Browsing Institutt for marin teknikk by Title
Now showing items 3223-3242 of 3472
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Tools and Methods for Autonomous Operations on Seabed and Water Column using Underwater Vehicles
(Doctoral theses at NTNU;2016:370, Doctoral thesis, 2016)This thesis concerns several aspects of the automatic system that controls the behavior of Remotely Operated Vehicles (ROVs), and elaborates the data collected during the operations. It presents the algorithms used to ... -
Tools and methods to manage risk in autonomous subsea inspection, maintenance and repair operations
(Doctoral theses at NTNU;2018:71, Doctoral thesis, 2018)Autonomous subsea interventions are anticipated to decrease operational costs, reduce response time and optimally maintain the subsea infrastructure. However, the introduction of autonomy may lead to emerging risk factors ... -
Topics in dynamic positioning: System identification, GNSS and MRU lever arm estimation, and hybrid integral action
(Master thesis, 2014)This thesis consists of three main parts. The first part of the master thesis looks at the identification of thruster dynamics and low speed ship dynamics. The relevant parameters identified are time constants and time ... -
Torsion Buckling of Dynamic Flexible Risers
(Master thesis, 2016)Themain purpose of this work is to contribute to better understanding of the torsion structural stability and kink formation process of flexible risers in catenary configuration. The thesis deals with installation criteria ... -
Torsion instability of Dynamic Cables during Installation
(Master thesis, 2017)The oil and gas industry today is a heavily regulated segment, and current standard hasestablished restrictions which yields a very limited weather window for offshore cable installations. This is due to ... -
Torsion instability of Flexible Pipes at the TDP - Torsjonsinstabilitet av fleksible rør med sjøbunnskontakt
(Master thesis, 2017)Dynamic flexible risers are a common term for cables, umbilicals and flexible pipes,that are freely or semi-freely suspended between two points (offshore). Flexible pipes are mostly used to transport fluids between ... -
Total Equipment Monitoring - Ship equipment operation, performance and cost monitoring for VLGCs and LGCs
(Master thesis, 2013)This thesis has been carried out in cooperation with Solvang ASA, as a part of Energy Management in Practice 2 (EMIP-2). EMIP?s vision is to enable a robust knowledge and innovation platform related to energy efficiency ... -
Total experimental uncertainty in hydrodynamic testing of a semisubmersible wind turbine, considering numerical propagation of systematic uncertainty
(Journal article; Peer reviewed, 2020)Quantifying the uncertainty in experimental results is a critical step in properly validating numerical simulation tools for designing floating wind turbines; without a good understanding of the experimental uncertainties, ... -
Toward a holistic load model for structures in broken ice
(Journal article; Peer reviewed, 2015)Over the past decade we have seen an increase in marine operations in Arctic waters. Despite research and work on several offshore standards and ship rules, the ice loads on fixed and floating structures are not fully ... -
Toward a system of real-time prediction and monitoring ofbottom damage conditions during ship grounding
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:223, Doctoral thesis, 2011)This work o ers an analysis of the ship grounding process, examining a range of topics from the ability to predict the location of obstructions to a ship bottom's resistance to penetration and outer and inner hull plates' ... -
Toward adaptive robotic sampling of phytoplankton in the coastal ocean
(Journal article; Peer reviewed, 2019)Currents, wind, bathymetry, and freshwater runoff are some of the factors that make coastal waters heterogeneous, patchy, and scientifically interesting—where it is challenging to resolve the spatiotemporal variation within ... -
Towards an online risk model for autonomous marine systems (AMS)
(Peer reviewed; Journal article, 2022)Considering that few or no human operators are directly involved in the operation of Autonomous Marine Systems (AMS), an online risk model is necessary to enhance the intelligence of the AMS, its situation awareness, and ... -
Towards an online risk model for dynamic positioning operations
(Chapter, 2018)Automation and increasing complexity mean that operators have to handle data and alarms and emergent decisions under the pressure of unexpected and rapidly changing hazardous situations. Position loss during marine operations ... -
Towards automated identification of ice features for surface vessels using deep learning
(Journal article; Peer reviewed, 2019)Ship traffic in ice exposed areas is increasing, and ice navigation is largely a manual task. Despite the progress in machine learning and computer vision algorithms, little focus has been given to computer-aided scene ... -
Towards automated welfare monitoring of farmed salmon exploiting deep learning and computer vision
(Master thesis, 2021)Bevaring av fiskevelferd er et omfattende tema i oppdrettsnæringen. En industriell laksemerd kan inneholde så mange som 200 000 fisk, og det er utfordrende å overvåke velferden til denne mengden enkeltdyr. Manuelle ... -
Towards Autonomous Operations and Systems in Marine Archaeology
(Doctoral theses at NTNU;2018:203, Doctoral thesis, 2018)A large part of our common cultural heritage, ranging from submerged prehistoric landscapes to modern steel wrecks, lies on the seabed. For centuries they have remained protected by depth and remoteness, but are now under ... -
Towards Autonomous ROVs in Aquaculture: Implementation of Autonomous Mission Control for Unmanned Operations
(Master thesis, 2021)I denne oppgaven utformes og implementeres et autonomt system for oppdragskontroll av en autonom ROV, slik at den er i stand til å utføre autonome undervanns- inspeksjons-, vedlikeholds- og reparasjonsoppdrag innenfor ... -
Towards Autonomous Ships
(Master thesis, 2019)Hovedtemaet i denne masteroppgaven er situasjonsforståelse. Oppgaven er todelt, hvor første del handler om sjøtilstandsestimering for et dynamisk posisjonert (DP) fartøy, og andre del handler om risikobaserte beslutninger ... -
Towards autonomous underwater navigation and perception for end-to-end ship hull inspection
(Doctoral theses at NTNU;2024:68, Doctoral thesis, 2024)This thesis presents an innovative and integrated solution for end-to-end underwater ship hull inspection using a small and low-cost Remotely Operated Vehicle (ROV). In a world where maritime activities have significant ... -
Towards autonomy in ROV operations
(Journal article, 2015)This paper presents an on-going research project focusing on the development of technology to enable autonomy in ROV operations. The project is a collaborative project between Norwegian offshore industry and academia. ...