Blar i Institutt for marin teknikk på tittel
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Study on the static behavior of installing a deep-water drilling riser on a production platform
(Peer reviewed; Journal article, 2020)Riser interference caused by wake effects between adjacent risers severely threatens the safety during riser installation process on a Dry-Tree Tension Leg Platform (TLP) system. Due to the ignorance of interference effect, ... -
Submerged Towing and Upending of TLP Thethers - Numerical Simulations and Assessment of Operational Limits
(Master thesis, 2016)In the event of transport, installation and operation of subsea oil and gas factories, marine operations are often a huge part of the total capital expenditure. As a result of this, oil and gas companies are looking for ... -
Subsea Cable Tracking using Sensor Fusion on an Autonomous Underwater Vehicle
(Master thesis, 2017)Surveys of underwater power cables by Remotely Operated Vehicles (ROVs) are time demanding and expensive. We want to examine the possibility of using an Autonomous Underwater Vehicle (AUV) with magnetometers for estimating ... -
Subsea Hydraulic Leakage Detection and Diagnosis
(Master thesis, 2010)The motivation for this thesis is reduction of hydraulic emissions, minimizing of process emergency shutdowns, exploitation of intervention capacity, and reduction of costs. Today, monitoring of hydraulic leakages is scarce ... -
Subsurface towing of a subsea module
(Master thesis, 2010)This thesis serves as a preparatory study for a new concept in subsurface towing proposed by Acergy Norway. 3 different mathematical methods for determining the most important dynamics occurring during a subsurface towing ... -
Subsurface towing of heavy module
(Master thesis, 2011)The offshore industry is expanding, new contracts are offered all over the world and new oil fields are discovered deeper and further offshore. With this expansion follows great business opportunities for existing and new ... -
Sufficient conditions for uniform asymptotic stability and input-to-state stability using high-order control barrier functions
(Peer reviewed; Journal article, 2023)Control barrier functions (CBFs) ensure safety of controlled dynamical systems by enforcing forward invariance of safe subsets of the state space. First-order CBFs are applicable for systems where the control input appears ... -
Sulphur Abatement Globally in Maritime Shipping
(Journal article; Peer reviewed, 2017)In 2016, the International Maritime Organization (IMO) decided on global regulations to reduce sulphur emissions to air from maritime shipping starting 2020. The regulation implies that ships can continue to use residual ... -
Supervised Dynamic Probabilistic Risk Assessment of Complex Systems, Part 1: General Overview
(Peer reviewed; Journal article, 2021)Dynamic probabilistic risk assessment (DPRA) is a systematic and comprehensive methodology that has been used and refined over the past decades to evaluate risks associated with complex systems. However, current approaches ... -
Supervised dynamic probabilistic risk assessment of complex systems, part 2: Application to risk-informed decision making, practice and results
(Peer reviewed; Journal article, 2021)One challenge that has received attention in maritime industry is assessing the risk level of dynamic positioning (DP) systems in emergency situations. Statistics from recent years have shown that the risk level of some ... -
Supervised dynamic probabilistic risk assessment: Review and comparison of methods
(Peer reviewed; Journal article, 2022)With the adoption of autonomous systems in higher levels of autonomy, large-scale, complex and dynamic systems are becoming commonplace. Ensuring safe operation of safety-critical autonomous systems is paramount, typically ... -
Supervisory Control of Line Breakage for Thruster-Assisted Position Mooring System
(Chapter, 2015)Thruster-assisted position mooring (TAPM) is an energy-efficient and reliable stationkeeping method for deep water structures. Mooring line breakage can significantly influence the control system, and ultimately reduce ... -
Supervisory Risk Control of Autonomous Surface Ships
(Journal article; Peer reviewed, 2022)The objective of this paper is to develop online risk models that can be updated as conditions change, using risk as one metric to control an autonomous ship in operation. This paper extends and integrates the System ... -
Supervisory-switched Control for Dynamic Positioning Systems in Arctic Areas
(Master thesis, 2010)Dynamically positioned vessels may experience rapidly changing environmental loads if the vessels are operating in ice-covered waters. The transition between open water to level ice is an abrupt change from no ice loads ... -
Supplementing remote sensing of ice: Deep learning-based image segmentation system for automatic detection and localization of sea ice formations from close-range optical images
(Peer reviewed; Journal article, 2021)This paper presents a three-stage approach for the automated analysis of close-range optical images containing ice objects. The proposed system is based on an ensemble of deep learning models and conditional random field ... -
Supply Chain Design under Uncertainty: Locating LNG distribution centers in an emerging market with uncertain demand
(Master thesis, 2014)According to the International Energy Agency, the global use of natural gas will increase dramatically in the next two to three decades. Due to factors ranging from national and international energy market regulations to ... -
Supply chain development and optimal location of reception points for shipboard carbon capture
(Master thesis, 2022)Den internasjonale sjøfartsorganisasjonen (IMO) har definert obligatoriske tiltak for å redusere klimagass-utslipp fra internasjonal skipsfart, som står for 3% av verdens utslipp. Flertallet av fartøy i drift i dag, samt ... -
Surface Effect Ship with Four Air Cushions Part II: Roll and Pitch Damping
(Peer reviewed; Journal article, 2019)This paper introduce damping of roll and pitch motion on a Surface Effect Ship (SES) in low vessel speeds. The SES consist of two side-hulls, a reinforced rubber bow and stern seal skirt system and four air cushion. The ... -
A survey on modeling and control of thruster-assisted position mooring systems
(Peer reviewed; Journal article, 2020)This review presents a systematic summary of the state-of-the-art development of technological solutions, modeling, and control strategies of thruster-assisted position mooring (TAPM) systems. The survey serves as a starting ... -
Survey report for CRIMAC SFI 2023
(Toktrapport;, Research report, 2024)This cruise report describes the objectives, methods, and preliminary results from the tasks carried out at the CRIMAC SFI survey. The survey was conducted on board RV G.O. Sars between November 15th (Tromsø) and November ...