• DC-DC Converter For Fuel Cell (Control Strategy, Voltage Curve, Optimization, Converter Type). Current-fed Full-bridge Isolated DC-DC Converter With An Active Clamp Circuit For Fuel Cell Application 

      Shojaee, Sanaz (Master thesis; Mastergradsoppgave, 2022-05-15)
      This thesis investigates one of the most favorable converters for integrating fuel cells into a DC microgrid. A current-fed full-bridge isolated DC-DC converter has advantages such as high voltage conversion ratio, low switches’ losses, and low input current ripple which make it one of the best choices for Fuel cells (FC). This converter transfer power to the load through the leakage inductance which ...
    • A Decoupled Approach for Flight Control 

      Oland, Espen; Kristiansen, Raymond (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      A decoupling method for flight control is presented that greatly simplifies the controller design. By approximating the higher order derivatives of the angle of attack and sideslip, it enables a rotation controller and a speed controller to be derived independently of each other, and thus gives access to a vast number of controller solutions derived for general classes of rotational and translational ...
    • Deep Adaptive Ensemble Filter for Non-Intrusive Residential Load Monitoring 

      Kianpoor, Nasrin; Hoff, Bjarte; Østrem, Trond (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-10)
      Identifying flexible loads, such as a heat pump, has an essential role in a home energy management system. In this study, an adaptive ensemble filtering framework integrated with long short-term memory (LSTM) is proposed for identifying flexible loads. The proposed framework, called AEFLSTM, takes advantage of filtering techniques and the representational power of LSTM for load disaggregation by ...
    • Design and construction of a half-bridge using wide-bandgap transistors 

      Vatshelle, Fredrik Hausvik (Master thesis; Mastergradsoppgave, 2019-06-28)
      A continuously increasing demand of electric power makes energy efficiency imperative in modern technology. The transistor is considered as the fundamental element of modern electronic products.
    • Design av dekksmontert knekk-kran 

      Eilertsen, Stian Schultz (Master thesis; Mastergradsoppgave, 2016-11-01)
      Oppgavens hensikt var å designe en kran som skulle være klar til produksjon når prosjektet ferdigstilles. Under prosjekteringen skulle alle aspekter av krandesignet undersøkes. Kranen skulle arktifiseres, dette vil si gjøres klar for en arktiskmaritim vinter. Alle komponenter ble designet med en minimum sikkerhetsfaktor på 1.33, dog har de aller fleste komponentene en høyere sikkerhetsfaktor. Den ...
    • Design Considerations of Capacitive Power Transfer Systems 

      Al-Sallami, Hussein Mahdi Yaseen; Hattori, Reiji; Hoff, Bjarte; Uezu, Anyu; Akiyoshi, Katsumi (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-07)
      Capacitive power transfer (CPT) is a near-field wireless power transfer (WPT) technology that has attracted attention in different charging applications. By utilizing electric fields, CPT gives charging systems advantages in terms of cost, weight, flexibility, and mobility. This paper surveys a number of empirical published works in a period between 2015 and 2023. Additionally, it discusses theoretical ...
    • Designing a lifting and lowering device to the storage market 

      Hoff, Even (Master thesis; Mastergradsoppgave, 2017-06-15)
      "The aim of this thesis is to design a lifting and lowering device for the storage market. The design is based on a patent, held by Dropracks, which is a collaborator in the thesis. Dropracks is a company developing a lowerable roof rack for cars. This rack is protected by their patent of a lifting and lowering device. This patent gives Dropracks an immaterial protection in all industry sectors, and ...
    • Designing an Autonomous Racing Drone 

      Trældal, Alexander (Master thesis; Mastergradsoppgave, 2021-05-19)
      In recent years drone racing using human pilots have increased in popularity. This combined with the increased usage of autonomous driving vehicles have sparked a new field of interest which is Autonomous Racing Drones competitions. This thesis explores the field of drone design and avionics with the conclusion of presenting the first Racing Drone prototype that can be used in future work made by ...
    • Designing and Implementation of grid-connected separately excited DC Machine 

      Haruna, Muhammad (Master thesis; Mastergradsoppgave, 2023-05-22)
      This thesis presents the design and implementation of SEDC machine which was located at machine laboratory in UiT Narvik campus. To improve the efficiency and to have automatic control, the old passive control needs to be replaced with DC-DC converters based active control method. This thesis explores various DC-DC and grid connected converter with the goal to find a suitable and most efficient for ...
    • Digital Controller Design and Implementation for AC and DC Side of 3ph qZSI 

      Agrawal, Shwetank; Tyagi, Barjeev; Kumar, Vishal; Sharma, Pawan (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-28)
      This article presents the multi-loop digital controller design of a quasi-z-source inverter (qZSI). The qZSI is a single-stage power converter and can operate in buck and boost modes. The qZSI is an economical solution for distributed generation and eliminates the need for two-stage power conversion. This article proposes a detailed step-wise digital controller design using a multi-loop control ...
    • Digitalization of the power business: How to make this work? 

      Svendsen, Arne Brufladt; Tollefsen, Trond; Gjengedal, Terje; Goodwin, Morten; Antonsen, Stian (Peer reviewed; Bokkapittel; Book; Bok; Chapter, 2018)
      As a result of the digitalization of the power business in Norway and Europa, a lot of new possibilities and challenges arise. In 2014 an expert committee one outlined a proposal for the future grid company structure in Norway (Reiten, 2014). In addition, new technologies are being implemented in the system. Wind power, solar power, un-regulated small hydro power production, battery storage domestic ...
    • Dual quaternion control: a review of recent results within motion control 

      Johansen, Tor-Aleksander; Sánchez, José J.; Kristiansen, Raymond (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-24)
      This paper presents a review of recent results in the field of dual quaternion based motion control. In addition, we derive two control laws for trajectory tracking control of a fully actuated rigid-body based on the resemblance of dual quaternion kinematics and dynamics to the quaternion based rotational kinematics and dynamics. A velocity error sliding surface and an integrator backstepping ...
    • Dual-quaternion backstepping control for a fully-actuated rigid-body 

      Andersen, Tom Stian; Johansen, Tor-Aleksander; Kristiansen, Raymond (Peer reviewed; Book; Chapter, 2018-08-16)
      In this paper dual-quaternions are used to model a fully actuated rigid-body. A backstepping-controller that solves the trajectory tracking problem is derived and proved to provide uniform asymptotical stabilization of the error dynamics. Numerical simulations are provided where the controller is compared to existing dual-quaternion tracking controllers and it is shown to have similar performance.
    • Duct fanned shielding design for quadrotors 

      Balakrishnan, Sethuram (Master thesis; Mastergradsoppgave, 2016-11-01)
      The master thesis work involved the design implementation of a duct fanned shielding for Quadrotors. This included the investigation of various settings for duct shielding and to identify the best possible option to safe guard propellers of the quadrotor. In addition, the work focused on improving the aerodynamic efficiency, reducing the mass of flight and the use of quadrotors in the arctic ...
    • Effect of placement of PMUs on state estimation in a power system 

      Mironov, Iurii (Master thesis; Mastergradsoppgave, 2016-11-07)
      State estimation is one of the most important processes in modelling and monitoring of a power system. Iterative and less accurate conventional means of estimation are now being replaced by fast and direct state vector measurements provided by PMUs. However, the high cost of PMUs forces engineers to choose wisely where the measurement units should be placed. The given project observes different ...
    • Efficient customizable tools for big data processing. Incoherent scatter radar big data as a case study 

      Trieu Thanh, Huy (Master thesis; Mastergradsoppgave, 2016-04-06)
      This project is my master diploma project of the department of Computer Science at Norks Arktisk Universitet (UiT) in 2016. Every day, the satellites send to the ground stations huge amount of data for processing. Incoherent Scatter Radar (ISR) is a very interesting technology in the space science and it also sends a large amount of data in plasma line data back to the earth. Currently, the space ...
    • Electric Ships in Norway - Experiences and Future trends. 

      Hoff, Bjarte (Conference object; Konferansebidrag, 2020)
    • Elektrifiering av hamna 

      Hoff, Bjarte (Conference object; Konferansebidrag, 2020)
    • En tematisk analyse av hva ingeniørstudenter gjør når de lærer lineær algebra 

      Rensaa, Ragnhild Johanne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-15)
      Denne artikkelen diskuterer hva ingeniørstudenter gjør når de lærer lineær algebra. Arbeidet inngår i et pågående forskningsprosjekt om læring, og grunnlagsdataene for artikkelen ble samlet inn ved at studentene besvarte et obligatorisk spørreskjema der spørsmålet om hva de gjør når de lærer lineær algebra, ble stilt som et åpent spørsmål. Dataene representerer derfor studentenes egne ord om hva de ...
    • Energy Conversion and Control of Hydrogen Fuel Cell Based Electric Transport 

      Subedi, Jhalak Nath (Master thesis; Mastergradsoppgave, 2023-05-22)
      The research investigates the effective utilization of hydrogen fuel cells in electric transport applications, addressing the challenges associated with power generation, energy storage, and control. By implementing the MPPT Perturb and Observe (P&O) technique, the thesis aims to optimize the power output of the fuel cell system, ensuring maximum efficiency and performance. To enhance the overall ...