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On the Dynamics of Money Circulation, Creation and Debt – a Control Systems Approach
(Doctoral theses at NTNU;2018:304, Doctoral thesis, 2018)This thesis develops and explores a way of understanding a macroeconomy; as a set of "nodes" interconnected via a network of money flows. A metaphor for this is a body with a circulatory blood system, furnishing the different ... -
On the Equivalence and Impact on Stability of Impedance Modeling of Power Electronic Converters in Different Domains
(Journal article, 2017)Small-signal analysis of power electronic converters and systems is often carried out by impedance-based methods. At the core of these methods lies the impedance modeling, which can either be obtained through analytical ... -
On the globally exponentially convergent immersion and invariance speed observer for mechanical systems
(Journal article; Peer reviewed, 2017)In this article we present a reformulation of the invariance and immersion speed observer of Astolfi et al. as applied to mechanical systems with bounded inertia matrices. This is done to explore the possibility of its ... -
On the impact of additive disturbances on Auto-Steering Systems
(Journal article; Peer reviewed, 2017)Several control techniques are available for the automotive systems and their design is often based on the available measurements of different parameters and the integration of the hard input and performance constraints. ... -
On the Impedance Modeling and Equivalence of AC/DC Side Stability Analysis of a Grid-tied Type-IV Wind Turbine System
(Journal article; Peer reviewed, 2018)Impedance modeling of a Type-IV wind turbine is usually associated with model reductions, e.g. the grid-side converter (GSC) is modeled in detail, whereas the machine-side converter (MSC) is simplified as a constant power ... -
On the Management and Control of Isolated Power Systems
(Doctoral thesis at NTNU;2015:261, Doctoral thesis, 2015)Power systems have been a rich arena for research and study since the very beginning of their use commercially in the late 19th century. At the beginning, the objectives of the research were focused on the stability and ... -
On the Piecewise Affine Representation of Neural Networks
(Master thesis, 2019)Det kan vises at nevrale nett kan uttrykkes som stykkevise affine (PWA) funksjoner. Men, forskning har fokusert på å telle de lineære regionene, fremfor å finne den eksplitte PWA formen. Denne oppgaven fremfører en algoritme ... -
On the Potential of Utilizing Laboratory-Scale Experimental Setup as Proxy For Real-Life Applications: Time Series Analysis and Prediction for Hole Cleaning
(Master thesis, 2023)Hullrensing er en viktig del av oljeboring. Hullresning innebærer å fjerne borekaks fra brønnen ved hjelp av en borevæske. Ytelsen til hullresingsprosessen kan måles ved sirkulasjonstrykket (ECD), som påvirkes av forskjellige ... -
On the stability bounds of Kalman filters for linear deterministic discrete-time systems
(Peer reviewed; Journal article, 2020)In this article, we prove input-to-state stability of the estimation error of the discrete-time Kalman filter under suitable assumptions. Input-to-state stability is an important prerequisite for the use of many contemporary ... -
On the Usage of Low-Cost MEMS Sensors, Strapdown Inertial Navigation and Nonlinear Estimation Techniques in Dynamic Positioning
(Peer reviewed; Journal article, 2020)In this article, we suggest that a strapdown inertial navigation system based on microelectromechanical system (MEMS) inertial sensors is a useful addition to a vessel with dynamic positioning (DP). We conduct full-scale ... -
On Uniform Semiglobal Exponential Stability (USGES) of Proportional Line-of-Sight Guidance Laws
(Journal article; Peer reviewed, 2014-11)This paper presents a uniform semiglobal exponential stability (USGES) proof for a class of proportional line-of-sight (LOS) guidance laws used for vehicle path-following control. The LOS guidance law under consideration ... -
On Usage Of EEG Brain Control For Rehabilitation Of Stroke Patients
(Chapter, 2016)This paper demonstrates rapid prototyping of a stroke rehabilitation system consisting of an interactive 3D virtual reality computer game environment interfaced with an EEG headset for control and interaction using brain ... -
On wind Turbine failure detection from measurements of phase currents: a permutation entropy approach
(Research report, 2016)This article presents the applicability of Permutation Entropy based complexity measure of a time series for detection of fault in wind turbines. A set of electrical data from one faulty and one ... -
ON-BOARD CHARACTERIZATION OF HYPERSPECTRAL IMAGE EXPOSURE AND CLOUD COVERAGE BY COMPRESSION RATIO
(Peer reviewed; Journal article, 2022) -
On-line calibration of spectroscopic sensors based on nonlinear observers
(Peer reviewed; Journal article, 2020)Spectroscopic sensors provide on-line information about process variables and they have been widely used for monitoring and control. These sensors measure the spectral responses at a large number of wavelengths correlated ... -
Onboard Hyperspectral Classification Enables Georeferencing
(Journal article; Peer reviewed, 2023)The Norwegian University of Science and Technology (NTNU) has been building a system composed of multiple remote sensing agents for ocean observations. NTNU launched the first HYPerspectral Smallsat for Ocean observation ... -
Online Modelling of Fuel Efficiency Curves in Generating Machines
(Master thesis, 2018)Gas turbines and diesel engines are important for generating energy in the process industry. Any optimization of the performance in such machines would contribute to reduce the emissions of greenhouse gases in the atmosphere ... -
Online Parameter Estimation for State of Health and State of Charge Estimation with Joint and Dual Extended Kalman Filters
(Master thesis, 2024)I de siste tiårene har litium-ion-batterier (LIB) blitt den ledende teknologien innen energilagring. På grunn av dens mange gode egenskaper blir de implementert i en rekke ulike applikasjoner. Dessverre er ikke batteriene ... -
Online parameter identification of synchronous machines using Kalman filter and recursive least squares
(Chapter, 2019)This paper investigates and implements a procedure for parameter identification of salient pole synchronous machines that is based on previous knowledge about the equipment and can be used for condition monitoring, online ... -
Online Path Planning for Surface Vehicles Exposed to Unknown Ocean Currents Using Pseudospectral Optimal Control
(Journal article; Peer reviewed, 2016)This paper investigates the feasibility of using pseudospectral (PS) optimal control in real-time path planning for marine surface vehicles in environments where both obstacles and unknown disturbances are present. In ...