Browsing NTNU Open by Author "Kjerstad, Øivind Kåre"
Now showing items 1-10 of 10
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A method for real-time estimation of full-scale global ice loads on floating structures
Kjerstad, Øivind Kåre; Lu, Wenjun; Skjetne, Roger; Løset, Sveinung (Journal article; Peer reviewed, 2018)This paper proposes an algorithm that uses conventional measurements found on-board ships coupled with additional Inertial Measurement Units to estimate the motions and global loads acting on them. The work is motivated ... -
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, Conference object; 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, ... -
AMOS DP Research Cruise 2016: Academic full-scale testing of experimental dynamic positioning control algorithms onboard R/V Gunnerus
Skjetne, Roger; Sørensen, Mikkel Eske Nørgaard; Breivik, Morten; Værnø, Svenn Are Tutturen; Brodtkorb, Astrid H.; Sørensen, Asgeir Johan; Kjerstad, Øivind Kåre; Calabrò, Vincenzo; Vinje, Bjørn Ole (Chapter; Peer reviewed, 2017)In order to validate relevant dynamic positioning (DP) control algorithms in a realistic environment, a full-scale DP test campaign, the AMOS DP Research Cruise 2016 (ADPRC’16), was organized in a collaboration between the ... -
An Ice-Drift Estimation Algorithm Using Radar and Ship Motion Measurements
Kjerstad, Øivind Kåre; Løset, Sveinung; Skjetne, Roger; Skarbø, Runa A. (Journal article; Peer reviewed, 2018)This paper presents a novel automatic real-time remote sensing algorithm that uses radar images and global positioning satellite system measurements to estimate the ice-drift velocity vector in a region around a free-floating ... -
Disturbance rejection by acceleration feedforward for marine surface vessels
Kjerstad, Øivind Kåre; Skjetne, Roger (Journal article; Peer reviewed, 2016)Acceleration signals have a powerful disturbance rejection potential in rigid body motion control, as they carry a measure proportional to the resulting force. Yet, they are seldom used, since measuring, decoupling, and ... -
Disturbance rejection by acceleration feedforward: Application to dynamic positioning
Kjerstad, Øivind Kåre; Skjetne, Roger; Jenssen, Nils Albert (Conference object, 2011) -
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 ... -
Topics in dynamic positioning: System identification, GNSS and MRU lever arm estimation, and hybrid integral action
Tutturen, Svenn Are (Master thesis, 2014)This thesis consists of three main parts. The first part of the master thesis looks at the identification of thruster dynamics and low speed ship dynamics. The relevant parameters identified are time constants and time ... -
Weather-Optimal Positioning Control for Underactuated USVs
Kjerstad, Øivind Kåre (Master thesis, 2010)This thesis considers the design and development of a weather optimal positioning control system which is implemented on a developed 6 degrees of freedom vessel model of a Viknes 830 augmented with actuator and environmental ... -
Weather-Optimal Positioning Control for Underactuated USVs
Kjerstad, Øivind Kåre (Master thesis, 2010)This thesis considers the design and development of a weather optimal positioning control system which is implemented on a developed 6 degrees of freedom vessel model of a Viknes 830 augmented with actuator and environmental ...