Now showing items 21-40 of 2127

    • Model predictive control of offshore wind turbine 

      Skibelid, Adrian B. (Master thesis, 2019)
      Arbeidet presentert i denne oppgaven utvikler en Model Predictive Control (MPC) kontroller for STAS, SINTEF sin simulator for offshore vindturbiner. STAS er en simulator i frekvensdomenet som ikke er optimert for tidssimulering. ...
    • Hybrid collision avoidance for autonomous passenger ferries 

      Uttisrud, Anette (Master thesis, 2020)
      Den pågående urbaniseringen stiller økende krav til bærekraftig passasjertransport i byene. Elektriske autonome passasjerferger tilbyr en grønn og tilpasningsdyktig transportløsning som enkelt kan integreres i urbane ...
    • Response Amplitude Operator Estimation and Prediction of Heave Motions 

      Vettestad, Mia Olea (Master thesis, 2020)
      Å bore etter olje fra flytende plattformer er ofte assosiert med store utfordringer, særlig relatert til vær- og vindforhold. Under boreoperasjonen er boreplattformen hiv-kompensert ved hjelp av et system som holder ...
    • Trajectory Planning for Fixed-wing Unmanned Aerial Vehicles in Real World Terrain Data 

      Bendik Stuevold Eger (Master thesis, 2020)
      Denne oppgaven presenterer en implementasjon av en system i stand til å planlegge fly-lignende baner i realistisk terreng data ment for inspeksjon av radiomaster og strømnettverk via «fixed wing»-drone. Et bidrag til ...
    • Monocular Visual Odometry for Underwater Navigation 

      Eriksen, Erlend Nodeland (Master thesis, 2020)
      I denne masteroppgaven foreslår vi en visuell odometri algorime for undervannsnavigasjon ved hjelp av et monokulært kamera. Vi dekker de matematiske konseptene som trengs for å estimere kamerabevegelse fra påafølgende ...
    • Harmonic-Domain SISO Equivalent Impedance Modeling and Stability Analysis of a Single-Phase Grid-Connected VSC 

      Zhang, Chen; Molinas Cabrera, Maria Marta; Føyen, Sjur; Suul, Jon Are Wold; Isobe, Takanori (Peer reviewed; Journal article, 2020)
      This article presents a harmonic-domain single-input single-output (SISO) equivalent modeling technique for the impedance modeling and stability analysis of a single-phase grid-connected voltage-source converter (VSC). The ...
    • Stochastic data-driven model predictive control using gaussian processes 

      Bradford, Eric; Imsland, Lars Struen; Zhang, Dongda; Chanona del Rio, Ehecatl Antonio (Peer reviewed; Journal article, 2020)
      Nonlinear model predictive control (NMPC) is one of the few control methods that can handle multivariable nonlinear control systems with constraints. Gaussian processes (GPs) present a powerful tool to identify the required ...
    • Experimental and numerical icing penalties of an S826 airfoil at low Reynolds numbers 

      Hann, Richard; Hearst, R. Jason; Sætran, Lars Roar; Bracchi, Tania (Peer reviewed; Journal article, 2020)
      Most icing research focuses on the high Reynolds number regime and manned aviation. Information on icing at low Reynolds numbers, as it is encountered by wind turbines and unmanned aerial vehicles, is less available, and ...
    • Pressure and inertia sensing drifters for glacial hydrology flow path measurements 

      Alexander, Andreas; Kruusmaa, Maarja; Tuhtan, Jeffrey; Hodson, Andrew; Schuler, Thomas; Kääb, Andreas (Peer reviewed; Journal article, 2020)
      Glacial hydrology plays an important role in the control of glacier dynamics, of sediment transport, and of fjord and proglacial ecosystems. Surface meltwater drains through glaciers via supraglacial, englacial and subglacial ...
    • Analyzing the Recognition of Color Exposure and Imagined Color from EEG Signals 

      Torres-García, Alejandro Antonio; Molinas Cabrera, Maria Marta (Chapter, 2019)
      The most widely used visual brain-computer interfaces (BCIs) are based on flickering stimulators. It remains unclear whether a passive visual stimulator could be used. Colors are an integral part of everyday life. We ...
    • Microgrid design: sensitivity on models and parameters 

      Corigliano, Silvia; Mocecchi, Matteo; Mirbagheri, Mina; Merlo, Marco; Molinas Cabrera, Maria Marta (Chapter, 2019)
      Designing off-grid systems in developing countries is not a trivial task; unpredictable energy sources and uncertain load demands have to match in a seamless solution, providing the most favourable conditions in terms of ...
    • Review of advanced physical and data‐driven models for dynamic bioprocess simulation: Case study of algae–bacteria consortium wastewater treatment 

      del Rio-Chanona, Ehecatl Antonio; Cong, Xiaoying; Bradford, Eric; Zhang, Dongda; Jing, Keju (Peer reviewed; Journal article, 2019)
      Microorganism production and remediation processes are of critical importance to the next generation of sustainable industries. Undertaking mathematical treatment of dynamic biosystems operating at any spatial or temporal ...
    • Event-related potential from EEG for a two-step Identity Authentication System 

      Moctezuma, Luis Alfredo; Molinas Cabrera, Maria Marta (Peer reviewed; Journal article, 2019)
      Current problems related to high-level security access are increasing, leaving organizations and persons unsafe. A recent good candidate to create a robust identity authentication system is based on brain signals recorded ...
    • Experimental validation of attitude and rate-sensor bias filter using range-difference measurements 

      Jørgensen, Erlend Kvinge; Fossen, Thor I.; Schjølberg, Ingrid; Esperanca, Paulo TT (Peer reviewed; Journal article, 2018)
      This paper considers the problem of constructing a filter for estimating attitude and rate-sensor bias, that has both proven stability and close-to-optimal performance with respect to noise. The filter is based on measuring ...
    • Mathematical programming formulations for piecewise polynomial functions 

      Grimstad, Bjarne Andre; Knudsen, Brage Rugstad (Journal article; Peer reviewed, 2020)
      This paper studies mathematical programming formulations for solving optimization problems with piecewise polynomial (PWP) constraints. We elaborate on suitable polynomial bases as a means of efficiently representing PWPs ...
    • Stochastic nonlinear model predictive control for chemical batch processes 

      Bradford, Eric (Doctoral theses at NTNU;2020:132, Doctoral thesis, 2020)
      The chemical industry is a vital part of the world economy transforming raw materials into crucial intermediary products. Batch processes are common in many sectors of the chemical industry, which are gaining in importance ...
    • Multiscale modelling of cage effects on the transport of effluents from open aquaculture systems 

      Broch, Ole Jacob; Pascal, Klebert; Michelsen, Finn Are; Alver, Morten (Peer reviewed; Journal article, 2020)
      Most Atlantic salmon mariculture operations use open sea cages for the grow out phase. The ultimate fate and effects of the effluents and the possibilities of disease transfer between fish farms are major concerns for ...
    • Sensor Combinations in Heterogeneous Multi-sensor Fusion for Maritime Target Tracking 

      Helgesen, Øystein Kaarstad; Brekke, Edmund Førland; Helgesen, Håkon Hagen; Engelhardtsen, Øystein (Chapter, 2019)
      Safe navigation for autonomous surface vehicles requires a robust and reliable tracking system that maintains and estimates position and velocity of other vessels. This paper demonstrates a measurement level sensor fusion ...
    • Estimation of Target Detectability for Maritime Target Tracking in the PDA Framework 

      Wilthil, Erik Falmår; Bar-Shalom, Yaakov; Willett, Peter; Brekke, Edmund Førland (Chapter, 2019)
      Abstract—The detection probability of maritime vessels may change over time, either slowly or more abruptly, due to effects such as sea state and varying aspect angle. If the varying detectability is not accounted for in ...
    • Aplicación de la Transformada de Hilbert-Huang en el Análisis de Señales de Comunicación Satelital 

      Villanueva Maldonado, Juvenal; Bueno Lopez, Maximiliano; Rodriguez, Jorge Simon; Molinas Cabrera, Maria Marta; Flores Troncoso, Jorge; Mendez Monroy, Paul Erick (Journal article; Peer Reviewed, 2019)
      In communication links between satellites and ground stations, the transmitted signal is exposed to disturbances such as noise of different types that hinder reception or retrieval of information. For that reason, different ...