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Blar i NTNU Open på forfatter "Skjong, Stian"

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    • A real-time simulator framework for marine power plants with weak power grids 

      Skjong, Stian; Pedersen, Eilif (Journal article, 2017)
      This work takes aim at presenting a generic real-time simulation framework for marine power plants with weak power grids, containing transient functionalities such as starting and stopping of arbitrary generators, and phase ...
    • Co-Simulation of a Marine Offshore Vessel in DP-Operations Including Hardware-In-the-Loop (HIL) 

      Skjong, Stian; Pedersen, Eilif (Chapter; Peer reviewed, 2017)
      In this work, a co-simulation case study of a marine offshore surface vessel in Dynamic Positioning (DP) operation, where the DP-controller is placed on an Arduino® micro-controller, is presented. The reasons for using ...
    • Complementarity of Data-Driven and Simulation Modeling Based on the Power Plant Model of the Offshore Vessel 

      Swider, Anna; Skjong, Stian; Pedersen, Eilif (Chapter; Peer reviewed, 2017)
      Nowadays, there are more ships equipped with on-board monitoring systems and vessels with many sensors are becoming a standard. Available measurements can be employed for system optimization which play an important role ...
    • Crane Rig: An Experimental Setup for Developing and Verifying New Control Methods for Marine Crane Operations 

      Evang, Thomas; Skjong, Stian; Pedersen, Eilif (Chapter; Peer reviewed, 2017)
      This paper will present the derivation of dynamic equations describing the motion of a knuckleboom crane for marine vessels. The dynamics will be derived using Lagrange’s equation, the theory of virtual work and generalized ...
    • Data-driven sea state estimation for vessels using multi-domain features from motion responses 

      Han, Peihua; Li, Guoyuan; Skjong, Stian; Wu, Baiheng; Zhang, Houxiang (Chapter, 2021)
      Situation awareness is of great importance for autonomous ships. One key aspect is to estimate the sea state in a real-time manner. Considering the ship as a large wave buoy, the sea state can be estimated from motion ...
    • A Deep Learning Approach to Detect and Isolate Thruster Failures for Dynamically Positioned Vessels Using Motion Data 

      Han, Peihua; Li, Guoyuan; Skulstad, Robert; Skjong, Stian; Zhang, Houxiang (Peer reviewed; Journal article, 2020)
      Vessels today are being fully monitored, thanks to the advance of sensor technology. The availability of data brings ship intelligence into great attention. As part of ship intelligence, the desire of using advanced ...
    • Directional wave spectrum estimation with ship motion responses using adversarial networks 

      Han, Peihua; Li, Guoyuan; Skjong, Stian; Zhang, Houxiang (Peer reviewed; Journal article, 2022)
      The external environmental conditions around a vessel are essential for efficient and safe ship operation, among which the sea state is of key importance. Considering the ship as a large wave buoy, the sea state can be ...
    • 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 ...
    • Energy conservation and power bonds in co-simulations: non-iterative adaptive step size control and error estimation 

      Sadjina, Severin Simon; Kyllingstad, Lars Tandle; Skjong, Stian; Pedersen, Eilif (Journal article; Peer reviewed, 2017)
    • A Framework for Condition Monitoring and Risk-Based Decision Support Involving a Vessel State Observer 

      Han, Xu; Leira, Bernt Johan; Sævik, Svein; Radhakrishnan, Gowtham; Skjong, Stian; Kyllingstad, Lars Tandle (Chapter, 2021)
      Digital twins have attracted significant attention across different domains for decades. In the maritime and the energy industries, digital twins have been mainly used for system condition monitoring, project visualization, ...
    • Hybrid power plant concepts for marine vessels 

      Wang, Chunsheng (Master thesis, 2017)
      As the requirements of energy supply for ships and marine vessels are becoming more rigorous and complex, new power supply methods are in highly interests in recent years. Flywheels used for energy storage have been used ...
    • Lumped, constrained cable modeling with explicit state-space formulation using an elastic version of Baumgarte stabilization 

      Skjong, Stian; Reite, Karl-Johan; Aarsæther, Karl Gunnar (Peer reviewed; Journal article, 2021)
      This paper presents a modeling approach for efficient simulation of slender structures, such as wires, cables and ropes.Lumped structural elements are connected using constraints.These are solved explicitly, using an elastic ...
    • 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 Hydraulic Winch System 

      Skjong, Stian; Pedersen, Eilif (Chapter, 2014)
    • Modeling of Generic Offshore Vessel in Crane Operations With Focus on Strong Rigid Body Connections 

      Rokseth, Børge; Skjong, Stian; Pedersen, Eilif (Journal article; Peer reviewed, 2016)
      Both marine surface vehicles and underwater vehicles are often equipped with cranes, robotic manipulators, or similar equipment. Much attention is given to modeling of both the dynamics of marine vehicles and the dynamics ...
    • Modeling, Simulation and Control of Hydraulic Winch System 

      Skjong, Stian (Master thesis, 2014)
      In this thesis a hydraulic low pressure winch system has been modeled using bond graph theory. The hydraulic winch system is assumed to be installed on an offshore vessel affected by environmental forces and disturbances ...
    • Non-angular MPC-based Thrust Allocation Algorithm for Marine Vessels - A Study of Optimal Thruster Commands 

      Skjong, Stian; Pedersen, Eilif (Journal article, 2017)
      In this paper, a thrust allocation algorithm for marine vessels based on model predictive control (MPC) theory and a nonangular vector formulation is presented and studied. The main objective in this paper is to highlight ...
    • On the numerical stability in dynamical distributed simulations 

      Skjong, Stian; Pedersen, Eilif (Journal article; Peer reviewed, 2019)
      This work takes aim at studying numerical stability in distributed simulations through dynamic stabilityand stability criteria for explicit solvers. This is done by studying outer stability limits, for example stabilityconditions ...
    • Onboard Tuning and Uncertainty Estimation of Vessel Seakeeping Model Parameters 

      Han, Xu (Doctoral theses at NTNU;2021:356, Doctoral thesis, 2021)
      The accurate prediction of critical vessel motions is essential for safe and cost-efficient marine operations. Compared with the difference-frequency responses that can be compensated by mooring and dynamic positioning ...
    • REGENERATION IN CRANE OPERATIONS 

      Øksnes, Jan Olav (Master thesis, 2017)
      In this thesis a marine power plant with a battery pack has been modeled using bond graph theory, using the bond graph simulation software 20-sim. The popularity of hybrid power systems are increasing in the marine sector, ...

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