Blar i NTNU Open på forfatter "Imsland, Lars"
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Estimation in Large Mechanistic Models
Tusvik, Jannicke Selnes (Master thesis, 2011)The main objective in this thesis is to model an offshore processing plant, and adapt it to a given dataset by off-line parameter estimation and then perform an on-line state and parameter estimation. The aim is to use the ... -
Estimation of Bottomhole Pressure for Managed Pressure Drilling: Comparison of Nonlinear Estimators
Løvik, Pål Skønberg (Master thesis, 2011)To avoid hole stability problems in an increasingly fierce drilling environment, the demand for accurate control of the pressure profile during drilling operations is rising. As standard instrumentation of drilling rigs ... -
Estimation of Formation Water rate using Unscented Kalman filtering with application to the Snøhvit Gas/Condensate Field.
Mørk, Anders Jordtveit (Master thesis, 2013)In this thesis, a simplified model of the MEG loop at the Snøhvit field is established and implemented, together with an unscented Kalman filter. The model is tested with and without the Kalman filter. The model is tested ... -
Estimation of Sea Ice Drift Velocity
Hetland, Anders (Master thesis, 2013)The Arctic is an important region containing large amount of unused potential. It is expected that a large amount of the worlds undiscovered oil and gas resources are located here, and the shortest route between northern ... -
Experimental Monitoring of Sea Ice Using Unmanned Aerial Systems
Flåten, Andreas L. (Master thesis, 2015)The exploration of arctic seas for offshore oil- and gas resources has received increasing interest the past few years. Despite the recent dramatic fall in oil prices, estimates indicate that as much as 22% of the worlds ... -
Exploring the potential for improved performance of flow metering using hybrid modeling
Jacobsen, Petter Hjørungnes (Master thesis, 2022)Denne masteroppgaven utforsker anvendelsen av hybrid flytmodellering i olje- og gass-flytmåling. Ettersom beregningskraft og teknologisk forståelse har økt de siste årene, er virtuelle flytmålere (VFM) et voksende felt ... -
Fault Tolerant Control for automated Managed Pressure Drilling
Eilerås, Jarle (Master thesis, 2012)In the last years the cost for rig rental has become very high. To reduce total cost it has been necessary to increase the cost efficiency when drilling to improve profit. One way to improve profit is to reduce the ... -
Gas Lift Optimization Using Python and Prosper Well Models
Hulløen, Bendik Netland (Master thesis, 2022)Arbeidet utført i denne masteroppgaven har hatt som mål å maksimere produksjon av olje innenfor begresninger på trykk, gassløftrate og andre prosessbegrensninger. Brønn-modellen, som beskriver oppførselen til en brønn når ... -
Grey-box modeling of the building thermal dynamics for MPC applications: The case of residential space-heating
Xingji, Yu (Doctoral theses at NTNU;2022:324, Doctoral thesis, 2022)The transition from a conventional energy system to a decarbonized energy system requires an increasing penetration of intermittent renewable energy sources, which brings more fluctuations to the electricity grid. Therefore, ... -
Haraldrud Municipal Solid Waste Combustion Plant in Oslo: Optimizing, Stabilizing and Modeling the Combustion Process
Gudim, Simen Johan (Master thesis, 2011)This thesis has studied Haraldrud MSW combustion process. Haraldrud is a realcombustion plant burning waste for citizens of Oslo. A thoroughly description ofthe combustion process has been presented based on manipulating ... -
High-performance Industrial Embedded Model Predictive Control: Efficient implementation of step response models and fast solvers
Kufoalor, Dzordzoenyenye K. Minde (Doctoral thesis at NTNU;2016:157, Doctoral thesis, 2016)The implementation of embedded Model Predictive Control (MPC) is treated in this thesis with focus on new and challenging applications such as subsea production and processing. The current technology for MPC in the ... -
Holistic flow and pressure control for underbalanced drilling operations
Pedersen, Torbjørn (Doctoral theses at NTNU;2016:333, Doctoral thesis, 2016)This text is targeted towards engineers and researchers working with drilling automation. Though the selected application domain is underbalanced drilling (UBD) the results are applicable to managed pressure drilling ... -
HVAC-systems: Modeling, simulation and control of HVAC-systems
Alvsvåg, Øyvind (Master thesis, 2011)It is of interest for companies to keep the annual operating cost of their buildings as low as possible. A substantial share of the annual operating costs are due to the large amount of energy needed for heating of the ... -
Increased Energy Efficiency in Buildings using Model Predictive Control
Magnussen, Jonas (Master thesis, 2011)The main objective in this thesis is to explore if a model predictive control scheme can increase the energy efficiency in office buildings with waterborne heating systems. The number of office buildings is constantly ... -
Managed Pressure Cementing
Meneses Pereira da Silva, Joao Francisco da Cunha (Master thesis, 2015)Managed Pressure Cementing (MPC) is a method to cement deep offshore wells in a safer, more controlled and more efficient way. It will end up being less costly because by applying managed pressure drilling (MPD) first the ... -
Metaheuristic Parameter Estimation - Using Parallel Computing and MPI
Jenssen, Erlend (Master thesis, 2018)Arguably, bats have the most sophisticated powered flight mechanism among animals. By mimicking their low-frequency dynamics, significant improvements can be made in energy efficiency, reliability and flexibility of ... -
Methods for Ice-Model Updating Using a Mobile Sensor Network
Ersdal, Anne Mai (Master thesis, 2011)The need for dynamic positioning to function in ice-infested waters is growing as the offshore oil and gas industry enters the Arctic. The ice introduces great challenges, some of which can be resolved through proper ice ... -
Model Based Estimation and Control of a BOS Converter
Hammervold, Andreas (Master thesis, 2011)Andreas Hammervold has, during his summer job at Cybernetica AS and project assignment in2010, developed a model of a BOS process for steel production. In this thesis, an estimator based ona Kalman filter should be ... -
Model Predictive Control for Real-time Trajectory Generation in Racing
Hovind, Øystein (Master thesis, 2018)Trajectory generation in autonomous racing is a problem that is a highly challenging task. A racing driver operates the vehicle at the absolute limit of its capabilities, in highly nonlinear areas. Trajectory genration ... -
Model predictive load-frequency control
Ersdal, Anne Mai (Doctoral theses at NTNU;2017:48, Doctoral thesis, 2017)The decrease in frequency quality seen in the Nordic power system over the past two decades is a clear token of the major changes that power systems all around the world are facing. These changes are to a large extent ...