期刊
OCEAN ENGINEERING
卷 31, 期 1, 页码 97-110出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0029-8018(03)00016-7
关键词
effective optimum control; sequential quadratic method; thruster system; rotary azimuth thruster
An offshore vessel with a dynamic positioning system (DP system) needs fast response to produce thrust to counteract the environmental forces acting on it for the purpose of maintaining its position and heading as close as possible to the working position. Therefore, quick and effective modulation of the thrust is the problem to determine the thrust and the rotation angle of the thruster devices of the ship. This paper presents an effective optimum control for a thruster system, using the sequential quadratic method to achieve economical and effective modulation of the thrust and the direction of the thruster. An optimum control study of a 2280 tons DP coring vessel with five rotary azimuth thruster marine positioning is studied in detail, which can quickly and exactly estimate the thrusts and angles of direction of all the thrusters. The results can provide a valuable thruster system for a dynamically positioned vessel. (C) 2003 Elsevier Ltd. All rights reserved.
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