Institutt for marin teknikk: Nye registreringer
Viser treff 1-20 av 3421
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Hybrid and nonhybrid control barrier functions for constraint satisfaction in dynamical systems: Applied to safe motion control of autonomous vessels
(Doctoral theses at NTNU;2024:262, Doctoral thesis, 2024) -
Agile smallsat operation tool-chain development: Hypso-1 hyperspectral earth observation experiences
(Peer reviewed; Journal article, 2023)Satellite operations is important for a successful mission, but can be time consuming for inexperienced operators in new small satellite projects. We present a method for the continuous development of an earth observation ... -
Lessons learned from the trial operation of an autonomous urban passenger ferry
(Peer reviewed; Journal article, 2024)Cities worldwide consider autonomous passenger ferries a sustainable way of transporting passengers across and along waterways. Since 2016, a university-led effort to develop autonomous urban passenger ferry prototypes has ... -
Comparative analysis of rolling contact fatigue life in a wind turbine pitch bearing with different modeling approaches
(Journal article; Peer reviewed, 2024)The load calculation for wind turbines usually does not take pitch bearings into account, and the pitch-bearing internal load distribution is calculated in a decoupled process. In the current study, a coupled wind turbine ... -
Human factor influences on supervisory control of remotely operated and autonomous vessels
(Journal article; Peer reviewed, 2024)Autonomous ships require remote supervision from a human operator to ensure safety. However, there are knowledge gaps concerning human factor influences on remote supervisory control. We investigate the influence of five ... -
Feasibility of a green corridor serviced by a battery-powered cargo ship
(Master thesis, 2024)Internasjonal skipsfart er hovedbidragsyteren til transporterte varer, og står for transport av mer enn 80\% av de transporterte varene. Den internasjonale sjøfartsorganisasjonen (IMO) har satt en strategi for klimagassutslipp ... -
Development and testing of a risk-based control system for autonomous ships
(Journal article; Peer reviewed, 2023)This paper presents a method for designing and verifying a control system with risk-based decision-making capabilities to improve its intelligence and enhance the safe operation of autonomous systems. The decision-making ... -
Shipping Safety in the Arctic - Contributions to the understanding of shipping risk during escort and convoy operations
(Doctoral theses at NTNU;2024:200, Doctoral thesis, 2024)The decline in Arctic ice extent has drawn increasing attention to Arctic shipping. In comparison to traditional routes, Arctic routes offer substantial advantages, particularly in terms of time efficiency and cost ... -
Stability Assessment of a Semisubmersible Floating Offshore Wind Turbine
(Master thesis, 2024)Den økende etterspørselen etter fornybar energi har ledet til større interesse for utvikling av flytende havvindturbiner. Havvindparker tilbyr muligheten til å utnytte omfattende områder med stabil vind, noe som gjør dem ... -
Designing a marine systems design specialization track at NTNU
(Journal article; Peer reviewed, 2024)In this paper we describe and discuss the current and future MSc specialization programme in marine systems design at the Norwegian University for Science and Technology (NTNU). We follow the structure of a design process. ... -
Early Marine Systems' Design - Cracking the wicked problem - The case of a novel biomass harvesting vessel
(Journal article; Peer reviewed, 2024)Several IMDC contributions have argued for a better approach to capture stakeholders' expectations in vessel newbuilding projects' execution. The appropriate processes of requirements elucidation are, however, often forgotten ... -
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 ... -
Towards carbon-free mobility: The feasibility of hydrogen and ammonia as zero carbon fuels in spark ignition light-duty vehicles
(Peer reviewed; Journal article, 2024)Global warming is a major environmental issue caused by the release of greenhouse gases, such as carbon dioxide into the atmosphere. Light-duty vehicles (LDVs) including passenger cars and light-duty trucks, are a significant ... -
Experimental reproduction of inhomogeneous fjord waves
(Journal article; Peer reviewed, 2024)Waves in coastal areas and fjords can present inhomogeneities that affect the responses of very large floating structures. However, spatial inhomogeneities of waves are usually not included in model testing. In this paper, ... -
Numerical and experimental hydrodynamic study of a vertical circular floating dock in waves
(Doctoral theses at NTNU;2024:182, Doctoral thesis, 2024)A hydrodynamic analysis of a free-floating bottom-less upright circular dock in waves conceived for the installation of spar-type floating offshore wind turbines (FOWT) is carried out in this work for incident wave frequencies ... -
Simulating emergency response for large-scale fish welfare emergencies in sea-based salmon farming
(Journal article; Peer reviewed, 2022)This paper presents a simulation model for analyzing emergency response for fish welfare emergencies in sea-based fish farming. The model enables decision-makers to evaluate the emergency preparedness level against incidents ... -
Digital Twins for Fault Prognosis in Offshore Wind Turbine Drivetrains
(Doctoral theses at NTNU;2024:178, Doctoral thesis, 2024)This thesis investigates the relatively novel concept of Digital Twin (DT) in the context of offshore wind turbine drivetrains. DT can be described as a virtual representation of a system or asset that calculates system ... -
A phase-time-path-difference approach for online wave direction and wave number estimation from measured ship motions in zero and forward speed using a single inertial measurement unit
(Journal article; Peer reviewed, 2023)This study investigates the potential capability of a relatively new and unexplored signal-based approach for shipboard wave estimation. The approach uses the phase-time-path-differences (PTPDs) from an array of shipboard ... -
Flow topology in the gap and wake of convex curved tandem cylinders
(Journal article; Peer reviewed, 2023)Flow around curved tandem cylinders in the convex configuration has been studied by means of direct numerical simulations, for a Reynolds number of 500 and a nominal gap ratio of 3.0. Spanwise variation of flow regimes, ... -
Asymmetric cellular bi-stability in the gap between tandem cylinders
(Peer reviewed; Journal article, 2023)In the gap region of tandem cylinders, within the reattachment regime, bi-stability is seen to be cellular. Direct numerical simulations at a Reynolds number of 500, and a gap ratio of 3.0, show that shedding of gap vortices ...