Browsing NTNU Open by Author "Æsøy, Vilmar"
Now showing items 1-20 of 43
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A Comprehensive Survey of Prognostics and Health Management based on Deep Learning for Autonomous Ships
Ellefsen, Andre; Ushakov, Sergey; Æsøy, Vilmar; Zhang, Houxiang (Journal article; Peer reviewed, 2019)The maritime industry widely expects to have autonomous and semiautonomous ships (autoships) in the near future. In order to operate and maintain complex and integrated systems in a safe, efficient, and cost-beneficial ... -
A multi-body dynamic model based on bond graph for maritime hydraulic crane operations
Chu, Yingguang; Æsøy, Vilmar (Chapter; Peer reviewed, 2015)This paper presents a bond graph model of a maritime crane lifting system comprised of a 3DOFs crane with three revolute joints, a winch, a segment of wire, and a pendulum load. The multi-body model contains the dynamic ... -
Alternative locations of hydrogen-factory utilising surplus energy in Hellesylt, for zero-emission maritime transport in Geiranger
Giske, Even Nøtland; Kroken, Stian Olsen (Bachelor thesis, 2020)Denne bacheloroppgaven har som mål å finne en god løsning for å utnytte overskuddsenergi i Hellesylt til produksjon av Hydrogen til ferjeruten Hellesylt - Geiranger. Overskuddsenergien i Hellesylt skyldes at strømnettet ... -
An Object-Oriented Modeling Approach to Virtual Prototyping of Marine Operation Systems Based on Functional Mock-Up Interface Co-Simulation
Chu, Yingguang; Hatledal, Lars Ivar; Æsøy, Vilmar; Ehlers, Sören; Zhang, Houxiang (Journal article; Peer reviewed, 2018)This paper presents an object-oriented modeling (OOM) approach to model development of marine operation systems, specifically the hydraulic systems of marine cranes. Benefited from the rapid development of computation ... -
An Unsupervised Reconstruction-Based Fault Detection Algorithm for Maritime Components
Ellefsen, Andre; Bjørlykhaug, Emil Dale; Æsøy, Vilmar; Zhang, Houxiang (Journal article; Peer reviewed, 2019)In recent years, the reliability and safety requirements of ship systems have increased drastically. This has prompted a paradigm shift toward the development of prognostics and health management (PHM) approaches for these ... -
Applying System-Oriented Sustainability Scoring for Cruise Traffic Port Operators: A Case Study of Geiranger, Norway
Johansen, Børge Andreas Heggen; Aspen, Dina Margrethe; Sparrevik, Magnus; Æsøy, Vilmar (Peer reviewed; Journal article, 2021)Balancing the positive and negative impacts of cruise tourism is a challenging task for port operators. Necessary information for cruise port planning and decision making may be laborious to acquire and further combine for ... -
Auto-docking av lite passasjerfartøy
Hagen, Eivind (Bachelor thesis, 2019)Denne bacherloroppgaven er skrevet for NTNU Ålesund, og går ut på å utvikle et konsept for automatisk docking og lading av autonome passasjerbåter. Dette dockingkonseptet er tenkt som en del av bypakken i Ålesund, der ... -
Automatic Fault Detection for Marine Diesel Engine Degradation in Autonomous Ferry Crossing Operation
Ellefsen, Andre; Cheng, Xu; Holmeset, Finn Tore; Ushakov, Sergey; Æsøy, Vilmar; Zhang, Houxiang (IEEE International Conference on Mechatronics and Automation;, Chapter, 2019)The maritime industry generally anticipates having semi-autonomous ferries in commercial use on the west coast of Norway by the end of this decade. In order to schedule maintenance operations of critical components in a ... -
Component-based Modelling and Simulation for Marine Crane System Design.
Li, Yu (Master thesis, 2016)This master thesis is going to develop a hydraulic components library for modelling and simulation for marine crane system design. The topic of this thesis is "Component-based modelling and simulation for marine crane ... -
Computational Fluid Dynamics Simulations of Nonlinear Sloshing in a Rotating Rectangular Tank Using the Level Set Method
Grotle, Erlend Liavåg; Bihs, Hans; Æsøy, Vilmar; Pedersen, Eilif (Journal article; Peer reviewed, 2018)In this paper, numerical simulations of nonlinear sloshing in rectangular tanks are presented. Model implementations in the open source software reef3d are tested, and the results are compared with experimental data from ... -
Control of the combustion process and emission formation in marine gas engines
Krivopolianskii, Vladimir; Valberg, Ingebrigt; Stenersen, Dag; Ushakov, Sergey; Æsøy, Vilmar (Journal article; Peer reviewed, 2018)A smooth transition to the use of gas engines instead of conventional engines in marine shipping is a logical pathway for compliance with tightening environmental regulations. Currently, five major gas engine concepts are ... -
Design Optimization of Exhaust Gas Economizer Using CFD Simulations for Medium Speed Marine Diesel Engines Combine with Exhaust After Treatment
Hewagama, Prabath Priyadarshana (Master thesis, 2021)Denne oppgaven presenterer optimaliseringen av avgassøkonomiseringsenheten til et spillgjenvinningssystem for en middels hastighets marine dieselmotor ved bruk av CFD-simuleringer og kombinert systemkonseptutvikling med ... -
Development of a parametric CAD model for braided ropes
Rødal, Bodil (Master thesis, 2019)Fletting har eksistert i århundrer og er kanskje mest kjent i form av hårfletting. I dag har fletting mange forskjellige bruksområder. Det er brukt i både tekstil-, medisin-, fly- og marin industri. Motivasjonene for denne ... -
Distributed Co-Simulation of Maritime Systems and Operations
Sadjina, Severin Simon; Kyllingstad, Lars Tandle; Rindarøy, Martin; Skjong, Stian; Æsøy, Vilmar; Pedersen, Eilif (Journal article, 2018)Here, we present the concept of an open virtual prototyping framework (VPF) for maritime systems and operations that enables its users to develop reusable component or subsystem models, and combine them in full-system ... -
An effective model-based thruster failure detection method for dynamically positioned ships
Wang, Tongtong; Li, Guoyuan; Skulstad, Robert; Æsøy, Vilmar; Zhang, Houxiang (Chapter, 2020)This paper presents an effective model-based thruster failure detection and isolation method for dynamically positioned (DP) offshore surface vessels. A DP vessel is supposed to maintain its position and heading at a ... -
Emission Reduction Technology and Cost Efficiency for Ships Operating on the Northern Sea Route - A Case Study
Skarbø, Runa A. (Master thesis, 2014)The purpose of this thesis is to determine whether the Northern Sea Route (NSR) is a more cost effective alternative than the Suez Canal Route (SCR) between Asia and Europe, given an introduction of an Emission Control ... -
Experimental and Numerical Investigation of Sloshing under Roll Excitation at Shallow Liquid Depths
Grotle, Erlend Liavåg; Bihs, Hans; Æsøy, Vilmar (Journal article; Peer reviewed, 2017)This paper investigates sloshing at shallow-liquid depths in a rectangular container by using experimental and numerical methods. A motion platform is used to perform a prescribed periodic rotational motion to excite the ... -
Experimental Investigation of Injection and Combustion Processes in Marine Gas Engines Using Constant Volume Rig
Krivopolianskii, Vladimir (Doctoral theses at NTNU;2019:96, Doctoral thesis, 2019)In circumstances of the strong demand for a reduction of harmful emissions from ships, one of the main pathways of the development of marine power plants is improvement of the existing and development of new gas engine ... -
Experimental Study of Ignition Delay, Combustion, and NO Emission Characteristics of Hydrogenated Vegetable Oil
Krivopolianskii, Vladimir; Bjørgen, Karl Oskar Pires; Emberson, David; Ushakov, Sergey; Æsøy, Vilmar; Løvås, Terese (Journal article; Peer reviewed, 2019)In this article, a comparative study of hydrogenated vegetable oil (HVO) and diesel was performed in two constant volume combustion rigs and an optical accessible compression-ignited chamber (OACIC). Ignition, combustion, ... -
Ice-propeller impact analysis using an inverse propulsion machinery simulation approach
Polić, Dražen (Doctoral theses at NTNU;2019:235, Doctoral thesis, 2019)