Browsing Institutt for marin teknikk by Title
Now showing items 2751-2770 of 3410
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Robust Dynamic Positioning of offshore vessels using mixed-μ synthesis modeling, design, and practice
(Journal article, 2017)This paper describes a procedure to design robust controllers for Dynamic Positioning (DP) of ships and offshore rigs subjected to the influence of sea waves, currents, and wind loads using H∞ and mixed-μ techniques. The ... -
Robust hybrid retningsstyring for autonome skip
(Master thesis, 2019)I de senere år har det vært økt interesse for styringssystemdesign og veiledning av autonome fartøy. Etter hvert som kompleksiteten i disse systemene øker, er det stor etterspørsel etter å designe robuste systemer som ... -
Roll Damping Investigation of Two-Dimensional Ship Section with Bilge-Boxes
(Master thesis, 2017)Roll motion is considered as one of the most difficult responses to be mathematically treated, this is due to the importance of the viscous effects. Several parameters may affect the roll motion hydrodynamically. Hence, ... -
Roll damping of a surface effect ship with split air cushion
(Journal article; Peer reviewed, 2018)This paper considers linear modeling of a surface effect ship (SES) where roll motions are damped by exclusively exploiting a longitudinally split air cushion design. On a SES, the pressurized air cushions can support up ... -
Roll-yaw coupling effects on parametric resonance for a ship in regular waves
(Chapter, 2014)This work represents a further step of the physical study documented by Greco and Lugni (2012b) and Greco et al. (2014). Three-dimensional experiments have been performed on a FPSO model in regular waves to investigate the ... -
Root causes of hydrocarbon leaks on offshore petroleum installations
(Journal article; Peer reviewed, 2015)Hydrocarbon leaks on offshore installations may result in severe consequences to personnel, to the environment and to assets. In order to prevent such leaks, it is crucial to understand their root causes. The objective of ... -
Rotor imbalance detection and diagnosis in floating wind turbines by means of drivetrain condition monitoring
(Peer reviewed; Journal article, 2023)This paper presents a novel approach for detection and diagnosis of the rotor imbalance types pitch misalignment, yaw misalignment and mass imbalance by monitoring the drivetrain vibration response. Traditionally, only ... -
Rotor‐integrated modeling of wind turbine aerodynamics
(Peer reviewed; Journal article, 2021)A novel approach for the modeling of rotor-integrated aerodynamic loads is suggested to answer the need for a comprehensive, insightful, and analytical actuator disc model. All the six degrees of freedom (including tangential ... -
Route modelling in coastal navigation for digital twins and digital platforms
(Master thesis, 2020)Denne oppgaven undersøker hvordan digital tvilling teknologi kan brukes til å ta smartere beslutninger og operere mer effektivt i kystnavigering. Forskningsspørsmålene for denne oppgaven er: (1) Hva er begrensende faktorer ... -
ROV Control System for Positioning of Subsea Modules
(Master thesis, 2014)Installation of deep water Xmas trees for subsea oil production is sometimes done by lowering the tree using one wire. Xmas trees are interfacing with other equip- ment on the seafloor and will therefore need to be positioned, ... -
ROV Motion Control Systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:295, Doctoral thesis, 2014)This thesis is about automatic motion control systems for remotely operated vehicles (ROV). The work has focused on topics within guidance and navigation. In addition, a motion control system has been developed, implemented, ... -
Safe and efficient operation and maintenance of offshore wind farms
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:70, Doctoral thesis, 2014)This PhD work has been carried out when early experience is obtained from the first offshore wind energy projects and new projects with large capacity are in preparation. The importance and challenges of operation and ... -
Safe Autonomy in Marine Robotics
(Doctoral theses at NTNU;2024:44, Doctoral thesis, 2024)The use of marine robots has become increasingly common in various disciplines and industries, such as oceanography, marine biology, archaeology, transportation, offshore energy, fisheries, and security. However, the marine ... -
Safety and efficiency enhancement of anchor handling operations with particular emphasis on the stability of anchor handling vessels
(Doctoral theses at NTNU;2017:209, Doctoral thesis, 2017)The overall objective of this thesis is the development of a framework for enhancing the safety and efficiency of anchor handling vessels (AHVs) during anchor handling operations (AHOs). In other words, the proposed ... -
Safety and Verification of Advanced Maritime Vessels - An Approach Based on Systems Theory
(Doctoral theses at NTNU;2018:119, Doctoral thesis, 2018)The past few decades have seen rapid technological development in ships and offshore vessels. Advanced electrical power plants and dynamic positioning (DP) systems are now widespread, and the growing demand for greener and ... -
Safety climate as an indicator for major accident risk: Can we use safety climate as an indicator on the plant level?
(Journal article, 2016)Measuring safety climate is regarded a proactive approach to safety management. With increased focus on developing indicators for major accidents, there is a need to critically assess the effectiveness of current practices ... -
Safety in Exposed Aquaculture Operations Strategies and methods for reducing risk
(Doctoral theses at NTNU;2022:73, Doctoral thesis, 2022)Norway is the largest producer and exporter of farmed Atlantic salmon and rainbow trout worldwide. The national ripple effects of the fishing industry are significant. New concepts are being developed and tested for fish ... -
Safety in Norwegian Fish Farming - Concepts and methods for improvement
(Doctoral theses at NTNU;2019:75, Doctoral thesis, 2019) -
Safety in Offshore Platforms - Use of QRA in the Norwegian Offshore Industry
(Chapter, 2018)The chapter is concerned with the development and status of Quantitative Risk Assessment (QRA) in the Norwegian offshore industry. The chapter outlines the background to the use of QRA and how the regulations have developed ... -
SAFETY IN THE NORWEGIAN FISHING FLEET - ANALYSIS AND MEASURES FOR IMPROVEMENT
(Doctoral theses at NTNU;2016:278, Doctoral thesis, 2016)The work of this thesis attempted to undertake the task of establishing knowledge of the level of safety within the Norwegian fishing fleet, with the objective to both understand previous occurrences and exploit succinct ...