Browsing NTNU Open by Author "Knudsen, Brage Rugstad"
Now showing items 21-29 of 29
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Penalty Function Approaches for Proactive Fault-Tolerant Model Predictive Control
Brusevold, Jon Håman (Master thesis, 2015)In the event of actuator faults in systems, standard control algorithms might not be sufficient for stabilizing the system and keeping the performance at an accept- able level. Because of this, fault-tolerant control methods ... -
Petroleum production optimization - A static or dynamic problem?
Foss, Bjarne Anton; Knudsen, Brage Rugstad; Grimstad, Bjarne André (Journal article; Peer reviewed, 2018)This paper considers the upstream oil and gas domain, or more precisely the daily production optimization problem in which production engineers aim to utilize the production systems as efficiently as possible by for instance ... -
Proactive Actuator Fault-Tolerance in Economic MPC for Nonlinear Process Plants
Knudsen, Brage Rugstad (Journal article; Peer reviewed, 2016)This paper presents a scheme for proactive accommodation of incipient actuator faults in nonlinear process plants operated with economic model predictive control (EMPC). The control scheme implements a switching from nominal ... -
Production Optimization in Shale Gas Reservoirs
Knudsen, Brage Rugstad (Master thesis, 2010)Natural gas from organic rich shales has become an important part of the supply of natural gas in the United States. Modern drilling and stimulation techniques have increased the potential and profitability of shale gas ... -
Reference optimisation of uncertain offshore hybrid power systems with multi-stage nonlinear model predictive control
Hoang, Kiet Tuan; Knudsen, Brage Rugstad; Imsland, Lars Struen (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 ... -
Seasonal storage and demand side management in district heating systems with demand uncertainty.
Egging-Bratseth, Ruud; Kauko, Hanne; Knudsen, Brage Rugstad; Bakke, Sara Angell; Ettayebi, Amina; Haufe, Ina Renate (Peer reviewed; Journal article, 2021)District heating is an under-researched part of the energy system, notwithstanding its enormous potential to contribute to Greenhouse Gas emission reductions. Low-temperature district heating is a key technology for ... -
Sensor fault tolerance in output feedback nonlinear model predictive control
Knudsen, Brage Rugstad; Alessandretti, Andrea; Jones, Colin N. (Journal article; Peer reviewed, 2016)This paper presents an active output feedback fault-tolerant model predictive control (MPC) scheme for systems with sensor faults. The proposed control scheme actively steers the system in order to prevent loss of observability ... -
Shale-gas wells as virtual storage for supporting intermittent renewables
Knudsen, Brage Rugstad; Foss, Bjarne Anton (Journal article; Peer reviewed, 2016)Mature shale-gas wells possess a property that enables cyclic production and shut-in without incurring revenue losses. Based on this property, we suggest that fields with mature shale-gas wells may act as virtual gas storage ... -
A simple dynamic optimization-based approach for sizing thermal energy storage using process data
Martins Nakama, Caroline Satye; Knudsen, Brage Rugstad; Tysland, Agnes Camilla; Jäschke, Johannes (Peer reviewed; Journal article, 2023)Thermal energy storage (TES) can increase waste heat utilization in district heating (DH) by storing excess energy to be used later to compensate for energy deficit. When sizing a TES tank for DH, incorporating operational ...