Blar i Institutt for elektro, IT, og kybernetikk på utgivelsesdato
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Estimation of gas/liquid and oil/water interface levels in an oil/water/gas separator based on pressure measurements and regression modelling
(Journal article; Peer reviewed, 2013-02-08)Gravity separators are widely used for separation of gas/oil/water/sand from both offshore and onshore oil production facilities. Estimation of the gas/liquid and oil/water interface levels in gravity separators have been ... -
Acoustic chemometrics for on-line monitoring and end-point determination of fluidised bed drying
(Journal article; Peer reviewed, 2013-07-02)An emerging process analytical technology (PAT) technique, acoustic chemometrics, was applied for monitoring of heated fluidised bed drying process. The feasibility of quantitative on-line monitoring of the drying progress ... -
Control of temperature and energy consumption in buildings - a review.
(Journal article; Peer reviewed, 2014)Building sector is one of the largest energy consumers in the world and currently it utilizes 40% of the total energy in the European Union. At the beginning of the article, energy crisis related to the buildings is defined ... -
Modelling the heat dynamics of a residential building unit: Application to Norwegian buildings.
(Journal article; Peer reviewed, 2014)The paper refers to the development of a continuous time mathematical heating model for a building unit based on the rst principles. The model is described in terms of the state space variables, and a lumped parameter ... -
Numerical solution of the Saint Venant equation for Non-Newtonian fluid
(Journal article; Peer reviewed, 2014)Non-Newtonian fluid flow through a Venturi channel is studied using the Saint Venant equation. The nonlinear hyperbolic equation is numerically tricky to solve, therefore in this study, we consider the finite volume method ... -
Comparison of simple projection methods (OPLS, PLSO, and TP) for separation of predicting and non-predicting information in PLSR and PCR, with focus on DA
(Peer reviewed; Journal article, 2014)Orthogonal projections to latent structures (OPLS) and target projection (TP) are two alternative methods for separation of predicting and non-predicting parts of the predictor matrix in partial least squares regression ... -
State estimation and model-based control of a pilot anaerobic digestion reactor
(Journal article; Peer reviewed, 2014)A state estimator and various model-based control systems have been designed for a real anaerobic digestion (AD) pilot reactor fed with dairy manure. The model used is a modified Hill model which is a relatively simple ... -
Modelling the System Dynamics of Islanding Asynchronous Generators
(Journal article; Peer reviewed, 2014-03)Asynchronous generators are often used for small hydro power stations with an installed power capacity of under 1MW. The reason for this is their robustness and low cost. In order do be able to produce active electrical ... -
Online acoustic chemometric monitoring of fish feed pellet velocity in a pneumatic conveying system
(Journal article; Peer reviewed, 2014-03-14)Fish farmers consider the cost of fish feed pellets as one of the most expensive factors in fish cultivation. Proper control of the handling and conveying systems is necessary to avoid damage and disintegration of the ... -
3-way PLS regression and dual energy gamma densitometry for prediction of total volume fractions and enhanced flow regime identification in multiphase flow
(Journal article; Peer reviewed, 2014-12)Dual energy gamma densitometry and 3-way partial least squares regression were applied to quantify the total volume fractions and improve flow regime identification in multiphase flow. Multiphase flow experiments were ... -
Power System Stability Using Modelica
(Journal article; Peer reviewed, 2014-12-09)This paper is concerned with power system modeling using the Modelica language in comparison to a traditional simulation tool. Though most common power system simulation tools are computationally efficient and reasonably ... -
Modeling and Simulation of A Multi-Zone Building for Better Control
(Journal article; Peer reviewed, 2014-12-09)Buildings are one of the largest energy consumers in most of the countries. Building sector in the European Union (EU) is continuously expanding and currently utilizes 40% of total energy consumption in the union. Out of ... -
Structural observability analysis of large scale systems using Modelica and Python
(Journal article; Peer reviewed, 2015)State observability of dynamic systems is a notion which determines how well the states can be inferred from input-output data. For small-scale systems, observability analysis can be done manually, while for large-scale ... -
Model-free optimal anti-slug control of a well-pipeline-riser in the K-Spice/LedaFlow simulator
(Journal article; Peer reviewed, 2015)Simplified models are developed for a 3-phase well-pipeline-riser and tested together with a high fidelity dynamic model built in K-Spice and LedaFlow. These models are developed from a subspace algorithm, i.e. Deterministic ... -
Model based control for run-of-river system. Part 2: Comparison of control structures
(Journal article; Peer reviewed, 2015)Optimal operation and control of a run-of-river hydro power plant depend on good knowledge of the elements of the plant in the form of models. Both the control architecture of the system, i.e. the choice of inputs and ... -
Model based control for run-of-river system. Part 1: Model implementation and tuning
(Journal article; Peer reviewed, 2015)Optimal operation and control of a run-of-river hydro power plant depends on good knowledge of the elements of the plant in the form of models. River reaches are often considered shallow channels with free surfaces. A ... -
Parameter and State Estimation of Large-Scale Complex Systems Using Python Tools
(Journal article; Peer reviewed, 2015)This paper discusses the topics related to automating parameter, disturbance and state estimation analysis of large-scale complex nonlinear dynamic systems using free programming tools. For large-scale complex systems, ... -
Optimal design and operation of a UASB reactor for dairy cattle manure
(Journal article; Peer reviewed, 2015-02-01)Optimal design and operation of a planned full-scale UASB reactor at a dairy farm are determined using optimization algorithms based on steady state simulations of a dynamic AD process model combined with models of the ... -
Second order scheme for open channel flow
(Professional article, 2015-08-26)In the search for a numerical scheme which: (i) is semi-descrete in nature (only space discritization) so that built-in ODE solvers in MATLAB or Modelica can be used, (ii) can handle dry bed conditions (island or dry ... -
Where impact got going
(Journal article; Peer reviewed, 2015-09-18)This paper discusses the impact package manager. The primary goal of this project is to support the development of a healthy eco-system around Modelica. For many other languages, the existence of an easy to use package ...