Automatic TuningResearchers: Kristian Soltesz, Tore Hägglund, Karl Johan Åström
Within process industry, a large number of processes can be accurately modeled using simple models, i.e. SISO FOTD or SOTD.
In order to control FOTD or SOTD processes, it is often sufficient to use the PID controller. It is desired to choose PID parameters yielding a closed loop system with robustness towards load and measurement disturbances.
We aim at developing a methodology for automatic tuning of PID controllers, using nonlinear feedback for idenfication input generation and optimization based methods for both process parameter identification and controller synthesis.
The main components of the auto-tuning alogorithm are the following:
- Generate identification input with little or none a priori system information
- Transfer function parameter identification through optimization
- Model verification
- PID synthesis
- Performance evaluation
As a case study, a modified version of the method has been applied in closed-loop controlled anesthesia.
This page will not be subject to further updates. The closed-loop anesthesia project is described here.
Kristian Soltesz: "On Automation of the PID Tuning Procedure". Licentiate Thesis ISRN LUTFD2/TFRT--3254--SE, Department of Automatic Control, Lund University, Sweden, January 2012.
Kristian Soltesz, Tore Hägglund: "Extending the Relay Feedback Experiment". In 18th IFAC World Congress, Milano, Italy, August 2011.
Kristian Soltesz, Tore Hägglund, Karl Johan Åström: "Transfer Function Parameter Identification by Modified Relay Feedback". In 2010 American Control Conference, Baltimore, Maryland, USA, June 2010.