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    • Optimization of transfer efficiency of a dynamic wireless charging system for electric vehicles 

      Khalaf, Alaa (Master thesis, 2020)
      A scaled down truck model equipped with a wireless dynamic charging system was the main platform for development, in this study. The goal was to enhance the efficiency of the power transfer from the road-way coil to the ...

    • Optimization of water-borne crude oil transport 

      Vatn, Karsten Dånmark (Master thesis, 2007)
      A ship scheduling problem in optimization of water-borne crude oil transportation has been investigated. The classic optimization problem the most closely related to the problem at hand is the Multi-Vehicle-Pick-up-and-Delivery ...

    • Optimization-Based Automatic Docking and Berthing of ASVs Using Exteroceptive Sensors: Theory and Experiments 

      Martinsen, Andreas Bell; Bitar, Glenn Ivan; Lekkas, Anastasios M.; Gros, Sebastien (Peer reviewed; Journal article, 2020)
      Docking of autonomous surface vehicles (ASVs) involves intricate maneuvering at low speeds under the influence of unknown environmental forces, and is often a challenging operation even for experienced helmsmen. In this ...

    • Optimization-based Control in Shipboard Electric Systems 

      Skjong, Espen (Doctoral theses at NTNU;2017:139, Doctoral thesis, 2017)
      With stringent, and globally sanctioned, environmental rules and regulations, dictating limits for allowed emissions of greenhouse gases and particle matter from combustion of fossil fuels, the marine vessel’s efficiency ...

    • Optimization-based control of diesel-electric ships in dynamic positioning 

      Veksler, Aleksander (Doktoravhandlinger ved NTNU, 1503-8181; 2014:302, Doctoral thesis, 2014)
      Recent advances in computer hardware and algorithms make it possible to consider more computationally demanding control methods, allowing more effective exploitation of the equipment under control. This thesis explores ...

    • Optimization-based motion planning for trawling 

      Haugen, Joakim; Imsland, Lars Struen (Journal article; Peer reviewed, 2018)
      This work presents an optimization-based motion planning system for trawling operations. The formulation makes use of simplistic physical descriptions of the vessel and fishing gear together with catch dynamics of sweeping ...

    • Optimization-based Planning and Control for Autonomous Surface Vehicles 

      Martinsen, Andreas Bell (Doctoral theses at NTNU;2021:164, Doctoral thesis, 2021)
      With autonomy offering a number of benefits in robotics applications, such as increased safety, better consistency and reliability, reduced environmental impact and higher efficiency, it is not surprising that the topic ...

    • Optimization-based Trajectory Planning and Automatic Docking for Autonomous Ferries 

      Bitar, Glenn (Doctoral theses at NTNU;2021:79, Doctoral thesis, 2021)
      This Ph.D. thesis presents developments towards energy-optimized trajectory planning and automatic docking for surface vessels. It comprises eight peer-reviewed research papers, in addition to the introductory chapters ...

    • Optimized Allocation of Loads in MMC-based Electric Vehicle Charging Infrastructure 

      Gümrükcü, Erdem; Ponci, Ferdinanda; Monti, Antonello; Guidi, Giuseppe; D'Arco, Salvatore; Suul, Jon Are Wold (Chapter, 2020)
      Utilization of the modular multilevel converter (MMC) topology can enable transformer-less interfacing between electric vehicle (EV) charging infrastructure and the power distribution grid. Such configurations are claimed ...

    • Optimized current reference generation for system-level harmonic mitigation in a diesel-electric ship using non-linear model predictive control 

      Skjong, Espen; Molinas Cabrera, Maria Marta; Johansen, Tor Arne (IEEE International Conference on Industrial Technology (ICIT) 2015;, Chapter, 2015)
      Non-linear optimal control using collocation and multiple shooting is investigated in this paper to generate the current reference signal for the lower level control of an active filter in a marine vessel with diesel-electric ...

    • Optimizing Order to Minimize Low-Pass Filter Lag 

      Dessen, Fredrik (Journal article; Peer reviewed, 2018)
      This paper develops a tool kit for designing low-pass filters to exhibit the smallest possible phase drop. Based solely on the stopband requirements, it is thus possible to find the best order for a filter to be employed ...

    • Optimizing separator pressure in a multistage crude oil production plant 

      Kylling, Øyvind Widerøe (Master thesis, 2009)
      This thesis contains a steady state simulation model of a multistage crude oil production plant. The unstable reservoir fluid is separated into crude oil and gas in a three stage gas oil separation plant. Peng Robinson ...

    • Optimizing Transmit Sequence for Ultrafast Ultrasound Imaging 

      Ravn, Sondre Strand (Master thesis, 2017)
      A simulation tool developed for estimating the acoustic properties of different transmit beams and sequences, based on FieldSim and the linear simulator Field2, is presented. For defocused and unfocused beams, some ...

    • Optisk positurestimering for bevegelse i 5 frihetsgrader 

      Fjerdingen, Sigurd Aksnes (Master thesis, 2007)
      Fjerdingen fremla i 2006 en løsningsmetode for kamerabasert absolutt posisjonering for tre frihetsgrader, ved bruk av et referansemønster. Denne rapporten presenterer en løsningsmetode for fem frihetsgrader med tilsvarende ...

    • Orbital Stabilization of Nonlinear Underactuated Systems 

      Sætre, Christian Fredrik (Doctoral theses at NTNU;2022:353, Doctoral thesis, 2022)
      Orbital stabilization is a particular form of set stabilization, where the control objective is to induce, via time-invariant state-feedback, an asymptotically stable orbit in the resulting closed-loop system. Here an orbit ...

    • Oscillation analysis of low-voltage distribution systems with high penetration of photovoltaic generation 

      Bueno Lopez, Maximiliano; Sanabria-Villamizar, Mauricio; Molinas Cabrera, Maria Marta; Bernal-Alzate, Efrain (Peer reviewed; Journal article, 2020)
      The use of renewable power generation brings new challenges related to power quality issues. Furthermore, with the changing power system nature due to the presence of new components such as power electronics in large numbers ...

    • OT and IT-architecture -functionality and design for health 4.0 

      Tobiesen Ådne (Master thesis, 2020)
      Ved datainnsamling må dataene leveres i et format som er lesbart for både menneske og maskin. Med økt datamengde i helse fra forskjellige systemer, er både datakvalitet en viktig parameter for å videreformidle informasjonen Denne ...

    • Outdoor Navigation Using Bluetooth Angle-of-Arrival Measurements 

      Sollie, Martin Lysvand; Gryte, Kristoffer; Bryne, Torleiv Håland; Johansen, Tor Arne (Journal article; Peer reviewed, 2022)

    • Outlier Rejection for GNSS-aided Inertial Navigation 

      Skaalerud, Yngve (Master thesis, 2017)
      Motivated by the importance of accurate measurements in navigation-applications, this thesis presents the implementation of an algorithm utilizing the estimated uncertainty from a Kalman filter to determine the quality of ...

    • Outline of a System for Integrated Adaptive Ice Tracking and Multi-Agent Path Planning 

      Olofsson, Jonatan; Veibäck, Clas; Hendeby, Gustaf; Johansen, Tor Arne (Chapter; Peer reviewed, 2017)
      In polar region operations, drift sea ice positioning and tracking is useful for both scientific and safety reasons. Modeling ice movements has proven difficult, not least due to the lack of information of currents and ...