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Optimal Maintenance Scheduling for Washing of Compressors to Increase Operational Efficiency
(Peer reviewed; Journal article, 2019)The need for simultaneously decreasing carbon emissions and increasing operational profit motivates gas turbine and gas compressor operators to understand, minimize and control performance deterioration. Fouling is one of ... -
Optimal Management for Megawatt Level Electric Vehicle Charging Stations with a Grid Interface Based on Modular Multilevel Converter
(Peer reviewed; Journal article, 2021)This paper proposes a strategy to manage an electric vehicle charging station (EVCSs) with a grid-side interface based on a Modular Multilevel Converter (MMC). In such a system, heterogeneous behavior of electric vehicles ... -
Optimal Mission Planning for Fixed-Wing UAVs with Electro-Thermal Icing Protection and Hybrid-Electric Power Systems
(Chapter, 2020)Harsh weather conditions such as wind and icing are severe debilitators to the operations of unmanned aerial vehicles in terms of performance, safety and reliability. Forecasts of atmospheric parameters in the mission area ... -
Optimal Model-Based Trajectory Planning With Static Polygonal Constraints
(Peer reviewed; Journal article, 2021)The main contribution of this article is a novel method for planning globally optimal trajectories for dynamical systems subject to polygonal constraints. The proposed method is a hybrid trajectory planning approach, which ... -
Optimal motion compensation for suspended loads
(Master thesis, 2023)Offshore kranoperasjoner er ofte kritiske operasjoner under krevende forhold som krever mye av kranoperatøren. Dette gjør at behovet for teknologiske løsninger er svært høy. Svingende laster er en sikkerhetsbekymring som ... -
Optimal Operation of Wind Farms
(Master thesis, 2013)In this project we considered the wind farm operation planning to maximize the total power produced. The wind farm consisted of a row of three wind turbines. Two strategies were evaluated. The first strategy was the effect ... -
Optimal path following for underactuated marine vessels
(Master thesis, 2008)This report presents two optimization problems, where three cost-functions are suggested for each. The goal for the first optimization problem is to find a time variant look-ahead distance which improves the performance ... -
Optimal Path of a UAV Engaged in Wind-influenced Circular Towing
(Chapter; Peer reviewed, 2017)This paper considers the dynamic optimization of the planned path for an Unmanned Aerial Vehicle (UAV) engaged in circular towing of a cable-body system, such that the motion of the towed endmass is stabilized with minimum ... -
Optimal Path Planning for a Mobile Drilling Robot
(Master thesis, 2021) -
Optimal Path Planning for AUV Control
(Master thesis, 2009)The focus of this project is on the problem of path planning. The project consists of the following assignments. Given initial and final positions and orientations of an AUV, one needs to find a spatial, feasible path ... -
Optimal Path Planning for Unmanned Aerial Systems
(Master thesis, 2012)This thesis is a contribution to the Unmanned Aerial Vehicle (UAV) project at the Department of Engineering Cybernetics, which is a project where contributions from master students and Phd students will result in an ... -
Optimal Positioning of Snake Robots in Vortex Wakes using Extremum-Seeking Control.
(Peer reviewed; Journal article, 2023)In this paper we explore the optimal positioning of an underwater snake robot (USR) for energy harvesting in the wake of a bluff body. The USR and fluid are simulated jointly using a coupled vortex particle-mesh method and ... -
Optimal production and maintenance scheduling for a multiproduct batch plant considering degradation
(Peer reviewed; Journal article, 2020)Performance decay due to asset degradation is an important constraint in industrial production and therefore needs to be actively considered. This paper focuses on short-term scheduling for multiproduct batch processes ... -
Optimal Reservoir control using nonlinear MPC and ECLIPSE
(Master thesis, 2007)Recent years advances within well deployment and instrumentation technology offers huge potentials for increased oil recovery from reservoir production. Wells can now be equipped with controllable valves at reservoir depth, ... -
Optimal Shaping of the MMC Circulating Currents for Preventing AC-side Power Oscillations from Propagating into HVDC Grids
(Journal article; Peer reviewed, 2019)A constrained optimization problem based on the Lagrange multipliers method is formulated to derive the circulating current references of Modular Multilevel Converters (MMC) directly in abc coordinates. The resulting ... -
Optimal Sizing of Energy Storage Systems for Shipboard Applications
(Journal article; Peer reviewed, 2018)The recent worldwide effort on the environmental issue has led to new regulations on greenhouse gases emissions (GHG), both for land and marine applications. Nowadays, the extensive electrification of transportation systems ... -
Optimal Throwing Motion of Three-Link Underactuated Robot: A Study of Virtual Holonomic Constraints
(Master thesis, 2014)Control design for weakly or underactuated systems, i.e. more degrees of freedom than number of control inputs available, has proven to be much more complex than fully actuated due to the new constraints it impose. This ... -
Optimal Thrust Allocation for Dynamic Positioning Systems using Mixed Integer Linear Programming
(Master thesis, 2015)Thrust allocation is the part in a dynamic positioning system that is responsible for giving set-points to the different actuators on a vessel in order to track a desired generalized force, which is the set of surge, sway ... -
Optimal trajectory planning for robotized tiling of floors
(Master thesis, 2013)This thesis describes the strategy of a new approach for automated tilesetting currently under development by nLink AS in Sogndal. The main focus of the thesis is the development of an appropriate strategy for path planning ...