Blar i Institutt for elektro, IT, og kybernetikk på tittel
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Detecting emergence in engineered systems: A literature review and synthesis approach
(Peer reviewed; Journal article, 2023)Modern product development often generates systems of high complexity that are prone to emergent behavior. The industry has a need to establish better practices to detect inherent emergent behavior when engineering such ... -
Developing protective limiters for a hydro power controller in modelica
(Peer reviewed; Journal article, 2021)In recent years the operation of electrical power plants has become more and more challenging due to a more dynamic operation pattern in order to keep the voltage quality within the limits of what the electrical network ... -
Developing ultrasonic soft sensors to measure rheological properties of non-Newtonian drilling fluids
(Journal article; Peer reviewed, 2019)Surveillance of the rheological properties of drilling fluids is crucial when drilling oil wells. The prevailing standard is lab analysis. The need for automated real-time measurements is, however, clear. Ultrasonic ... -
Developing Voltage Droop/Compensation Controller for a Hydro Power Controller in Modelica
(Peer reviewed; Journal article, 2022)With the introduction of unregulated renewable energy such as wind, solar and tidal power, the operation of the electrical grid has become more and more challenging. The more dynamic production pattern requires more advanced ... -
Digital twin in power system research and development: Principle, scope, and challenges
(Peer reviewed; Journal article, 2023)In order to address the issues that arise in modern power systems, such as system dynamics, stability, control, efficiency, reliability, economy, planning and policy, and so on, efforts have been made to develop new tools ... -
Discrete LQ optimal control with integral action: A simple controller on incremental form for MIMO systems.
(Journal article; Peer reviewed, 2012)A simple Linear Quadratic (LQ) optimal controller of velocity (incremental) form with approximately the same properties as a conventional PID controller of velocity form is presented, i.e. integral action. The proposed ... -
DroneLibrary: Multi-domain Drone Modeling in Modelica
(Chapter, 2023)In the development of complex, novel electrified aerial systems such as Unmanned Aerial Vehicles (UAVs) and electric vertical take-off and landing (eVTOL) systems, multi-domain modeling and simulation studies can provide ... -
Dynamic model adaptation to an anaerobicdigestion reactor of a water resource recoveryfacility
(Journal article; Peer reviewed, 2019)This study deals with model adaptation of the AM2 model to an anaerobic digestion reactor of a water resource recovery facility, namely a 6000m3 reactor at VEAS WWRF, the largest of Norway. The model is based on the mass ... -
Dynamic Model of an Ammonia Synthesis Reactor Based on Open Information
(Chapter; Peer reviewed, 2016)Ammonia is a widely used chemical, hence the ammonia manufacturing process has become a standard case study in the scientific community. In the field of mathematical modeling of the dynamics of ammonia synthesis reactors, ... -
Dynamic system calibration by system identification methods
(Chapter; Peer reviewed, 1997)Primary output variables from industrial processes can be estimated from known input variables and secondary process measurements. As a basis for this, the dynamic predictor has to be identi ed from data collected during ... -
Dynamic system multivariate calibration
(Journal article; Peer reviewed, 1998)In the first part of the paper, the optimal estimator for normally nonmeasured primary outputs from a linear, time invariant and stable dynamic system is developed. The optimal estimator is based on all available information ... -
Dynamic system multivariate calibration based on multirate sampling data
(Journal article; Peer reviewed, 2001) -
Dynamic system multivariate calibration for optimal primary output estimation
(Doctoral thesis; Peer reviewed, 1999)In industrial plants and other types of dynamic systems, it is a common situation that measurements of primary system outputs are not available on-line. The primary outputs may for example be quality properties, that can ... -
Dynamic system multivariate calibration with low-sampling-rate y data
(Journal article; Peer reviewed, 2000)When the data in principal component regression (PCR) or partial least squares regression (PLSR) form time series, it may be possible to improve the prediction/estimation results by utilizing the correlation between ... -
Dynamical BLUP modeling of reaction norm evolution, accommodating changing environments, overlapping generations, and multivariate data
(Peer reviewed; Journal article, 2023)For theoretical studies, reaction norm evolution in a changing environment can be modeled by means of the multivariate breeder's equation, with the reaction norm parameters treated as traits in their own right. This is, ... -
Economic Model Predictive Control for optimal struvite recovery
(Peer reviewed; Journal article, 2020)Resource recovery from municipal wastewater has been a prime focus for a decade. Although several recovery processes already exist in the market today, the high cost of material, inherent disturbance in the influent quality, ... -
Educating future technical leaders
(Journal article, 2007) -
Efficient parameterization of modelica models
(Peer reviewed; Journal article, 2021)This article presents the different approaches and use cases for efficient parameterization of Modelica models by means of external data resources. The main motivation is to improve the overall quality, testability and ... -
Electric Submersible Pump Lifted Oil Field: Basic Model for Control, and Comparison of Simulation Tools
(Peer reviewed; Journal article, 2024)Early childhood educationOptimal operation of petroleum production is important in a transition from energy systems based on fossil fuel to sustainable systems. One sub-process in petroleum production deals with transport ... -
Electrical Power System Modelling in Modelica – Comparing Open-source Library Options
(Journal article; Peer reviewed, 2017)The past modelling of electrical powers systems used to be a the domain of a few major power system modelling tools. Commercial tools1 like DIgSILENT PowerFactory [3], POWERSYS EMTP-RV [17], PSCADTM [14], Siemens PSS/E R ...