• A Structure Preserving Power System Frequency Model for Dynamic Positioning Vessels 

      Dahl, Andreas Reason; Skjetne, Roger; Johansen, Tor Arne (Chapter; Peer reviewed, 2017)
      This paper adapts a structure preserving model to on-board power plants. The model, originally developed for land-based power systems, is expanded for the larger frequency range allowable to on-board plants. State-space ...
    • Marine Autonomous Exploration using a Lidar 

      Ueland, Einar Skiftestad (Master thesis, 2016)
      This thesis reviews the complete design of a control system on a marine surface vessel, capable of autonomous exploration in small-scale marine environments. This involves the development of strategies for map exploration, ...
    • Marine Autonomous Exploration Using a Lidar and SLAM 

      Ueland, Einar Skiftestad; Skjetne, Roger; Dahl, Andreas Reason (Chapter; Peer reviewed, 2017)
      This paper presents the implementation of a 2D-lidar to a model-scale surface vessel, and the design of a control system that makes the vessel able to perform autonomous exploration of a small-scale marine environment by ...
    • Marine Inverted Pendulum 

      Sharoni, Rotem (Master thesis, 2016)
      The purpose of this thesis is to investigate whether an inverted pendulum can be balanced on a hydrodynamic platform actuated by thrusters. The vessel is the omnidirectional CS Saucer actuated by three rotating azimuth ...
    • Marine Vessel and Power Plant System Simulator 

      Bø, Torstein Ingebrigtsen; Dahl, Andreas Reason; Johansen, Tor Arne; Mathiesen, Eirik; Rejani Miyazaki, Michel; Pedersen, Eilif; Skjetne, Roger; Sørensen, Asgeir Johan; Thorat, Laxminarayan; Yum, Kevin K. (Journal article; Peer reviewed, 2015)
      Modern marine electric propulsion vessels have many systems. These interactions and integration aspects are essential when studying a system and subsystem behavior. This is especially important when considering fault ...
    • Model Predictive Control of Marine Vessel Power System by Use of Structure Preserving Model 

      Dahl, Andreas Reason; Thorat, Laxminarayan; Skjetne, Roger (Journal article; Peer reviewed, 2018)
      The paper presents model predictive control (MPC) based on an optimization model drawn from the structure preserving model (SPM) for marine vessel power systems. Three objective functions are proposed to control frequency, ...
    • Modeling, Parameter Identification and Thruster-Assisted Position Mooring of C/S Inocean Cat I Drillship 

      Bjørnø, Jon; Heyn, Hans-Martin; Skjetne, Roger; Dahl, Andreas Reason; Frederich, Preben (Chapter; Peer reviewed, 2017)
      A thruster-assisted position mooring (TAPM) system includes different control functions for stationkeeping and motion damping for a moored offshore vessel with assist from thrusters. It consists of a conventional mooring ...
    • Path Planning and Guidance for Marine Surface Vessels 

      Dahl, Andreas Reason (Master thesis, 2013)
      Path planning and guidance for marine surface vesselsis the main topic of this thesis. The subject is of great relevance both for unmanned surface vehicles (USV) and for autopilot systems for manned vessels.A general ...
    • Real-Time Marine Vessel and Power Plant Simulation 

      Bø, Torstein Ingebrigtsen; Johansen, Tor Arne; Dahl, Andreas Reason; Rejani Miyazaki, Michel; Pedersen, Eilif; Rokseth, Børge; Skjetne, Roger; Sørensen, Asgeir Johan; Thorat, Laxminarayan; Utne, Ingrid Bouwer; Yum, Koosup; Mathiesen, Eirik (Chapter; Peer reviewed, 2015)
      In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, ...