• Detection and Trcking of Floating Objects using UAVs with Optical Sensors 

  Helgesen, Håkon Hagen (Doctoral theses at NTNU;2019:373, Doctoral thesis, 2019)

  This thesis focuses on detection and tracking of floating objects using fixed-wing unmanned aerial vehicles (UAVs) equipped with a monocular thermal camera. UAVs with optical sensors are useful in a vast number of applications ...

• Time-Invariant State-Space model of an AC Cable by dq-representation of Frequency-Dependent π-sections 

  D'Arco, Salvatore; Suul, Jon Are Wold; Beerten, Jef (Chapter, 2019)

  This paper introduces an approach for frequency-dependent pi-section (FD- π) modelling of ac cables which enables a time-invariant state-space representation that accounts for the frequency-dependent cable characteristics. ...

• Short-term Scheduling of a Multipurpose Batch Plant Considering Degradation Effects 

  Wu, Ouyang; Dalle Ave, Giancarlo; Harjunkoski, Iiro; Imsland, Lars Struen; Schneider, Stefan M; Bouaswaig, Ala EF; Roth, Matthias (Journal article; Peer reviewed, 2019)

  Fouling is a typical type of degradation in the process industries, which results in significant negative effects on the efficiency of plants. This paper considers a case study, where production tasks with different recipes ...

• Design of Solar Measurement IoT Node Using LPWAN 

  Apeland, Tore Mattias (Master thesis, 2019)

  I denne oppgaven ønsker vi å utvikle en embedded plattform basert på lavenergi nettverksteknologiene LoRa og NB-IoT. Enheten skal være i stand til å rapportere potensiell solenergiproduksjon til en sentral server. Det er ...

• Digital Twin: Values, Challenges and Enablers from a modelling perspective 

  Rasheed, Adil; San, Omer; Kvamsdal, Trond (Journal article; Peer reviewed, 2020)

  Digital twin can be defined as a virtual representation of a physical asset enabled through data and simulators for real-time prediction, optimization, monitoring, controlling, and improved decision making. Recent advances ...

• Probeless non-invasive near-infrared spectroscopic bioprocess monitoring using microspectrometer technology 

  Zimmerleiter, Robert; Kager, Julian; Nikzad-Langerodi, Ramin; Berezhinskiy, Vladimir; Westad, Frank Ove; Herwig, Christoph; Brandstetter, Markus (Journal article; Peer reviewed, 2019)

  Real-time measurements and adjustments of critical process parameters are essential for the precise control of fermentation processes and thus for increasing both quality and yield of the desired product. However, the ...

• Hybrid Collision Avoidance for ASVs Compliant with COLREGs Rules 8 and 13-17 

  Eriksen, Bjørn-Olav Holtung; Bitar, Glenn Ivan; Breivik, Morten; Lekkas, Anastasios M. (Journal article; Peer reviewed, 2020)

  This paper presents a three-layered hybrid collision avoidance (COLAV) system for autonomous surface vehicles, compliant with rules 8 and 13–17 of the International Regulations for Preventing Collisions at Sea (COLREGs). ...

• Pilot study of Early Meal Onset Detection from Abdominal Sounds 

  Setti, Sunilkumar Telagam; Søiland, Elise; Stavdahl, Øyvind; Fougner, Anders Lyngvi (Chapter, 2019)

  A typical artificial pancreas depends only on the continuous glucose monitoring (CGM) value for insulin dosing. However, both the insulin infusion and the glucose sensing are subject to time delays and slow dynamics. An ...

• Impact of Virtual Oscillator Control on the instantaneous properties of VSC output voltage in distorted island grids 

  Melby, Mathias; Fosso, Olav B; Molinas Cabrera, Maria Marta (Chapter, 2019)

  This paper investigates the instantaneous properties of voltage and frequency of Voltage Source Converters (VSCs) when they are controlled by Virtual Oscillator Controllers (VOC) in a distorted island grid. Under time-averaged ...

• Frequency Domain Modelling for Assessment of Hilbert and SOGI Based Single-Phase Synchronisation 

  Føyen, Sjur; Fosso, Olav B; Zhang, Chen; Molinas Cabrera, Maria Marta (Chapter, 2019)

  Two different single-phase synchronisation schemes based on orthogonal system generation (OSG) are modelled in the linear, time-periodic framework. The frequency adaptive Hilbert phase locked loop (PLL) and the frequency-fixed ...

• Autonomous unmanned aerial vehicles in search and rescue missions using real-time cooperative model predictive control 

  de Alcantara Andrade, Fabio Augusto; Hovenburg, Anthony Reinier; Netto de Lima, Luciano; Dahlin Rodin, Christopher; Johansen, Tor Arne; Storvold, Rune; Moraes Correia, Carlos Alberto; Barreto Haddad, Diego (Journal article; Peer reviewed, 2019)

  Unmanned Aerial Vehicles (UAVs) have recently been used in a wide variety of applications due to their versatility, reduced cost, rapid deployment, among other advantages. Search and Rescue (SAR) is one of the most prominent ...

• A Data-driven Approach to Grid Impedance : Identification for Impedance-based Stability Analysis under Different Frequency Ranges 

  Li, Chendan; Molinas Cabrera, Maria Marta; Fosso, Olav B; Qin, Nan; Zhu, Lin (Chapter, 2019)

  The instability caused by inappropriate damping design of grid-connected converters under specific grid impedance makes the grid impedance estimation a crucial issue. To guide the system controller design toward a stable ...

• Bruk av droner i nordområdene 

  Bakken, Trond; Johnsen, Stig Ole; Holmstrøm, Sture; Merz, Mariann; Transeth, Aksel Andreas; Grøtli, Esten Ingar; Risholm, Petter; Storvold, Rune (Research report, 2019)

  Formålet med denne rapporten er å vise eksempler på bruk av fjernstyrte og autonome droner i petroleumssektoren og vise hvilke utviklingstrender innen droneteknologi som er viktige. Utfordringer og muligheter for bruk av ...

• Comparative Eigenvalue Analysis of Synchronous Machine Emulations and Synchronous Machines 

  Unamuno, Eneko; Suul, Jon Are Wold; Molinas Cabrera, Maria Marta; Barrena, Jon Andoni (Chapter, 2019)

  This paper presents a comparative eigenvalue analysis of the stability characteristics and small signal dynamics of four different control strategies for Synchronous Machine Emulation (SME) by power electronic converters, ...

• Techno-Economic Evaluation of the Sizing and Operation of Battery Storage for Isolated Oil and Gas Platforms with High Wind Power Penetration 

  Chapaloglou, Spyridon; Varagnolo, Damiano; Tedeschi, Elisabetta (Chapter, 2019)

  According to the plans of one of the global oil and gas (O&G) industry leaders, the integration of offshore wind power into offshore O&G platforms will become reality within the next three years. Although this implementation ...

• Modified sequence domain impedance modelling of the modular multilevel converter 

  Zong, Haoxiang; Lyu, Jing; Zhang, Chen; Molinas Cabrera, Maria Marta; Cai, Xu; Rao, Fangquan (Chapter, 2019)

  The accurate sequence impedance model of the modular multilevel converter (MMC) is essential for the precise stability analysis of various MMC-based interconnected systems. This paper presents a modified sequence impedance ...

• Mimo impedance based stability analysis of DFIG-based wind farm with MMC-HVDC in modifed sequence domain 

  Zong, Haoxiang; Lyu, Jing; Zhang, Chen; Cai, Xu; Molinas Cabrera, Maria Marta; Rao, Fangquan (Chapter, 2019)

  The modular multilevel converter (MMC) based high-voltage direct current (HVDC) transmission is widely applied for the large-scale wind farm integration making its interaction stability analysis especially significant. ...

• Economic model predictive control for snake robot locomotion 

  Nonhoff, Marko; köhler, philipp; Kohl, Anna M; Pettersen, Kristin Ytterstad; Allgower, Frank (Journal article; Peer reviewed, 2019)

  Abstract— In this work, the control of snake robot loco-motion via economic model predictive control (MPC) is studied.Only very few examples of applications of MPC to snake robotsexist and rigorous proofs for recursive ...

• Understanding the Nonlinear Behaviour and Synchronizing Stability of a Grid-Tied VSC Under Grid Voltage Sags 

  Zhang, Chen; Molinas Cabrera, Maria Marta; Lyu, Jing; Zong, Haoxiang; Cai, Xu (Chapter, 2019)

  Transients of a typical grid synchronizing VSC are closely associated with the over-current and over-voltage in circuits. Previous analysis in evaluating such transient phenomenon usually ignore the nonlinear control effects ...

• Advanced Maintainence Planning and Scheduling for Engineering Asset Fleets: A Compressor Case Study 

  Spüntrup, Frederik Schulze (Doctoral theses at NTNU;2019:232, Doctoral thesis, 2019)

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