Biography
Ph.D. student since 2012.
My research interests are in automatic tuning of PID controllers. The research considers autotuners for both single-input single-output as well as multivariable systems. The autotuners we have developed have been evaluated in simulations and on real processes with good results. The Matlab/Simulink versions of my developed autotuners are available in this git-repo.
For a popular science description of my research, read my story Kontroll-Kalle styr fabriken (in Swedish).
Teaching
Basic course (2010, 2011, 2012, 2013)
Multivariable control (2013, 2014, 2016)
Market-driven systems (2015, 2016)
Process control/Systems engineering (2016)
Publications
Tommi Berner: Modeling and Control for Improved Predictability of Cloud Applications. PhD Thesis Department of Automatic Control, Lund University, Sweden, May 2022.
Johan Ruuskanen, Tommi Berner, Karl-Erik Årzén, Anton Cervin: "Improving the Mean-Field Fluid Model of Processor Sharing Queueing Networks for Dynamic Performance Models in Cloud Computing". Performance Evaluation, 151, 2021.
Josefin Berner, Kristian Soltesz, Tore Hägglund, Karl Johan Åström: "An experimental comparison of PID autotuners". Control Engineering Practice, 73, pp. 124–133, 2018.
Josefin Berner: "Kontroll-Kalle styr fabriken (utökad version)". 2017.
Josefin Berner: Automatic Controller Tuning using Relay-based Model Identification. PhD Thesis Department of Automatic Control, Lund University, Sweden, October 2017.
Josefin Berner, Kristian Soltesz: "Short and Robust Experiments in Relay Autotuners". In 22nd IEEE International Conference on Emerging Technologies and Factory Automation; ETFA2017, Limassol, Cyprus, September 2017.
Josefin Berner, Kristian Soltesz, Karl Johan Åström, Tore Hägglund: "Practical Evaluation of a Novel Multivariable Relay Autotuner with Short and Efficient Excitation". In IEEE Conference on Control Technology and Applications, CCTA 2017, Kohala Coast, United States, August 2017.
Josefin Berner, Kristian Soltesz, Tore Hägglund, Karl Johan Åström: "Autotuner identification of TITO systems using a single relay feedback experiment". IFAC-PapersOnLine, 50:1, pp. 6619–6623, 2017.
Josefin Berner, Tore Hägglund, Karl Johan Åström: "Asymmetric relay autotuning - Practical features for industrial use". Control Engineering Practice, 54, pp. 231–245, 2016.
Josefin Berner, Tore Hägglund, Karl Johan Åström: "Improved Relay Autotuning using Normalized Time Delay". In American Control Conference, 2016, Boston, United States, July 2016.
Josefin Berner: "Kontroll-Kalle styr fabriken". 2015.
Alfred Theorin, Josefin Berner: "Implementation of an Asymmetric Relay Autotuner in a Sequential Control Language". In IEEE International Conference on Automation Science and Engineering (IEEE CASE 2015), August 2015.
Josefin Berner: "Automatic Tuning of PID Controllers Based on Asymmetric Relay Feedback". Licentiate Thesis Department of Automatic Control, Lund University, Sweden, April 2015.
Josefin Berner, Karl Johan Åström, Tore Hägglund: "Towards a New Generation of Relay Autotuners". In 19th IFAC World Congress, 2014, Cape Town, South Africa, August 2014.
Josefin Berner, Aminda Ingulfson: "Optimal Control Algorithms for Klystron Efficiency in ESS". Master's Thesis ISRN LUTFD2/TFRT--5902--SE, Department of Automatic Control, Lund University, Sweden, August 2012.