Browsing Institutt for marin teknikk by Author "Æsøy, Vilmar"
Now showing items 1-18 of 18
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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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 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) -
Modeling and Simulation of Maritime Systems and Operations for Virtual Prototyping using Co-Simulations
Skjong, Stian (Doctoral theses at NTNU;2017:374, Doctoral thesis, 2017-12-19) -
Modeling and Simulation of the Accumulator During Active Heave Compensation Operations
Chu, Yingguang; Æsøy, Vilmar; Bunes, Øyvind; Pedersen, Eilif (Chapter; Peer reviewed, 2016)The paper presents the modeling and simulation of the thermodynamics of the accumulator system of the heave compensation system. Heave compensators in offshore and subsea applications are used to reduce the relative vertical ... -
Remaining useful life predictions for turbofan engine degradation using semi-supervised deep architecture
Ellefsen, Andre; Bjørlykhaug, Emil; Æsøy, Vilmar; Ushakov, Sergey; Zhang, Houxiang (Journal article; Peer reviewed, 2018)In recent years, research has proposed several deep learning (DL) approaches to providing reliable remaining useful life (RUL) predictions in Prognostics and Health Management (PHM) applications. Although supervised DL ... -
Soot Investigation on Fish Oil Spray Combustion in a Constant Volume Cell
Malin, Maximilian Christoph; Krivopolianskii, Vladimir; Rygh, Bjørn; Æsøy, Vilmar; Pedersen, Eilif (Journal article; Peer reviewed, 2015)Maritime environmental regulations stipulate lower emissions from the shipping industry. To cope with these rules, improving the combustion processes, make use of cleaner alternative fuels and implement exhaust gas cleaning ... -
Validation of Data-Driven Labeling Approaches Using a Novel Deep Network Structure for Remaining Useful Life Predictions
Ellefsen, Andre; Ushakov, Sergey; Æsøy, Vilmar; Zhang, Houxiang (Journal article; Peer reviewed, 2019)Today, most research studies that aim to predict the remaining useful life (RUL) of industrial components based on deep learning techniques are using piecewise linear (PwL) run-to-failure targets to model the degradation ... -
Virtual Prototyping for Marine Crane Design and Operations
Chu, Yingguang (Doctoral theses;2018:10, Doctoral thesis, 2018)Marine crane system design is an interdisciplinary process involving such as mechanical design, kinematics, multi-body dynamics, hydraulics, and operational control-related tasks. Marine crane operations are inherently ... -
Virtual Prototyping of Maritime Systems and Operations: Applications of Distributed Co-Simulations
Skjong, Stian; Rindarøy, Martin; Kyllingstad, Lars Tandle; Æsøy, Vilmar; Pedersen, Eilif (Journal article, 2017)In this work, we demonstrate the use of co-simulation technology in the maritime industry through four relevant examples of applications based on the outcome of the knowledge-building project Virtual Prototyping of Maritime ...