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Recursive Feasibility of Stochastic Model Predictive Control with Mission-Wide Probabilistic Constraints
(Chapter, 2021)This paper is concerned with solving chance-constrained finite-horizon optimal control problems, with a particular focus on the recursive feasibility issue of stochastic model predictive control (SMPC) in terms of mission-wide ... -
Recursive Multi-Channel Prony for PMU
(Journal article; Peer reviewed, 2023)The phasor estimation process is important in monitoring, controlling and protecting power networks. Prony's method can be used as an estimator by which electrical power system parameters are approximated. The Prony algorithm ... -
Redesign and Analysis of Globally Asymptotically Stable Bearing Only SLAM
(Chapter; Peer reviewed, 2017)The Simultaneous Localization And Mapping (SLAM) estimation problem is a nonlinear problem, due to the nature of the range and bearing measurements. In latter years it has been demonstrated that if the nonlinearities from ... -
Reduced order modeling of fluid flows: Machine learning, Kolmogorov barrier, closure modeling, and partitioning
(Peer reviewed; Journal article, 2020)In this paper, we put forth a long short-term memory (LSTM) nudging framework for the enhancement of reduced order models (ROMs) of fluid flows utilizing noisy measurements. We build on the fact that in a realistic ... -
Reduced order models for finite-volume simulations of turbulent flow around wind-turbine blades
(Journal article; Peer reviewed, 2021) -
Reduced Order Observer Design for Managed Pressure Drilling
(Master thesis, 2012)Reduced Order Observer Design for Managed Pressure Drilling -
Reduced-Attitude Control of Fixed-Wing Unmanned Aerial Vehicles Using Geometric Methods on the Two-Sphere
(Peer reviewed; Journal article, 2020)As an alternative to reduced-attitude control of fixed-wing unmanned aerial vehicles using roll and pitch angles, we propose to use a global representation that evolves on the two-sphere. The representation of reduced ... -
Reducing Ground Reflection Multipath Errors for Bluetooth Angle-of-Arrival Estimation by Combining Independent Antenna Arrays
(Peer reviewed; Journal article, 2023)For outdoor navigation using Bluetooth direction finding, elevation angle estimate errors due to ground reflection multipath interference is a significant challenge at low elevation angles. One of the ways to reduce this ... -
Reducing Overparametrization in MRAC for Hyperbolic PDEs
(Peer reviewed; Journal article, 2020)We construct a method of dealing with the problem of overparameterization in model reference adaptive control (MRAC) of 2 ×2 linear hyperbolic partial differential equations (PDEs). The method is based on linear interpolation ... -
Reducing power transients in diesel-electric dynamically positioned ships using re-positioning
(Journal article, 2014)A thrust allocation method with a functionality to assist power management systems by using the hull of the ship as a store of potential energy in the field of environmental forces has been recently proposed and demonstrated ... -
Redundant MEMS-based Inertial Navigation using Nonlinear Observers
(Journal article; Peer reviewed, 2017)We present two alternative methods for fault detection and isolation (FDI) with redundant Microelectromechanical system (MEMS) inertial measurement units (IMUs) in inertial navigation systems (INS) based on nonlinear ... -
Redundant System for Precision Landing of VTOL UAVs
(Master thesis, 2018)This thesis investigates how Vertical Take Off and Landing (VTOL) Unmanned Aerial Vehicles (UAVs) can be automatically landed with high precision in a robust way. Automatic precision landing can allow pilots to land in ... -
Reference optimisation of uncertain offshore hybrid power systems with multi-stage nonlinear model predictive control
(Chapter, 2023)This paper presents a modified multi-stage economic nonlinear model predictive controller (M-ENMPC) for reference optimisation of isolated, uncertain offshore hybrid power systems (OHPSs). These systems require control ... -
Refining Dynamics Identification for Co-Bots: Case Study on KUKA LWR4+
(Journal article; Peer reviewed, 2017)This paper presents an attempt to improve dynamic identification procedure for robotic manipulators, such that obtained models are appropriate for trajectory planning and motion control. In addition to algorithms development, ... -
Regularization when modeling with biased simulation data as a prior
(Chapter, 2023)Embedding physical knowledge in system identification increases the generalization capabilities of the identified models. For complex engineering systems, such as a process plant, the most complete and detailed quantitative ... -
A regularized Moving Horizon Estimator for combined state and parameter estimation in a bioprocess experimental application
(Peer reviewed; Journal article, 2023)Due to the lack or high costs of measurement devices to monitor and control metabolites in microbial cultivation processes, state estimators are often required. These estimators depend on available on-line measurements and ... -
Regularized Nonlinear Moving-Horizon Observer With Robustness to Delayed and Lost Data
(Journal article; Peer reviewed, 2013)This study evaluates the performance of a new shock tube facility used to produce blast loading in controlled laboratory environments. The facility was found to generate a planar shock wave over the tube cross section by ... -
Regulation of ICT security in the petroleum sector
(Research report, 2023)The purpose of this report is to clarify how the protection of information and communication technology (ICT security) in the petroleum industry is regulated under current regulations and to shed light on the expectations ... -
Regulering av IKT-sikkerhet i petroleumssektoren
(Research report, 2021)Formålet med denne rapporten er å klargjøre hvordan beskyttelse av informasjons‐ og kommunikasjonsteknologi (IKT‐sikkerhet) i petroleumsindustrien blir regulert i gjeldende regelverk og belyse forventninger fra myndighetene ... -
Regulering av oljebrønner med varierende aktive begrensninger
(Master thesis, 2008)I offshore produksjonsanlegg er vanligvis brønnene regulert manuelt, mens separasjonsanlegget er regulert ved hjelp av en desentralisert regulator. Det er tydelig at en slik kontroll struktur ikke er optimalt produksjonsmessig. ...