Blar i Institutt for marin teknikk på tittel
Viser treff 2741-2760 av 3410
-
Risk-Based Control of Autonomous Surface Ship
(Doctoral theses at NTNU;2024:174, Doctoral thesis, 2024)The last few decades have seen tremendous technological development in the maritime industry. Improvements in navigation systems such as Global Navigation Satellite Systems have reduced measurement error and uncertainty ... -
Risk-based decision-making support model for offshore dynamic positioning operations
(Journal article; Peer reviewed, 2021)A Dynamic Positioning (DP) system enables vessels and rigs to accurately maintain a predetermined position and heading or track. It enables precise operations under harsh environmental conditions. DP is used for a variety ... -
Risk-Based Design Methodology for an Ice-Classed Multipurpose OSV
(Master thesis, 2013)According to US Geology Survey of 2009, 30 % of the world s undiscovered gas and 13% of the world s undiscovered oil may be located in the Arctic area. Due to a high demand for energy resources and a reduction trend in the ... -
Risk-Based Stability Assessment for Semi-Submersible Platforms: Ballast System Failure
(Master thesis, 2013)Stability and buoyancy loss is a very current problem for semi-submersible platforms. New ballast system designs are developed to improve the safety of personnel and facility, but the effect of these is difficult to measure ... -
Risk-based supervisory control for autonomous ship navigation
(Peer reviewed; Journal article, 2023)This paper proposes a novel method to transform the results of qualitative risk analysis into a numeric optimal control problem for autonomous ship navigation. Today, making autonomous high-level decisions replacing a crew ... -
Risk-Influenced Path Planning based on Online Risk Analysis, Bayesian Networks and the A* Path Planning Algorithm
(Master thesis, 2019)Arbeidet presentert i denne masteroppgaven forsøker å bidra til kunnskapsgrunnlaget for autonome marine fartøy ved å tilby forslag til funksjonalitet i et autonomt fartøys kontrollarkitektur. Funksjonaliteten er basert på ... -
Risk-informed control systems for improved operational performance and decision-making
(Peer reviewed; Journal article, 2021)Autonomous systems, including airborne, land-based, marine, and underwater vehicles, are increasingly present in the world. One important aspect of autonomy is the capability to process information and to make independent ... -
Risk-related information needed through the planning process for offshore activities
(Journal article; Peer reviewed, 2018)Planning and plan quality influence safe and efficient execution of work in offshore oil and gas activities. An important basis for developing good plans and making good decisions during the planning process is to have the ... -
Robust and Reconfigurable On-Board Processing for a Hyperspectral Imaging Small Satellite
(Peer reviewed; Journal article, 2023)Hyperspectral imaging is a powerful remote sensing technology, but its use in space is limited by the large volume of data it produces, which leads to a downlink bottleneck. Therefore, most payloads to date have been ... -
A Robust Circuit and Controller ParametersIdentification Method of Grid-Connected VoltageSource Converters Using Vector Fitting Algorithm
(Peer reviewed; Journal article, 2021)This article presents a vector fitting (VF) algorithmbased robust circuit and controller parameters identification method for grid-connected voltage source converters (VSCs). The dq-domain impedance frequency responses ... -
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, ...