Blar i Institutt for marin teknikk på emneord "VDP::Technology: 500::Marine technology: 580::Offshore technology: 581"

Viser treff 1-8 av 8

    • A Tension-based Position Estimation Approach for Moored Marine Vessels 

      Ren, Zhengru; Skjetne, Roger; Kjerstad, Øivind Kåre (10th IFAC Conference on Manoeuvring and Control of Marine Craft;MCMC 2015, Journal article; Peer reviewed, 2015)
      This paper presents a novel idea on a tension-based localization approach as a redundancy measure to handle the situation when the position reference (posref) signals are not available or significant GNSS drifts occur, ...

    • Image Processing for Ice Floe Analyses in Broken-ice Model Testing 

      Zhang, Qin; Skjetne, Roger; Metrikin, Ivan; Løset, Sveinung (Journal article; Peer reviewed, 2015)
      The ice floe shape and size distribution are important ice parameters in ice-structure analyses. Before performing an analysis at full scale, the dynamic positioning (DP) experiments in model ice at the Hamburg Ship Model ...

    • Modeling and Control for Dynamic Positioned Marine Vessels in Drifting Managed Sea Ice 

      Kjerstad, Øivind Kåre; Skjetne, Roger (Journal article; Peer reviewed, 2014)
      This paper presents a development framework for dynamic positioning control systems for marine vessels in managed ice. Due to the complexity of the vessel-ice and ice-ice interactions a configurable high fidelity numerical ...

    • Online reconstruction of drifting underwater ice topography: The 2D case 

      Jørgensen, Ulrik; Skjetne, Roger (Journal article; Peer reviewed, 2015)
      An online estimation design for a drifting two dimensional ice topography is presented. Under the assumption that the topography can be accurately represented by a truncated Fourier series, and given a moving window of ...

    • Supervisory Control of Line Breakage for Thruster-Assisted Position Mooring System 

      Ren, Zhengru; Skjetne, Roger; Hassani, Vahid (Chapter, 2015)
      Thruster-assisted position mooring (TAPM) is an energy-efficient and reliable stationkeeping method for deep water structures. Mooring line breakage can significantly influence the control system, and ultimately reduce ...

    • The Arctic DP Research Project: Effective Stationkeeping in Ice 

      Skjetne, Roger; Imsland, Lars Struen; Løset, Sveinung (Journal article; Peer reviewed, 2014)
      Stress on the environment from a potentially growing energy use is set to rise. Without doubt the energy resources in Arctic regions will be developed. An important goal will be to exploit the resources offered by for ...

    • Using Autonomous Underwater Vehicles as Sensor Platforms for Ice-Monitoring 

      Norgren, Petter; Skjetne, Roger (Journal article; Peer reviewed, 2014)
      Due to the receding sea-ice extent in the Arctic, and the potentially large undiscovered petroleum resources present north of the Arctic circle, offshore activities in ice-infested waters are increasing. Due to the presence ...

    • Verification and Examination Management of Complex Systems 

      Ruud, Stian Knud; Skjetne, Roger (Journal article; Peer reviewed, 2014)
      As ship systems become more complex, with an increasing number of safety-critical functions, many interconnected subsystems, tight integration to other systems, and a large amount of potential failure modes, several industry ...