Results 71 to 80 of about 149 (107)

Robust adaptive control of a thruster assisted position mooring system

Automatica, 2014
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Shuzhi Sam Ge, Shuang Zhang, Wei He
exaly   +2 more sources

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
Bernt Leira, Mogens Blanke
exaly   +2 more sources

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
Asgeir J Sørensen, Dong Trong Nguyen
exaly   +2 more sources

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
exaly   +2 more sources

Position and Nearshore Mooring

Springer Series on Naval Architecture, Marine Engineering, Shipbuilding and Shipping
Alexander Arnfinn Olsen
exaly   +2 more sources

Dynamic mooring-forces allocation in dynamic ship positioning

Journal of Optimization Theory and Applications, 1989
The design of a dynamic positioning system for a multiply-moored vessel with active winches and thrusters is presented. The proposed positioning system is based on Kalman filter and linear optimal control. Its peculiarity is that it contains a scheme which allocates dynamically the control forces between moorings and thrusters.
AMBROSINO, GIUSEPPE, GAROFALO, FRANCESCO, L. Glielmo   +2 more
openaire   +3 more sources

Dynamic Positioning in Single-Point Moorings

All Days, 1983
ABSTRACT This paper deals with the concept of and a system for complete control of the slowly varying bow motion of a bow-moored ship using dynamic positioning. System performance is shown by simulated case studies with an offshore 1oading tanker.
Hans Roar Sørheim, Steinar Roar Gregersen, N.A. Jenssen   +2 more
openaire   +1 more source

The Application of Dynamic Positioning for Moored Tankers

Offshore Technology Conference, 1987
ABSTRACT The hawser tension in a mooring system is classically decomposed into three components: mean, lowfrequency and wave-frequency. The low-frequency component is often the most significant contribution. This component is produced by relatively small second-order wave forces whose frequency coincides with the ...
O.Y. Bonnet, S. Gregersen, P.B. Branchereau   +2 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

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