Test of a PI controller with Automatic Tuning (mixed mode)
Description
In this example have been tested the functionalities of the mixed mode PI with Automatic Tuning.
The PI has to control the process with transfer function
Y(s) 1
---- = --------------
U(s) (s + 1)^3
There are three PIs that are automatically tuned. The PIs have different Phase Margin requirements: 45, 60 and 70 respectively.
The first image shows the process variables controlled by the three PIs PV.
There are thre phases:
- Normal mode [0,50]: PIs working with default parameters values,
- Auto Tuning phase [50,120]: PIs excite the processes in order to identify some characteristic parameters,
- Normal mode [120,end]: PIs working with tuned parameters values
Control signals
References
For more information please refers to the following
paper:
Efficient hybrid simulation of autotuning PI controllers
Alberto Leva, Marco Bonvini
8th Modelica Conference, Dresden, Germany
march 20-22, 2011
- Industrial Control Systems (v 1.0.0) : April-May 2012
- List of revisions:
- 11 May 2012 (author: Marco Bonvini)
- Main Authors:
- Marco Bonvini; <bonvini@elet.polimi.it>
- Alberto Leva <leva@elet.polimi.it>
- Politecnico di Milano
- Dipartimento di Elettronica e Informazione
- Via Ponzio 34/5
- 20133 Milano - ITALIA -
- Copyright:
- Copyright © 2010-2012, Marco Bonvini and Alberto Leva.
- The IndustrialControlSystems package is free software; it can be redistributed and/or modified under the terms of the Modelica license.
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.IndustrialControlSystems.Controllers.AutoTuning.Examples.Test_ATPIrelayNCmixedMode