set to the first steering mode, the rudderangle control unit 42 controls the rudder angle of thegate rudder 11 in such a way that the two rudder plates 110 are kept parallel to each other, as shown inFigs. 2 ,5, and 6 . The rudderangle control unit 42 may also control the rudder angles of thegate rudder 11 to keep the rear sides of the two rudder plates 110 inclined outward in the lateral direction. - On the other hand, if an entering notification is issued (S103, YES), the
mode setting unit 41 sets the steering mode of the rudderangle control unit 42 to the second steering mode (S105). The rudderangle control unit 42 set to the second steering mode controls the rudder angle of thegate rudder 11 to keep the rear sides of the two rudder plates 110 inclined inward in the lateral direction, as shown inFigs. 7, 8 and9 . - If the rate of turn is less than the threshold value in step S102 (S102, YES), the
mode setting unit 41 sets the steering mode of the rudderangle control unit 42 to the second steering mode (S105). - Thus, by switching between the first steering mode, which prioritizes fuel efficiency, and the second steering mode, which prioritizes rudder effectiveness compared to the first steering mode, the
gate rudder 11 can be steered appropriately for the navigational situation. While, in the description above, the first steering mode is a steering mode in which the rudder is steered with the rudder plates held parallel or inclined outward, and the second steering mode is a steering mode in which the rudder is steered with the rudder plates held inclined inward, the second steering mode may be a steering mode in which the rudder is steered with rear edges of the two rudder plates 110 kept closer to each other than in the first steering mode. While the present embodiment is described for a ship equipped with apropeller 14, the ship may alternatively be a one equipped with other propulsion devices, for example, a water jet propulsion system, etc. - <Second embodiment>
- In the first embodiment, the steering mode is switched based on the rate of turn; however, in this embodiment, the steering system differs from that of the first embodiment in that the steering mode is switched based on the speed-through-water instead of the rate of turn.
Fig. 10 is a flowchart showing the operation of the steering mode setting process for this embodiment. - The
steering system 1 of this embodiment differs from that of the first embodiment in that thesensors 13 include a speed log that detects a speed-through-water of thehull 10, and thesteering device 4 receives the speed-through-water detected by thesensors 13. - First, as shown in
Fig. 10 , themode setting unit 41 of thesteering device 4 determines whether or not the speed-through-water detected by thesensors 13 is less than or equal to a predetermined threshold value (S201). The threshold value is set based on the pre-confirmed rudder effectiveness against speed-through-water. The correlation between the speed-through-water and rudder effectiveness is established based on, for example, simulations using ship motion models, measurements from water tank experiments, and measurements from test sailing of real ships. - If the speed-through-water is not less than the threshold value (S201, NO), the
mode setting unit 41 sets the steering mode of the rudderangle control unit 42 to the first steering mode (S202). - On the other hand, if the speed-through-water is less than or equal to the threshold value (S201, YES), the
mode setting unit 41 sets the steering mode of the rudderangle control unit 42 to the second steering mode (S203). - Thus, the calculation of the rate of turn may be spared and the amount of calculation involved in setting the steering mode may be reduced by setting the steering mode based on the evaluation of speed-through-water against a threshold value, wherein the threshold value is set based on the rudder effectiveness or, in other words, the correlation between the rate of turn and the speed-through-water. In addition, the use of the speed-through-water allows a switching of the steering mode that takes account of the effects on the
hull 10 from wind directions, wind speeds, and direction and speed of currents. - The embodiment of the present invention has been presented by way of example only, and is not intended to limit the scope of the invention. The novel embodiment described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes may be made without departing from the spirit of the invention. The embodiment and modifications are included in the scope or spirit of the present invention and in the appended claims and their equivalents.
-
- 4 Steering device
- 11 Gate rudder
- 41 Mode setting unit
- 42 Rudder angle control unit
Claims (4)
- A steering device for controlling a rudder comprising two rudder plates disposed so as to flank a propulsion device from lateral directions, comprising:a mode setting unit that sets a steering mode to eithera first steering mode wherein the rudder is steered with the two rudder plates kept substantially parallel to each other, ora second steering mode wherein the rudder is steered with rear edges of the two rudder plates kept closer to each other than in the first steering mode; anda rudder angle control unit that controls angles of the two rudder plates
according to the steering mode set by the mode setting unit. - The steering device according to claim 1,
wherein the mode setting unit sets the steering mode to the second steering
mode when a rate of turn of a ship on which the rudder is disposed is below a predetermined threshold value. - The steering device according to claim 1,
wherein the mode setting unit sets the steering mode to the second steering
mode when a speed-through-water of a ship on which the rudder is disposed is below a predetermined threshold value. - The steering device according to either one of claims 1 - 3,
wherein the mode setting unit sets the steering mode to the second steering
mode when a position of a ship on which the rudder is disposed is within a predetermined area set on an electronic chart.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020034917 | 2020-03-02 | ||
PCT/JP2021/007639 WO2021177213A1 (en) | 2020-03-02 | 2021-03-01 | Steering device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4116186A1 true EP4116186A1 (en) | 2023-01-11 |
EP4116186A4 EP4116186A4 (en) | 2023-08-30 |
Family
ID=77613386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21765320.3A Withdrawn EP4116186A4 (en) | 2020-03-02 | 2021-03-01 | Steering device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4116186A4 (en) |
JP (1) | JPWO2021177213A1 (en) |
WO (1) | WO2021177213A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO160840C (en) * | 1986-11-20 | 1989-06-07 | Mariko As | BAATER OPERATING DEVICE. |
JP2008230379A (en) * | 2007-03-20 | 2008-10-02 | Universal Shipbuilding Corp | Method and device for steering uniaxial two-rudder vessel |
JP6160804B2 (en) * | 2012-10-05 | 2017-07-12 | 国立研究開発法人 海上・港湾・航空技術研究所 | Two-rudder system and ship equipped with two-rudder system |
PL3103715T3 (en) | 2014-01-31 | 2020-08-24 | Kay Seven Co. Ltd. | Steering device, and steering method therefor |
JP6467152B2 (en) * | 2014-07-09 | 2019-02-06 | 株式会社ケイセブン | Steering device |
JP6515171B1 (en) * | 2017-12-18 | 2019-05-15 | 株式会社ケイセブン | Steering device and ship |
JP6659747B2 (en) * | 2018-02-20 | 2020-03-04 | 株式会社ケイセブン | Steering gear |
JP6860642B1 (en) * | 2019-11-26 | 2021-04-21 | 株式会社ケイセブン | Steering device |
-
2021
- 2021-03-01 WO PCT/JP2021/007639 patent/WO2021177213A1/en unknown
- 2021-03-01 EP EP21765320.3A patent/EP4116186A4/en not_active Withdrawn
- 2021-03-01 JP JP2022504344A patent/JPWO2021177213A1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021177213A1 (en) | 2021-09-10 |
EP4116186A4 (en) | 2023-08-30 |
JPWO2021177213A1 (en) | 2021-09-10 |
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