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Extending a derivative-free model-based trust-region optimization algorithm to account for constraints and partial gradient information - Application to oil field development
(Master thesis, 2018)This master's thesis is motivated by the oil field development challenge. This is a very big and complicated task and only one part of it will be in focus, namely, the well placement challenge. When planning a new oil field ... -
Extracting Mapped Hazards from Electronic Navigational Charts for ASV Collision Avoidance
(Master thesis, 2019)Det finnes mange Elektroniske Navigasjonskart med detaljert beskrivelse om det maritime miljøet tilgjengelig idag. Disse kartene er laget av hydrografiske kontorer, hvor de følger et standardisert format som gjør det mulig ... -
Extremum seeking for real-time optimal drilling control
(Peer reviewed; Journal article, 2019)This paper demonstrate the feasibility and illustrates some challenges of applying extremum seeking control to online optimization of the drilling process. Specifically, we consider the problem of finding the hook-load ... -
Extremum-Seeking Control for Harmonic Mitigation in Electrical Grids of Marine Vessels
(Journal article; Peer reviewed, 2019)This paper focuses on the minimization of the harmonic distortion in multibus electrical grids of marine vessels using a single active power filter. An active power filter is commonly used for local harmonic mitigation. ... -
Extremum-seeking control for steady-state performance optimization of nonlinear plants with time-varying steady-state outputs
(Journal article; Peer reviewed, 2018)Extremum-seeking control is a useful tool for the steady-state performance optimization of plants for which the dynamics and disturbance situation can be unknown. The case when steady-state plant outputs are constant ... -
Extremum-seeking control: convergence improvements and asymptotic stability
(Doctoral thesis at NTNU;2016:167, Doctoral thesis, 2016)Extremum-seeking control is an adaptive-control methodology that optimizes the steady-state performance of dynamical plants by automated tuning of plant parameters based on measurements. The main advantage of extremum-seeking ... -
Extrusion Cycle Optimization
(Master thesis, 2023)Ved å utvikle presis kontollteknologi for ekstruderingsprosesser, skal forskningprosjektet High Precision Extrusion Temperature Control through Digital Technology (ExtruTeC) møte den økende etterspørselen av høykvalitetsprofiler ... -
Factorized Kalman filter implementation for aided inertial navigation systems
(Master thesis, 2022)For å undersøke om NTNU UAVlabs navigasjonssystemsprogramvare for simulering av treghetsnavigasjon kunne forbedres i tilfeller der målevektoren er stor, så utførte vi et eksperiment der vi sammenlignet tre variasjoner av ... -
Fall Detection for the Elderly using Microsoft Kinect
(Master thesis, 2014)This thesis explores the use of Microsoft Kinect for fall detection of elders. Strengths and weaknesses are analyzed, and typical problems encountered when using the Kinect for fall detection in a home environment are ... -
Farmed Atlantic salmon (Salmo salar L.) avoid intrusive objects in cages: The influence of object shape, size and colour, and fish length
(Peer reviewed; Journal article, 2024)Underwater vehicles and other mobile platforms are seeing increased use as tools within fish farming, particularly due to current trends towards Precision Farming practices, and more exposed farming sites. Although many ... -
Fast and accurate time tracking using smartwatches
(Master thesis, 2021)Mennesker foretrekker noen aktiviteter fremfor andre og evne til å kontrollere hvordan en bruker tid er vist til å korrelere med stressnivå og akademisk prestasjon. Mennesker opplevelse av tid er kjent for å være variabel. ... -
Fast divergence-conforming reduced basis methods for stationary and transient flow problems
(Peer reviewed; Journal article, 2020)Reduced basis methods (RB methods or RBMs) form one of the most promising techniques to deliver numerical solutions of parametrized PDEs in real-time with reasonable accuracy [1]. For the Navier-Stokes equation, RBMs based ... -
Fast Optical Flow Estimation for End-Effector Stabilization
(Master thesis, 2020)Målet med denne oppgaven var å undersøke og utvikle en høyhastighetstilstandsberegner med målet å stabilisere en mekansik arm montert under et omnidireksjonelt miniatyrisert luftfartøy. Rask (> 100hz) og nøyaktig (mm ... -
Fast Pressure Control in Managed Pressure Drilling
(Master thesis, 2014)In drilling operations, it is of great importance to efficiently and safely control the pressure in the well. To avoid possible damage to the reservoir, equipment, personnel and the environment, the pressure in the well ... -
Fault detection in glucose control: Is it time to move beyond CGM data?
(Journal article; Peer reviewed, 2018)People with diabetes mellitus type 1 could benefit from fully automated systems for glucose control. However, faults in any component of the system can severely compromise the safety of the user. An increasing degree of ... -
Fault Detection, Localization and Clearance for MMC based on Indirect Finite Control Set Model Predictive Control
(Chapter, 2023)In this paper, indirect finite control set model predictive control (I-FCS-MPC) is used for detecting, localizing, and tolerating open-circuit failures in the transistors without the use of arm voltage sensors. The fault ... -
Fault diagnosis of downhole drilling incidents using adaptive observers and statistical change detection
(Journal article; Peer reviewed, 2015)Downhole abnormal incidents during oil and gas drilling cause costly delays, and may also potentially lead to dangerous scenarios. Different incidents will cause changes to different parts of the physics of the process. ... -
Fault Tolerant Control for automated Managed Pressure Drilling
(Master thesis, 2012)In the last years the cost for rig rental has become very high. To reduce total cost it has been necessary to increase the cost efficiency when drilling to improve profit. One way to improve profit is to reduce the ... -
Fault tolerant control of a proton exchange membrane fuel cell using Takagi–Sugeno virtual actuators
(Journal article, 2016)In this paper, a fault tolerant control (FTC) strategy for proton exchange membrane (PEM) fuel cells based on the use of virtual actuators and the Takagi–Sugeno (TS) approach is proposed. The overall solution relies on ... -
Fault tolerant control of uncertain dynamical systems using interval virtual actuators
(Journal article; Peer reviewed, 2017)In this paper, a model reference fault tolerant control strategy based on a reconfiguration of the reference model, with the addition of a virtual actuator block, is presented for uncertain systems affected by disturbances ...