• UAV anti-icing system based on conductive coating 

      Helland, Andreas Strand (Master thesis, 2014)
      Icing on leading edge surfaces such as wings and propeller blades presents a major risk for UAVs operating in a cold and humid environment. Reducing or loss of manoeuvrability, loss of lift, increase in drag, reducing ...
    • UAV Fault-Tolerant Control by Combined L1 Adaptive Backstepping and Fault-dependent Control Allocation 

      Sørensen, Mikkel Eske Nørgaard; Breivik, Morten (Chapter; Conference object, 2015)
      This paper presents an approach to obtain fault tolerance in the nonlinear longitudinal motion control of an aircraft. The approach uses an L1 adaptive backstepping controller and fault-dependent control allocation to ...
    • UAV Icing: Ice Accretion Experiments and Validation 

      Hann, Richard (Journal article; Peer reviewed, 2019)
      Atmospheric icing is a key challenge to the operational envelope of medium-sized fixed-wing UAVs. Today, several numeric icing codes exist, that all have been developed for general aviation applications. UAVs with wingspans ...
    • UAV net landing system for marine operations 

      Bjørsvik, Bård Rørlien (Master thesis, 2017)
      This thesis presents an automatic landing system designed for a fixed-wing unmanned aerial vehicle (UAV) to land in a net placed on ta ship. The UAV used is a Skywalker X8, a cheap and durable airframe, with a Pixhawk as ...
    • UAV Path Planning for Ice Intelligence Purposes using NLP 

      Grimsland, Lars Arne (Master thesis, 2012)
      As the oil and shipping industry are interested in operating in arctic waters, the need for ice intelligence gathering is rising.The thesis describes the implentation and results of a path planning framework for an UAV ...
    • UAV Path Planning for Maximum-Information Sensing in Spatiotemporal Data Acquisition 

      Vibeto, Andreas Nordby (Master thesis, 2017)
      Fixed-wing Unmanned Aerial Vehicles are extensively used for ground observation, as they allow for effective and precise methods of collecting information. They do however, have a downside as the quality of the information ...
    • UAV path planning using MILP with experiments 

      Albert, Anders; Leira, Frederik Stendahl; Imsland, Lars Struen (Journal article; Peer reviewed, 2017)
      In this paper, we look at the problem of tracking icebergs using multiple Unmanned Aerial Vehicles (UAVs). Our solutions use combinatorial optimization for UAV path planning by formulating a mixed integer linear programing ...
    • UAV/UAS path planning for ice management information gathering 

      Stalmakou, Artsiom (Master thesis, 2011)
      The key objective of this work is the proposition of the path planning strategy for unmanned aerial vehicle (UAV) intended for information gathering in Arctic environments / ice-infested regions. Two different path planning ...
    • Ultra-Wide Band Real Time Location Systems: Practical Implementation and Performance Evaluation 

      Cisek, Krzysztof; Zolich, Artur Piotr; Klausen, Kristian; Johansen, Tor Arne (Chapter; Conference object, 2017)
      Several different methods can be used to determine the 3-dimensional position of an object. A common solution is use of Global Navigation Satellite System (GNSS). However, for some operation the specific characteristics ...
    • Ultra-wideband Aided Inertial Navigation of an Indoor Robot 

      Rørstad, Håkon Yssen (Master thesis, 2020)
      Denne oppgaven presenterer og diskuterer et innendørs navigasjonssystem somestimerer posisjonen og orientasjonen til en robot ved bruk av ultra-wideband(UWB) transcivere og en treghetsnavigasjonsenhet (IMU). Hovedfokuset ...
    • Ultrasound Based Localization and Quantification of Skeletal Muscle Contraction 

      Heger, Max (Master thesis, 2014)
      Earlier experiments indicates that motor unit activity during isometric contractions can be imaged using a high-definition ultrasound scanner. In this study, ultrasound raw-data is analysed in MATLAB to localize and quantify ...
    • Ultrasound Radiation Force for Increased Transport of Drugs in Cancer Tumors 

      Vea, Siri (Master thesis, 2014)
      Cancer is today one of the leading causes of death world wide. Chemotherapy is a cancer treatment where cytotoxic drugs are administered intravenously in order to kill the cancer cells. This is a therapy form which is ...
    • Ultrasound speckle reduction using generative adversial networks 

      Dietrichson, Fabian Sødal; Smistad, Erik; Østvik, Andreas; Løvstakken, Lasse (Journal article; Peer reviewed, 2018)
      Generative adversial networks (GANs) have shown its ability to create realistic and accurate image-to-image transformation. The goal of this work was to investigate whether deep convolutional GANs can learn to perform ...
    • Ultrasound Strain Rate Imaging of Individual Muscle Motor Units 

      Heger, Max; Stavdahl, Øyvind; Torp, Hans (Journal article; Peer reviewed, 2014)
      Skeletal muscle is organized in motor units, each comprising a motor neuron and all its connected muscle fibres. The arrival of an action potential (a neural “impulse”) causes the fibers to contract, they exhibit a twitch. ...
    • Ultrasound View Detection 

      Horejs, Jan (Master thesis, 2010)
      The goal of this project is to establish effective ultrasound view detection between apical, parasternal long axis and parasternal short axis view. The chosen approach in this project is to represent a shape of the cavity ...
    • Uncertainty estimation in autoregressive exogenous networks and nonlinear autoregressive exogenous neural networks 

      Eilertsen, Ingeborg Kristine (Master thesis, 2021)
      Autoregressive eksogene (ARX) nettverk og ikke-lineære autoregressive eksogene (NARX) nevrale nettverk er avhengige av et mål på usikkerhet hvis de skal brukes til sikkerhets kritiske oppgaver, der feil valg i det verste ...
    • Uncertainty Management in a Scenario-Based MPC for Collision Avoidance 

      Tengesdal, Trym (Master thesis, 2019)
      Eit robust antikollisjonssystem er viktig for å sørge for sikker styring av autonome overflatefartøy. Dette antikollisjonssystemet er avhengig av eit påliteleg målfølgingssystem for å halde styr på hindringar i nærleiken. ...
    • Underactuated leader-follower synchronisation for multi-agent systems with rejection of unknown disturbances 

      Belleter, Dennis Johannes Wouter; Pettersen, Kristin Ytterstad (Conference object; Journal article; Peer reviewed, 2015)
      In this paper leader-follower synchronization is considered for underactuated followers in an inhomogeneous multi-agent system. The goal is to synchronise the motion of a leader and an underactuated follower. Measurements ...
    • Underactuated mechanical systems: Whether orbital stabilization is an adequate assignment for a controller design? 

      Mamedov, Shamil; Khusainov, Ramil; Gusev, Sergey; Klimchik, Alexandr; Maloletov, Aleksandr; Shiriaev, Anton (Peer reviewed; Journal article, 2020)
      The paper contributes to developing algorithms for motion planning and motion control for mechanical systems with two and more passive degrees of freedom by exploring a challenging example in details. As shown, some of ...
    • Understanding Instantaneous frequency detection: A discussion of Hilbert-Huang Transform versus Wavelet Transform 

      Bueno-Lopez, Maximiliano; Molinas Cabrera, Maria Marta; Kulia, Geir (Chapter, 2017)
      Nonlinear and/or nonstationary properties have been observed in measurements coming from microgrids in modern power systems and biological systems. Generally, signals from these two domains are analyzed separately although ...