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Output feedback boundary control of 2x2 semilinear hyperbolic systems
(Journal article; Peer reviewed, 2017)We consider the control and state estimation of a class of 2x2 semilinear hyperbolic systems with actuation and sensing collocated at one boundary. Our approach exploits the dynamics on the characteristic lines of the ... -
Output feedback boundary control of heterodirectional semilinear hyperbolic systems
(Peer reviewed; Journal article, 2020)We solve the problem of stabilizing a general class of 1-d semilinear hyperbolic systems with an arbitrary number of states convecting in each direction and with the actuation and sensing restricted to one boundary. The ... -
Output feedback boundary control of series interconnections of 2 x 2 semilinear hyperbolic systems
(Journal article; Peer reviewed, 2017)In this paper, we present an output feedback controller for systems consisting of n 2 × 2 semilinear hyperbolic systems in series interconnection where actuation and sensing are restricted to one boundary. The output-feedback ... -
Output feedback stochastic nonlinear model predictive control for batch processes
(Journal article; Peer reviewed, 2019)Batch processes play a vital role in the chemical industry, but are difficult to control due to highly nonlinear behaviour and unsteady state operation. Nonlinear model predictive control (NMPC) is therefore one of the few ... -
Output feedback stochastic nonlinear model predictive control of a polymerization batch process
(Chapter; Peer reviewed, 2019)Nonlinear model predictive control (NMPC) is one of the few methods that can handle multivariate nonlinear control problems while accounting for process constraints. Many dynamic models are however affected by significant ... -
Output Maneuvering for Cartesian 3D Printer
(Chapter, 2021)3D printing, also known as additive manufacturing, is a production technique that can create highly customized parts and is therefore ideal for product prototyping and customized orders. An important aspect of 3D printer ... -
Overvåking av tilstand og sikkerhet for ubemannede skip
(Master thesis, 2022)Autonome og ubemannede skip har fått mye oppmerksomhet de siste årene, og interessen for å realisere denne typen skip er sterkt økende. Årsakene til dette er at man blant annet kan øke sikkerheten og produktiviteten, samt ... -
Overvåking og kontroll av miljøvariabler i båt, camping eller hytte ved hjelp av BLE-enheter
(Master thesis, 2018)Denne oppgaven beskriver prosessen med å designe og delvis produsere et system for fjernstyrt overvåking og kontroll av enkelte miljøvariabler, som for eksempel temperatur, i hus, hytte, båt og liknende. Det designes et ... -
P-HiL Evaluation of Virtual Inertia Support to the Nordic Power System by an HVDC Terminal
(Chapter, 2020)This paper provides an assessment of the effect from virtual inertia provided by an HVDC converter terminal on the Nordic power system. The analysis is based on results from Power-Hardware-in-the-Loop (P-HiL) tests with a ... -
A Painless Deterministic Policy Gradient Method for Learning-based MPC
(Chapter, 2023)The combination of Reinforcement Learning (RL) and Model Predictive Control (MPC) has gained a lot of interest in the recent literature as a way of computing the optimal policies from MPC schemes based on inaccurate models. ... -
Parameter Estimation and Control of a Dual Gradient Managed Pressure Drilling System
(Master thesis, 2009)The increasing demand for oil and gas in the world, and the fact that most of the easily accessible reservoirs are in production or already abandoned, result in a need to develop new resources. These may be new reservoirs ... -
Parameter estimation for estimation of bottom hole pressure during drilling.
(Master thesis, 2009)In this thesis we examine four bottom hole pressure estimators based on adaptive estimation of the friction pressure for the drill string and the annulus. Knowledge about the bottom hole pressure is crucial to achieve ... -
Parameter Estimation in Atomic Force Microscopy: Nanomechanical Properties and High-speed Demodulation
(Doctoral theses at NTNU;2018:146, Doctoral thesis, 2018)Atomic force microscopy (AFM) has become a key enabling technology for high-precision study of materials and biological processes over the last few decades. Since its invention in 1986, it has undergone rapid developments ... -
Parameter Estimation of Axial Pipe Movement of an Oil Field Drill String
(Master thesis, 2017)Drill strings are long slim rods used in well drilling to transmit torque and weight to the drill bit from the surface. As a consequence, these narrow structures experience various vibrations that could damage the well ... -
Parameter-dependent PWQ Lyapunov function stability criteria for uncertain piecewise linear systems
(Journal article; Peer reviewed, 2018)Abstract: The calculation of piecewise quadratic (PWQ) Lyapunov functions is addressed in view of stability analysis of uncertain piecewise linear dynamics. As main contribution, the linear matrix inequality (LMI) approach ... -
Parametric Roll Resonance Monitoring using Signal-based Detection
(Journal article; Peer reviewed, 2015)Extreme roll motion of ships can be caused by several phenomena, one of which is parametric roll resonance. Several incidents occurred unexpectedly around the millennium and caused vast fiscal losses on large container ... -
Parametric Stability Assessment of Single-Phase Grid-Tied VSCs Using Peak and Average DC Voltage Control
(Journal article; Peer reviewed, 2021)A type of peak-value dc voltage control (denoted as PK control) was proposed in the literature for supporting the use of a smaller dc-side capacitance when the single-phase voltage source converter is operated as a static ... -
Parametrisk usikkerhet i modellbasert regulering
(Master thesis, 2019)Denne oppgaven tar i betraktning arbeidet utført på APT-simulatoren som Hans Erik Frøyen startet på i sin masteroppgave. Nicolay Erlbeck og Karl Arthur Unstad videreutviklet denne simulatoren i sine oppgaver. Oppgaven ... -
Partial Brain Model For real-time classification of RGB visual stimuli: A brain mapping approach to BCI
(Chapter, 2019)Brain-computer interface (BCI) applications are characterized by real-time feature extraction and classification. Thus, brain activity reconstruction is not generally performed due to the long computation times required ... -
Partially distributed optimization for mobile sensor path-planning
(Chapter, 2017)Mobile sensor platforms may provide low-cost, versatile means for obtaining high resolution information from spatially distributed processes. The aim of this paper is to efficiently calculate receding horizon-type motion ...