Results 261 to 270 of about 33,961 (285)

Thruster assisted position mooring based on structural reliability

International Journal of Control, 2008
This paper addresses dynamic positioning of surface vessels moored to the seabed via a spread mooring system, referred to as position mooring. In normal weather conditions, the mooring system constrains the vessel and the controller applies thruster force for motion damping and heading control, only.
P.I. Barth Berntsen, O.M. Aamo, B.J. Leira   +2 more
openaire   +1 more source

A Study on Position Mooring System Design for Barge Ship Moored by Cables

Modelling, Identification and Control, 2014
This paper presents some experimental results about Position Mooring (PM) system applied to the barge ship. In PM operation, the station keeping in surge, sway of vessel is provided by the mooring system. In this paper, a system consisting of a barge vessel and mooring lines is mathematically modeled.
Sang-Jin Kim, Sang-Won Ji, Young-Bok Kim
openaire   +1 more source

Augmentation of a Mooring System Through Dynamic Positioning

Offshore Technology Conference, 1974
ABSTRACT A dynamic-positioning (DP) system can be designed to stabilize and damp the motions of a vessel when moored as well as unmoored. The vessel motion dynamic characteristics are generally significantly different when the vessel is moored as opposed to unmoored and may Vary over a wide range with changes in ...
J.S. Sargent, M.J. Morgan
openaire   +1 more source

Optimal Set-Point Chasing of Position Moored Vessel

29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 4, 2010
Dynamic positioning of surface vessels moored to the seabed via a spread mooring system are referred to as position mooring (PM), the main objective of which is to keep the vessel within a small radius from a given position while preventing mooring line breakage.
Shaoji Fang, Mogens Blanke, Bernt J. Leira   +2 more
openaire   +1 more source

Robust Adaptive Position Mooring Control for Marine Vessels

IEEE Transactions on Control Systems Technology, 2013
In this paper, robust adaptive control with dynamic control allocation is proposed for the positioning of marine vessels equipped with a thruster assisted mooring system, in the presence of parametric uncertainties, unknown disturbances and input nonlinearities.
Chen, M., Ge, S.S., How, B.V.E., Choo, Y.S.   +3 more
openaire   +1 more source

Thruster assisted position mooring system for turret-anchored FPSOs

Proceedings of the 1999 IEEE International Conference on Control Applications (Cat. No.99CH36328), 2003
A thruster assisted position mooring system includes different control functions for station keeping and motions damping of the horizontal-plane motions. A new nonlinear passivity-based state observer producing the thruster control actions has been implemented and verified in full-scale tests.
A.J. Sorensen, J.P. Strand, T.I. Fossen
openaire   +1 more source

Control of marine riser end angles by position mooring

Control Engineering Practice, 2010
Abstract For safe drilling and work-over operations on floating platform, one objective is to minimize the rigid riser angles at the well-head and at the top joint. One way to achieve this is to control the vessel’s position. For shallow water, drilling operations are normally carried out using a moored vessel. In this paper, a system consisting of a
Dat H. Nguyen, Dong T. Nguyen, Ser T. Quek, Asgeir J. Sørensen   +3 more
openaire   +1 more source

Dynamic Positioning of Moored Vessels Based on Structural Reliability

Proceedings of the 45th IEEE Conference on Decision and Control, 2006
This paper addresses dynamic positioning of surface vessels moored to the seabed via a spread mooring system, referred to as position mooring. In normal weather conditions, the mooring system constrains the vessel and the controller applies thruster force for motion damping and heading control, only.
Per Ivar Barth Berntsen, Ole Morten Aamo, Bernt J. Leira   +2 more
openaire   +1 more source

Position mooring control based on a structural reliability criterion

Structural Safety, 2013
Abstract To prevent failure of mooring lines in modern position mooring (PM) systems, position moored vessels are kept within a small distance from a desired reference position. A safe position within such region is where stress in all mooring lines are kept well below tensile strength. To prevent several mooring lines simultaneously from exceeding a
Shaoji Fang, Bernt J. Leira, Mogens Blanke   +2 more
openaire   +1 more source

Research on modeling and control of thruster-assisted position mooring system for deepwater turret-moored FPSO

Proceedings of the 33rd Chinese Control Conference, 2014
It addresses dynamic positioning technology of deepwater FPSO moored to the seabed via a turret based spread mooring system, referred to as Position Mooring (PM). In normal weather conditions, the mooring system constrains the FPSO to the predefined region.
Yuan Hui Wang, Xiang Hui Dou, Chun Tai Zou, Yu Long Tuo, Yan Wen Liu   +4 more
openaire   +1 more source