Searched for: subject%3A%22dynamic%255C+positioning%22
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Bziker, Farah (author)
Traditionally, the control point (CP) of a dynamically positioned vessel is located around its center of gravity (CoG). However, during offshore operations, other locations, such as the crane tip or gripper position, become more critical due to the load being located there. This thesis proposes shifting the control point from the CoG to an...
master thesis 2023
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de Boer, Jens (author)
A significant decrease in greenhouse gas emissions can be achieved by including a prediction of future power consumption in the control of ships’ power plants during transits. Moreover, including a prediction of power consumption in the Energy Management System (EMS) during Dynamic Positioning (DP) operations can also contribute to a reduction...
master thesis 2023
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Mauro, F. (author), Valentina, Enrico Della (author), Ferrari, Victor (author), Begovic, Ermina (author)
The increasing demand for offshore operations in deep water implies the necessity to predict station-keeping ability of offshore vessels since the early stages of design. To this end, besides developing sufficiently fast and accurate methodologies for the equilibrium resolution of the forces acting on the ship, it is of utmost importance to...
journal article 2023
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Mauro, F. (author), Nabergoj, Radoslav (author)
Determining Dynamic Positioning capability for an offshore vessel is mandatory to identify the environmental forces the system can counteract, together with the operability in a specific operational area of interest. Conventional predictions evaluate the capability as a maximum sustainable wind speed at a predefined encounter angle for a given...
journal article 2022
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Ardavanis, Kimon (author), Nabergoj, Radoslav (author), Mauro, F. (author)
Installation of jacket platforms requires simultaneous and combined operations of multiple assets. When the whole process has to be planned, it is necessary to predict in a fast and reliable way the possible weather limitations that may occur during the operations. The paper will present the major challenges of this unusual and innovative...
journal article 2022
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Quast, Arnout (author)
In offshore operations a trend is forming where vessels are more often required to do multiple short operations within a small-time frame. Traditional mooring systems require execution time far beyond the operation time. Dynamic positioning systems offer great advantages for short time span operations such as crew transfer or lift operations. ...
master thesis 2021
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Ye, J. (author), Roy, S. (author), Godjevac, Milinko (author), Baldi, S. (author)
Position control for heavy-lift construction vessels is crucial for safe operation during offshore construction. During the various phases of a typical offshore construction assignment, considerable changes in the dynamics of the crane-vessel system occur. Operational hazard was reported if such interchanging dynamics are not properly handled...
journal article 2021
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Boll, Lars Christian (author)
During offshore construction with a Semi-Submersible Crane Vessel (SSCV) the vessel is station keeping by means of Dynamic Positioning (DP). DP enables a vessel to keep position and heading by utilizing its own propulsion, while being exposed to the environmental forces caused by waves, wind and current. In a comparison study between offshore...
master thesis 2020
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De Wet, Pieter (author)
Offshore operations are increasingly executed by vessels operating on dynamic positioning (DP) due to advantages it has for short operations, such as maintenance and crew transfer but also for track keeping operations and projects in deeper water. Currently, DP capability plots are used to indicate whether an operation can be performed, but this...
master thesis 2019
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Ye, J. (author), Roy, S. (author), Godjevac, M. (author), Baldi, S. (author)
With the growing demand of large-scale heavy lift vessels in the deep-sea offshore construction works, high performance of Dynamic positioning (DP) systems is becoming ever crucial. However, current DP systems on board of heavy lift vessels do not consider model uncertainty (typically arising from mooring forces). In this paper, an observer...
journal article 2019
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Wittingen, Martijn (author)
After years of using fossil fuel, the transition to renewable energy sources need to be made to limit the increase in temperature and to support the future energy demand. To support and speed up the transition phase from fossil fuels to renewables it is necessary to decrease the costs. Offshore Wind Turbines are widely used for the production of...
master thesis 2018
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Spruijt, Pieter (author)
To reduce global warming and air pollution, the maritime industry is searching for solutions to reduce fuel consumption. This thesis focuses on the reduction of generator running hours and fuel consumption of Dynamically Positioned (DP) vessels. In this ship type, redundancy of the power generation system is regularly achieved by running on one...
master thesis 2018
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de Jong, Ruben (author)
A conventional dynamic positioning system is used to control vessel motions in the horizontal plane, i.e. surge, sway and yaw. However, the safety and operability of several offshore operations can be increased when also the roll motion is actively controlled, especially in beam seas. A control system model is proposed for combined thruster...
master thesis 2018
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Schouten, Ewout (author)
In this thesis the differences between the monohull and semi-submersible are investigated. For a general heavy lift crane operation and its operational profile, the difference is performance and total cost are calculated. These are used to determine the turning point, the point where the semi-submersible is more favourable for a heavy lift crane...
master thesis 2018
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van 't Klooster, Steven (author)
Currently there are three methods of calculating the Dynamic Positioning capability of a vessel namely: static calculations, real-time time domain simulations and fast-time time domain simulations, although the outcome of the last two should be identical. In each of these methods a set of input variables is required to perform the calculations....
master thesis 2018
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Charalambous, Chris (author)
The rapid rate in technological advancements leaves little to none options for our environment to react. The excessive use of "conventional" energy is bringing planet Earth to its knees. However, people started recognizing the value of renewable energy sources.<br/>One of the major renewable sources is the wind energy. The wind energy can be...
master thesis 2017
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Van der Vossen, I.M. (author)
The starting point of this research is to asses possible shortcomings of the combined operation of a Dynamic Positioning (DP) vessel and a motion compensation system, with respect to the amount of energy that is used. The motion compensation system is used to allow a safe transfer from the vessel to a static offshore structure. Both systems have...
master thesis 2017
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Oomen, F.H.A. (author)
Deepwater drillships are nowadays capable of drilling to oil in water depths up to 4000m and reservoirs at 12000 m depth and greater. Active Heave Compensation at these large drilling depths and station keeping with the Dynamic Positioning system leads to large fluctuations in the electrical power system. The electrical power is now directly...
master thesis 2016
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Malikouti, C. (author)
The present study investigates the implementation of energy storage devices on board a vessel which functions in dynamic positioning mode at some part of its operational profile. For the purpose of deriving quantifiable results the paradigm of a platform supply vessel is utilized. In order to conduct this analysis there were four steps that were...
master thesis 2016
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Ye, J. (author)
Dynamic positioning has been developed for over half a century and is now widely used on board. However, the existing dynamic positioning system is not specially made with heavy lift vessels. This report is to solve the dynamic positioning problem during heavy lift operations. To fulfill this goal, the robustness and stability of the solutions...
master thesis 2016
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