Browsing Institutt for marin teknikk by Title
Now showing items 2506-2525 of 3472
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Parametric Roll Resonance of a Fishing Vessel as function of Forward Speed and Sea State
(Master thesis, 2011)The subject of this thesis is sea keeping and stability of a fishing vessel in regular waves, with focus on parametric roll resonance. Parametric roll resonance is resonance in roll due to time variation of a parameter, ... -
Parametric Studies of Dynamic Response for a Workover Riser
(Master thesis, 2014)A workover riser is a top tensioned riser, in essence similar to a marine riser. Workover risers differ from marine risers mainly by smaller dimensions, as well as simpler solutions at the riser ends. For instance, the ... -
Parametrisation of aquatic vegetation in hydraulic and coastal research: The importance of plant biomechanics in the hydrodynamics of vegetated flows
(Doctoral thesis at NTNU;2016:138, Doctoral thesis, 2016)Understanding the complexity of the interactions between aquatic biological systems and their physical environment is a critical condition for the sustainable management of aquatic environments. In such ecosystems, aquatic ... -
Particle Filter for Fault Diagnosis and Ropbust Navigation of Underwater Robot
(Journal article; Peer reviewed, 2014)A particle filter (PF)-based robust navigation with fault diagnosis (FD) is designed for an underwater robot, where 10 failure modes of sensors and thrusters are considered. The nominal underwater robot and its anomaly are ... -
Particle Filter for Fault Diagnosis: Applications to Dynamic Positioning Vessels and Underwater Robotics
(Doctoral thesis at NTNU;2015:160, Doctoral thesis, 2015)Safety remains an important consideration in control system design. This is particularly true for the control systems that are employed by the offshore petroleum and maritime industries, in which authorities continually ... -
Particulate matter emission characteristics from diesel engines operating on conventional and alternative marine fuels
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:341, Doctoral thesis, 2012)The awareness of adverse health effects associated with diesel aerosol emissions has generated a great public and academic interest in studying various aerosol-producing sources. While automotive industry has achieved ... -
Passive Control of a Pentapod Offshore Wind Turbine under Earthquakes by Using Tuned Mass Damper
(Chapter; Peer reviewed, 2017)The finite element model (FEM) of a pentapod offshore wind turbine (OWT) is established in the newly compiled FAST. The dynamic responses of the OWT are analyzed in detail. Further, a tuned mass damper as a passive control ... -
Passive Mooring-based Turbine Repositioning Technique for Wake Steering in Floating Offshore Wind Farms
(Peer reviewed; Journal article, 2024)Power loss due to wake effects from upstream wind turbines is an important factor in the design of floating wind farms. These wake disturbances also increase fatigue loads on downstream units. Economic-driven wind farm ... -
Passive Oscillating Foils for Additional Propulsion under Calm Conditions
(Master thesis, 2019)Denne masteroppgaven tar for seg ulike konsepter som kan bidra til å øke hastigheten til the Ocean Cleanup sitt pilot prosjekt, System 001. Ettersom systemet opererer i Stillehavet, mellom Hawaii og California, var det ... -
Path Following Control of Underactuated Surface Vessels in the Presence of Multiple Disturbances
(Chapter, 2019)An integral version of the line-of-sight guidance method is shown to compensate for both kinematic and dynamic disturbances generated by wind, waves and sea currents. The guidance law is designed for path following tasks ... -
Path generation for high-performance motion of ROVs based on a reference model
(Journal article; Peer reviewed, 2015)This paper deals with the generation of sufficiently smooth position, velocity, and acceleration references for guiding the motion of an ROV along purposefully defined curvature-continuous paths in automated missions. The ... -
Path planning for marine vehicles using Bezier curves
(Journal article; Peer reviewed, 2018)Over the past few years maritime sector has witnessed an increasing interest in use of autonomous ships and in particular Autonomous Surface Vehicles (ASV) in complex applications with high associated risks. There is an ... -
Path Planning for Marine Vehicles using Bézier curves
(Master thesis, 2018)The maritime sector have over the last few years witnessed a growing demand for the development of Autonomous Surface Vehicles (ASV), capable of performing complex tasks with high associated risk. Central in this development ... -
Peak-shaving Control of Loads on Diesel-Generators in Hybrid Electric Ships
(Master thesis, 2016)Electric propulsion is quite common on dynamic positioned (DP) vessels, due to benefits with regards to operational availability, safety, cost effectiveness and flexibility. Thrusters, auxiliary equipment and other electric ... -
Penalty coupling of non-matching isogeometric Kirchhoff-Love shell patches with application to composite wind turbine blades
(Journal article; Peer reviewed, 2018)Isogeometric analysis (IGA) has been a particularly impactful development in the realm of Kirchhoff–Love thin-shell analysis because the high-order basis functions employed naturally satisfy the requirement of C 1 continuity. ... -
Performance Analysis of Ball Mill Liner Based on DEM-FEM Coupling
(Peer reviewed; Journal article, 2020)In the paper, based on the finite element-discrete element method coupling and the coupled bionics theory, four lifting bar models with coupled bionic surface structures, such as smooth, transverse stripe, longitudinal ... -
Performance analysis of dynamic positioning observer algorithms: Application to the cybership models in MC-Lab
(Master thesis, 2023)Det Marin Kybernetikk Laboratorium (MC-Lab) har en voksende flåte av kyberskip som brukes til masteroppgaver og doktorgradsforskning. Denne masteroppgaven sammenligner Dynamisk Posisjonering Observer (DPO) algoritmer som ... -
Performance analysis of Flettner rotor installations
(Master thesis, 2022)I 2018 annonserte den internasjonale sjøfartsorganisasjonen sitt mål om å redusere utslippene av drivhusgasser med 50\% fra 2008 til 2050. Siden dette har det vært et økende fokus på å implementere utslippsreduserende ... -
Performance assessment of the energy system onboard an LNG FPSO
(Master thesis, 2011)LNG power and heat systems, the balance of demand is dependent of the feed gas and on the location of the production vessel. Further, the power and heat balance is dependent on the gas processing efficiencies and the air ... -
Performance comparison of analytical wake models calibrated on a large offshore wind cluster
(Journal article; Peer reviewed, 2024)This study benchmarks the performance of multiple analytical wake models using a multi-level hyperparameter optimization framework for calibrating models with SCADA data in the Belgian-Dutch offshore zone. The calibration ...