1989 Fiscal Year Final Research Report Summary
Control on the motion of a cable ship
| Project/Area Number |
63460148
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
船舶抵抗・運動性能・計画
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| Research Institution | Kyushu University |
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Principal Investigator |
KIJIMA Katsuro Kyushu University, Faculty of Engineering, Professor, 工学部, 教授 (90038042)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Susumu Kyushu University, Faculty of Engineering, Research assistant, 工学部, 助手 (10207102)
SHINKAI Akiji Kyushu University, Faculty of Engineering, Assistant professor, 工学部, 助教授 (10112301)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Ship control / Ship motion / Towing / Cable ship / Automatic track-keeping control / Optimal regulator theory / Optical fiber cable / Course stability |
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| Research Abstract |
A cable ship is required to have the ability to maneuver for precise track-keeping for laying the submarine cable. Especially, she has to work with the utmost care for laying an optical fiber cable be in great demand recently: This research deals with an automatic track-keeping control system of a cable ship during laying and burying of the submarine cable by means of a plow burying machine under external disturbances such as wind and current, developed by the optimal regulator theory. In order to find the effective and practical parameters for track-keeping control, the course stability analysis is examined. Furthermore the maneuvering characteristics of a cable ship are discussed by simulation study on the view point of track-keeping control.
The major concluding remarks can be summarized as follows.
(1)It will be very useful to pick not only the heading angle but also the towing angle up towards the practical design for an automatic track-keeping control system of a cable ship.
(2)A cable ship will be stable as the soil of sea bed becoming hard, and also will become stable as increasing depth of water, that is, as increasing length of tow line of a plow.
(3)But under external disturbances such as wind and current, as soil of sea bed becoming hard, it will be becoming difficult to control a cable ship, because the course stability of a cable ship will be affected by the disturbances as decreasing ship speed.
(4)The algorithm of an optimal regulator theory will be effective for track-keeping of a cable ship.
These approach will be useful for the design of automatic track-keeping control system of a cable ship.
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