Browsing USN Open Archive by Author "Haugen, Finn"
Now showing items 1-19 of 19
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Adapting dynamic mathematical models to a pilot anaerobic digestion reactor
Haugen, Finn; Bakke, Rune; Lie, Bernt (Journal article; Peer reviewed, 2013)A dynamic model has been adapted to a pilot anaerobic reactor fed diarymanure. Both steady-state data from online sensors and laboratory analysis anddynamic operational data from online sensors are used in the model ... -
Biogas reactor modeling with ADM1
Lyseng, Benjamin C.; Bergland, Wenche Hennie; Botheju, Deshai; Haugen, Finn; Bakke, Rune (HiT skrift, Research report, 2013-02-11) -
Comparing PI Tuning Methods in a Real Benchmark Temperature Control System
Haugen, Finn (Journal article, 2010)This paper demonstrates a number of PI controller tuning methods being used to tune a temperature controller for a real air heater. Indices expressing setpoint tracking and disturbance compensation and stability margin ... -
Comparison of different state estimator algorithms applied to a simulated anaerobic digestion reactor
Attar, Shadi; Haugen, Finn (Journal article; Peer reviewed, 2018)This study deals with a simulator-based comparison of different state estimators of an anaerobic digestion process. A simulated biogas reactor based on the AM2 model is considered. Extended Kalman Filter, Unscented Kalman ... -
Control of a Buoyancy-Based Pilot Underwater Lifting Body
Haugen, Finn (Journal article, 2010)This paper is about position control of a speci c small-scale pilot underwater lifting body where the lifting force stems from buoyancy adjusted with an air pocket in the lifting body. A mathematical model is developed to ... -
Dynamic model adaptation to an anaerobicdigestion reactor of a water resource recoveryfacility
Attar, Shadi; Haugen, Finn (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 ... -
Economic Model Predictive Control for optimal struvite recovery
Nair, Abhilash Muralidharan; Haugen, Finn; Ratnaweera, Harsha (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, ... -
Experiences and trends in control education: a HIOA/USN perspective
Komulainen, Tiina M.; Alcocer, Alex; Haugen, Finn (Chapter; Peer reviewed, 2016)Global trends in higher education including e-learning, massive open online courses, and new teaching methods have positively affected control education. Control course content has evolved due to changes in industrial ... -
Implementing an Extended Kalman Filter for estimating nutrient composition in a sequential batch MBBR pilot plant
Nair, Abhilash Muralidharan; Fanta, Abaynesh Belay; Haugen, Finn; Ratnaweera, Harsha (Journal article; Peer reviewed, 2019)Online monitoring of water quality parameters can provide better control over various operations in wastewater treatment plants. However, a lack of physical online sensors, the high price of the available online water-quality ... -
Implementing an extended kalmanfilter for estimatingnutrient composition in a sequential batch MBBR pilot plant
Nair, Abhilash Muralidharan; Fanta, Abaynesh Belay; Haugen, Finn; Ratnaweera, Harsha (Journal article; Peer reviewed, 2019)Online monitoring of water quality parameters can provide better control over various operations in wastewater treatment plants. However, a lack of physical online sensors, the high price of the available online water-quality ... -
On-Off and PI control of methane gas production of a pilot anaerobic digestion reactor
Haugen, Finn; Bakke, Rune; Lie, Bernt (Journal article; Peer reviewed, 2013)A proposed feedback control system for methane flow control of a real pilot anaerobic digestion reactor fed with dairy waste is designed and analyzed using the modified Hill model, which has previously been adapted to the ... -
Optimal design and operation of a UASB reactor for dairy cattle manure
Haugen, Finn; Bakke, Rune; Lie, Bernt; Hovland, Jon; Vasdal, Knut (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 ... -
Real-time monitoring of enhanced biological phosphorus removal in a multistage EBPR-MBBR using a soft-sensor for phosphates
Nair, Abhilash Muralidharan; Gonzalez Silva, Blanca Magdalena; Haugen, Finn; Ratnaweera, Harsha; Østerhus, Stein Wold (Peer reviewed; Journal article, 2020)Enhanced biological phosphorus removal (EBPR) from municipal wastewater has been achieved in a multistage Moving Bed Biofilm Reactor (MBBR) configuration. The process operations can be further optimized by real-time ... -
Relaxed Ziegler-Nichols closed loop tuning of PI controllers
Haugen, Finn; Lie, Bernt (Journal article; Peer reviewed, 2013)A modification of the PI setting of the Ziegler-Nichols closed loop tuningmethod is proposed. The modification is based on a combination of the Skogestad SIMCtuning formulas for ´´integrator plus time-delay´´ processes ... -
Review of simulator training practices for industrial operators: How can individual simulator training be enabled?
Marcano, Laura; Haugen, Finn; Sannerud, Arne Ronny; Komulainen, Tiina M. (Journal article; Peer reviewed, 2019)The aim of simulator training is to improve the safety and integrity of operations. Effective simulator training involves relevant feedback and sound assessment of the operator’s performance. Operators need proper feedback ... -
Simulations and real applications of PI and MPC averaging level control in a water resource recovery facility
Haugen, Finn (Journal article; Peer reviewed, 2018)The basin level control system in an existing wastewater treatment plant is designed for two different operation modes: compliant level control for smooth pump flow, and stiff level control. Both a model-based predictive ... -
State estimation and model-based control of a pilot anaerobic digestion reactor
Haugen, Finn; Bakke, Rune; Lie, Bernt (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 ... -
Temperature control of a pilot anaerobic digestion reactor
Haugen, Finn; Bakke, Rune; Lie, Bernt (Journal article; Peer reviewed, 2013)Results of analysis and design and implementation of a temperature control system for a practical pilot anaerobic digestion (AD) bioreactor fed with dairy waste are presented. A dynamic model of the reactor temperature is ... -
The Good Gain method for simple experimental tuning of PI controllers
Haugen, Finn (Journal article; Peer reviewed, 2012)A novel experimental method { here denoted the Good Gain method { for tuning PI controllers is proposed. The method can be regarded as an alternative to the famous Ziegler-Nichols' Ultimate Gain method. The approach taken ...