Browsing AURA by Author "Hovland, Geir"
Now showing items 1-20 of 24
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A review on approaches for condition based maintenance in applications with induction machines located offshore
Cibulka, Jaroslav; Ebbesen, Morten K.; Hovland, Geir; Robbersmyr, Kjell G.; Hansen, Michael R. (Journal article; Peer reviewed, 2012)This paper presents a review of different approaches for Condition Based Maintenance (CBM) of induction machines and drive trains in offshore applications. The paper contains an overview of common failure modes, monitoring ... -
Adaptive Backstepping Control of Nonlinear Hydraulic-Mechanical System Including Valve Dynamics
Choux, Martin; Hovland, Geir (Journal article; Peer reviewed, 2010)The main contribution of the paper is the development of an adaptive backstepping controller for a nonlinear hydraulic-mechanical system considering valve dynamics. The paper also compares the performance of two variants ... -
Automatic Calibration of an Industrial RGB-D Camera Network Using Retroreflective Fiducial Markers
Aalerud, Atle; Dybedal, Joacim; Hovland, Geir (Peer reviewed; Journal article, 2019)This paper describes a non-invasive, automatic, and robust method for calibrating a scalable RGB-D sensor network based on retroreflective ArUco markers and the iterative closest point (ICP) scheme. We demonstrate the ... -
Autonomous mooring towards autonomous maritime navigation and offshore operations
Jha, Ajit; Subedi, Dipendra; Løvsland, Per-Ove; Tyapin, Ilya; Cenkeramaddi, Linga Reddy; Beferull-Lozano, Baltasar; Hovland, Geir (Chapter, 2020)Bollard is a vital component of mooring system. It is the anchor point for mooring ropes to be fixed in order to secure the vessel or ship. An algorithm that translates the segmented mask of bollard output from masked R-CNN ... -
Camera-LiDAR Data Fusion for Autonomous Mooring Operation
Subedi, Dipendra; Jha, Ajit; Tyapin, Ilya; Hovland, Geir (Journal article; Peer reviewed, 2020)The use of camera and LiDAR sensors to sense the environment has gained increasing popularity in robotics. Individual sensors, such as cameras and LiDARs, fail to meet the growing challenges in complex autonomous systems. ... -
Control of Redundant Flexible Manipulators with Redundancy Resolution
Subedi, Dipendra; Tyapin, Ilya; Hovland, Geir (Journal article; Peer reviewed, 2022)This paper deals with the online control of a redundant flexible link manipulator to achieve minimum oscillations using the redundancy resolution technique. Different redundancy resolution techniques proposed and used for ... -
Dynamic Augmented Kalman Filtering for Human Motion Tracking under Occlusion Using Multiple 3D Sensors
Aalerud, Atle; Hovland, Geir (Peer reviewed; Journal article, 2020)In this paper real-time human motion tracking using multiple 3D sensors has been demonstrated in a relatively large industrial robot work cell. The proposed solution extends state-of-the-art by augmenting the constant ... -
Dynamic Modeling of Planar Multi-Link Flexible Manipulators
Subedi, Dipendra; Tyapin, Ilya; Hovland, Geir (Peer reviewed; Journal article, 2021)A closed-form dynamic model of the planar multi-link flexible manipulator is presented. The assumed modes method is used with the Lagrangian formulation to obtain the dynamic equations of motion. Explicit equations of ... -
Embedded Processing and Compression of 3D Sensor Data for Large Scale Industrial Environments
Dybedal, Joacim; Aalerud, Atle; Hovland, Geir (Peer reviewed; Journal article, 2019)This paper presents a scalable embedded solution for processing and transferring 3D point cloud data. Sensors based on the time-of-flight principle generate data which are processed on a local embedded computer and compressed ... -
FMI4j: A Software Package for working with Functional Mock-up Units on the Java Virtual Machine
Hatledal, Lars Ivar; Zhang, Houxiang; Styve, Arne; Hovland, Geir (Chapter; Peer reviewed, 2018) -
FMU-proxy : A Framework for Distributed Access to Functional Mock-up Units
Hatledal, Lars Ivar; Zhang, Houxiang; Styve, Arne; Hovland, Geir (Journal article; Peer reviewed, 2019)The main goal of the Functional Mock-up Interface (FMI) standard is to allow simulation models to be shared across tools. To accomplish this, FMI relies on a combination of XML-files and compiled C-code packaged in a zip ... -
Hard material small-batch industrial machining robot
Brunete, Alberto; Gambao, Ernesto; Koskinen, Jukka; Heikkila, Tapio; Kaldestad, Knut Berg; Tyapin, Ilya; Hovland, Geir; Surdilovic, Dragoljub; Hernando, Miguel de Gabriel; Bottero, Aldo; Anton, Stefan (Journal article; Peer reviewed, 2018) -
Industrial Perception of a Human World : A Hitchhiker's Guide to Autonomy
Aalerud, Atle (Doctoral Dissertations at the University of Agder; nr. 341, Doctoral thesis, 2021)For several decades, industrial automation has helped companies save money and increase workplace safety so that many repetitive and dangerous tasks may be performed in a cost-efficient and secure manner. These systems ... -
Kinematic and Elastostatic Design Optimisation of the 3-DOF Gantry-Tau Parallel Kinematic Manipulator
Tyapin, Ilya; Hovland, Geir (Journal article; Peer reviewed, 2009)One of the main advantages of the Gantry-Tau machine is a large accessible workspace/footprint ratio compared to many other parallel machines. The Gantry-Tau improves this ration further by allowing a change of assembly ... -
A Language and Platform Independent Co-Simulation Framework Based on the Functional Mock-Up Interface
Hatledal, Lars Ivar; Styve, Arne; Hovland, Geir; Zhang, Houxiang (Peer reviewed; Journal article, 2019)The main goal of the Functional Mock-up Interface (FMI) standard is to allow the sharing of simulation models across tools. To accomplish this, FMI relies on a combination of XML-files and compiled C-code packaged in a zip ... -
A Language and Platform Independent Co-Simulation Framework Based on the Functional Mock-Up Interface
Hatledal, Lars Ivar; Styve, Arne; Hovland, Geir; Zhang, Houxiang (Peer reviewed; Journal article, 2019)The main goal of the Functional Mock-up Interface (FMI) standard is to allow the sharing of simulation models across tools. To accomplish this, FMI relies on a combination of XML-files and compiled C-code packaged in a zip ... -
Long Arm Manipulator Path Interpolation Using 4th Order B-Splines
Tyapin, Ilya; Hovland, Geir (Chapter; Peer reviewed, 2018) -
Methods for Experimentally Determining Stiffness of a Multi-Axis Machining Centre
Røsjordet, Jan Fredrik; Hovland, Geir (Journal article; Peer reviewed, 2019) -
Modeling and Analysis of Flexible Bodies Using Lumped Parameter Method
Subedi, Dipendra; Tyapin, Ilya; Hovland, Geir (Chapter, 2020)The modeling, identification and analysis of a flexible beam is presented. The lumped parameter method is used to model a flexible beam. The use of camera measurements to identify lumped parameters, namely spring stiffness ... -
Modeling of Offshore Crane and Marine Craft in Wave Motion
Landsverk, Ronny; Zhou, Jing; Hovland, Geir; Zhang, Houxiang (Peer reviewed; Journal article, 2020)Safe handling of heavy payloads in an offshore environment requires careful planning and depends on the interaction between a crane and a vessel. This paper investigates the coupled dynamics between a multipurpose crane ...