Johan Löfberg

Background:

After graduating in 2003 on Minimax Approaches to Robust Model Predictive Control, and spending three years as a post-doc at the Automatic Control laboratory at ETH, Zurich, I am currently back in Linköping as a research associate in the control group. In 2011, I was appointed Docent.

Research

My research interest lies in the border between control theory and optimization. I was earlier heavily focused on applications of optimization methods in model predictive control, but now prefer a slightly broader perspective. A common factor in most of my work is the development of control-oriented optimization-based algorithms, leading to the constant evolution of a MATLAB based modelling language, called YALMIP.

Some recent work

• D. Simon, J. Löfberg and T. Glad, Reference Tracking MPC using Terminal Set Scaling, Accepted for publication at CDC 2012.
• P. Rosander, A. Isaksson, J. Löfberg and K. Forsman, Performance Analysis of Robust Averaging Level Control, Proceedings of Chemical Process Control VIII, 2012.
• P. Rosander, A. Isaksson, J. Löfberg and K. Forsman, Practical Control of Surge Tanks Suffering from Frequent Inlet Flow Upsets, Proceedings of the IFAC Conference on Advances in PID Control, 2012.
• J. Löfberg, Oops! I cannot do it again: Testing for recursive feasibility in MPC (pre-print) , Automatica 48(3), 2012.
• Th. Besselmann and J. Löfberg and M. Morari, Explicit MPC for LPV Systems: Stability and Optimality (pre-print) , IEEE transactions on Automatic Control 57(9), 2012
• J. Löfberg, Automatic robust convex programming (pre-print), Optimization Methods and Software 27(1), 2012
• R. Falkeborn and J. Löfberg and A. Hansson, Lowrank exploitation in semidefinite programming for control, International Journal of Control 84(12), 2011
• M. Kvasnica and J. Löfberg and M. Fikar, Stabilizing Polynomial Approximation of Explicit MPC, Automatica 47(10), 2011.
• D. Petersson and J. Löfberg, LPV H2-Controller Synthesis Using Nonlinear Programming , IFAC 2011
• T. Ardeshiri, M. Norrlöf, J. Löfberg, A. Hansson, Convex Optimization approach for Time-Optimal Path Tracking of Robots with Speed Dependent Constraints , IFAC 2011
• R. Falkeborn and J. Löfberg and A. Hansson, Lowrank exploitation in semidefinite programming for control, 2010 IEEE Multi-Conference on Systems and Control
• D. Petersson and J. Löfberg, Robust generation of LPV state-space models using a regularized H2-cost, 2010 IEEE Multi-Conference on Systems and Control

Teaching

• Lecturing Introduction to MATLAB
• Lecturing Automatic control (basic course for the mechanical engineering program)

Master (and Bachelor) thesis supervisor

• Fredrik Eskilsson, Passive Control for a Human Power Amplifier,providing Force Amplification, Guidance and Obstacle Avoidance
• Anders Bergdahl, Autonomous bucket emptying on hauler
• Håkan Almqvist, Automatic bucket fill
• Jenny Arkad, Tomas Andersson, A Control Algorithm for an Ultrasonic Motor
• Fredrik Petersson, Modelling, simulation and implementation of sensor-less control of a permanent magnet synchronous motor
• Magnus Larsson, Current control in a new cooling technology
• Björn Ericsson, Model library of cooling system components for Simulink

Phd co-supervisor

• Daniel Simon, Control law development for constrained systems
• Daniel Petersson, Generation of LPV models
• Peter Rosander, Buffer level control