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A crisis-robust modern macroeconomic system - a Control Systems Approach
(Master thesis, 2021)Det finansielle systemet er viktig for koordinering av mennesker, prosjekter og ressurser, og det har derfor en katastrofal virkning når det slutter å fungere i en finanskrise. Som en makroøkonomisk utfordring erkjennes ... -
A Cyber-Physical Systems Approach for Implementing the Receding Horizon Optimal Power Flow in Smart Grids
(Journal article; Peer reviewed, 2017)Two Major challenges in securing reliable Optimal Power Flow (OPF) operations are: (i) fluctuations induced due to renewable generators and energy demand, and (ii) interaction and interoperability among the different ... -
A Data-driven Approach to Grid Impedance : Identification for Impedance-based Stability Analysis under Different Frequency Ranges
(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 ... -
A deep learning enabler for non-intrusive reduced order modeling of fluid flows
(Journal article; Peer reviewed, 2019)In this paper, we introduce a modular deep neural network (DNN) framework for data-driven reduced order modeling of dynamical systems relevant to fluid flows. We propose various DNN architectures which numerically predict ... -
A Deep Learning-Based 3D Vision Pipeline for Shape Completion of 3D Objects
(Master thesis, 2019)Enkelt-vis formfullføring omhandler problemet hvor målet er å estimere den komplette geometrien fra delvise observasjoner av objekter, noe som er essensielt i mange applikasjoner innen datasyn og robotikk. Denne oppgaven ... -
A Delay Vector Variance based Approach for Detecting and Isolating the Non-linearity Induced Oscillations in Control Loops
(Journal article, 2017)Non-linear time series analysis based methods are a popular choice for industrial control loop data analysis. In this paper a delay vector variance (DVV) based approach is presented to analyze the source of oscillations ... -
A Distributed Algorithm for Scenario-based Model Predictive Control using Primal Decomposition *
(Journal article; Peer reviewed, 2018)In this paper, we consider the decomposition of scenario-based model predictive control problem. Scenario MPC explicitly considers the concept of recourse by representing the evolution of uncertainty by a discrete scenario ... -
A distributed parameter systems view of control problems in drilling
(Journal article; Peer reviewed, 2015)We give a detailed view of estimation and control problems raised by the drilling process where the distributed nature of the system cannot be ignored. In particular, we focus on the transport phenomena in Managed Pressure ... -
A dither-free extremum-seeking control approach using 1st-order least-squares fits for gradient estimation
(Journal article; Peer reviewed, 2014) -
A dynamic model of the drilling action of percussive tools
(Chapter, 2019)A phenomenological model is proposed to explain the existence of sweet spot in the relationship between the rate of penetration (ROP) and the weight-on-bit (WOB), i.e., the existence of an optimal WOB for which the ROP is ... -
A Dynamic Window-Based Controller for Dynamic Positioning Satisfying Actuator Magnitude Constraints
(Journal article, 2018)This paper considers the use of a simplified dynamic window (DW) algorithm to handle actuator magnitude constraints for a 3 degrees-of-freedom dynamic positioning controller for ships. To accomplish this, we use the ... -
A Fault Tolerant Control Scheme Using the Feasible Constrained Control Allocation Strategy
(Journal article; Peer reviewed, 2019)This paper investigates the necessity of feasibility considerations in a fault tolerant control system using the constrained control allocation methodology where both static and dynamic actuator constraints are considered. ... -
A Flashcard Based Web Application for Collective Learning and Peer Review Based Evaluation of Students
(Master thesis, 2021)Denne oppgaven beskriver implementeringen av en flashcard-basert pedagogisk applikasjon utviklet for emnet TTK4145 - Sanntidsprogrammering ved NTNU. Systemet ble utviklet med formål om å tilby en ny, unik type øving for ... -
A Formation of Unmanned Vehicles for Tracking of an Acoustic Fish-Tag
(Chapter; Peer reviewed, 2017)In this paper we present a proof-of-concept for an hydro acoustic fish-tag position estimation and tracking system. In our field-tested concept, a formation of Unmanned Surface Vehicles (USV) creates a mobile array of ... -
A Framework for Diagnosis of Critical Faults in Unmanned Aerial Vehicles
(Journal article; Peer reviewed, 2014)Unmanned Aerial Vehicles (UAVs) need a large degree of tolerance towards faults. If not diagnosed and handled in time, many types of faults can have catastrophic consequences if they occur during flight. Prognosis of faults ... -
A Framework for Fault Diagnosis in Managed Pressure Drilling Applied to Flow-Loop Data
(Journal article; Peer reviewed, 2013)Data from a medium-scale horizontal flow loop test facility is used to test fault diagnosis in managed pressure drilling. The faults are downhole incidents such as formation influx, fluid loss, drillstring washout, pack-off, ... -
A fully differential capacitively-coupled high CMRR low-power chopper amplifier for EEG dry electrodes
(Journal article; Peer reviewed, 2020)The use of dry electrodes is increasing rapidly. Since their impedance is high, there is a high impedance node at the connecting node between the electrode and amplifier. This leads to absorb powerline signal and high CMRR ... -
A Game-based Learning Framework for Controlling Brain-Actuated Wheelchairs
(Chapter, 2016)Paraplegia is a disability caused by impairment in motor or sensory functions of the lower limbs. Most paraplegic subjects use mechanical wheelchairs for their movement, however, patients with reduced upper limb functionality ... -
A Geometric Approach to the Design of Serial and Parallel Manipulators with Passive Joints
(Journal article; Peer reviewed, 2014)The use of robotic manipulators in remote and sensitive areas calls for more robust solutions when handling joint failure, and the industry demands mathematically robust approaches to handle even the worst case scenarios. ... -
A graph-theoretical approach to fusing teachers' opinions about learning outcomes in higher education programmes
(Master thesis, 2021)Et høyere utdanningsprogram kan bli modellert som en graf hvor noder kan representere fag, emner, teamer eller sub-temaer innen et program, og hvor kantene representerer potensielle relasjoner mellom dem. Slike grafer kan ...