Browsing NTNU Open by Author "Heyn, Hans-Martin"
Now showing items 1-18 of 18
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A large scale simulation of floe-ice fractures and validation against full-scale scenario
Lu, Wenjun; Heyn, Hans-Martin; Lubbad, Raed; Løset, Sveinung (Journal article; Peer reviewed, 2018)While interacting with a sloping structure, an ice floe may fracture in different patterns. For example, it can be local bending failure or global splitting failure depending on the contact properties, geometry and confinement ... -
A system for automated vision-based sea-ice concentration detection and floe-size distribution indication from an icebreaker
Heyn, Hans-Martin; Knoche, Martin; Zhang, Qin; Skjetne, Roger (Chapter; Peer reviewed, 2017)This paper presents a ship-mounted multi-lens camera system for sea-ice monitoring and algorithms to automatically evaluate the sea-ice concentration and to indicate the floe-sizes in a radius of 100 meter around the vessel. ... -
Autonomous heading control in position mooring with thruster assist
Johannessen, Silje Aarvik (Master thesis, 2017)The main topic of this thesis is Thruster-Assisted Position Mooring (TAPM), which is a positioning system for automatic thruster assistance of a moored structure. The system has been commercially available since the late ... -
Battery Management System for a low-cost ROV
Gulsvik, Knut Amund Knutsen (Master thesis, 2017)A combination of advanced State-of-charge (SoC), State-of-Health (SoH) and State-of-Power (SoP) estimation techniques have been combined into a novel scheme to ensure safe and efficient operation of a battery pack. A ... -
Control and Simulation of a Thruster-Assisted Moored Offshore Vessel in Sea-ice
Gjessing, Ivar Aleksander (Master thesis, 2015)The exploration of the northern seas is constantly raising new and interesting research topics in order to adapt our technology to handle this extraordinary harsh climate. Darkness, remoteness, cold and harsh weather, and ... -
Distributed motion sensing on ships
Heyn, Hans-Martin; Udjus, Guttorm; Skjetne, Roger (Journal article; Peer reviewed, 2017)A current trend is autonomous transport of goods and people in the air, at land, and at sea. For safe and reliable operations, autonomous systems require sensors that replace, or even exceed, the senses of a human operator. ... -
Distributed sensing of loads acting against the hull of a stationkeeping vessel in ice
Heyn, Hans-Martin; Skjetne, Roger; Scibilia, Francesco (Chapter, 2018)This paper introduces the concept of distributed motion sensing for stationkeeping vessels in ice infested waters. During the SKT 2017 project, conducted in February and March 2017 in the Bay of Bothnia, five inertial ... -
Fast onboard detection of ice drift changes under stationkeeping in ice
Heyn, Hans-Martin; Skjetne, Roger (Peer reviewed; Journal article, 2022)Early detection of ice drift changes is essential for safe stationkeeping in ice-infested waters. This paper presents a conceptual system allowing onboard detection of ice drift changes in managed and unmanaged ice using ... -
Fault Tolerant Control of Thruster-Assisted Position Mooring System
Ren, Zhengru (Master thesis, 2015)This thesis fo cu ses on the fau lt-to lerant control al gor ithm o f the thr u ster-assiste d posi tio n moor ing system ( TAPM). TAPM is an energy-efficient and reliable stationkeeping method for deep water structures. ... -
Force Field Identification and Positioning Control of an Autonomous Vessel using Inertial Measurement Units
Udjus, Guttorm (Master thesis, 2017)In this thesis, a system of four sensors for measuring tri-axis translational accelerations and rotational velocities is designed. The sensors were mounted with a spatial distribution on board the ship model C/S Arctic ... -
Ice condition assessment using onboard accelerometers and statistical change detection
Heyn, Hans-Martin; Blanke, Mogens; Skjetne, Roger (Journal article; Peer reviewed, 2019)The presence of sea ice is the predominant risk for ship operations in the Arctic, and monitoring of ice condition around a vessel is crucial during all times of operation. This paper presents a system for online onboard ... -
Low-Cost Observer and Path-Following Adaptive Autopilot for Ships
Mykland, Alexander (Master thesis, 2017)In this thesis a signal-based observer and a path-following autopilot design will be derived and implemented on the model vessel C/S Enterprise I. Using scaling methods the goal is to transfer the controllers into a full ... -
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, ... -
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 ... -
Motion sensing on vessels operating in sea ice: A local monitoring system for transit and stationkeeping operations under the influence of sea ice
Heyn, Hans-Martin (Doctoral theses at NTNU;2019: 138, Doctoral thesis, 2019)The diminishing sea ice in the Arctic and Antarctic could lead to a higher number of ship operations in these areas, such as cargo transit, resource exploration, fishing, and tourism. However, despite the sea ice reduction, ... -
System Identification and State Estimation for ROV uDrone
Sandøy, Stian Skaalvik (Master thesis, 2016)This master thesis makes an introduction to all aspects of the design of an advanced model-based control system for the Remotely Operated Vehicle (ROV) uDrone. The design of thrust allocation along with a known mathematical ... -
Thruster-Assisted Position Mooring of C/S Inocean Cat I Drillship
Bjørnø, Jon (Master thesis, 2016)This thesis presents the development of a new research foundation into the Marine Cybernetic Laboratory, the C/S Inocean Cat I Drillship. This is a 1:90 scaled model of an Arctic drillship design by Inocean for Statoil. The ... -
Time-frequency analysis of acceleration data from ship-ice interaction events
Heyn, Hans-Martin; Skjetne, Roger (Journal article; Peer reviewed, 2018)During operations with ships in ice-infested waters, vibrations of the hull occur due to ship-ice interaction. The acting ice load and the induced vibrations depend on the ice regime and ice breaking mechanism. Especially ...