Department of Automatic Control
Signal filtering in PID control
The major input signals entering the PID controller are: the setpoint, the process output, and measurable load disturbances. By feeding these signals through suitable filters before they enter the PID controller, the properties of the feedback loop can be improved significantly. This presentation will treat setpoint handling, feedforward from load disturbances, TITO control, noise filtering, and process dynamics compensation.
Tore Hägglund is professor in automatic control at Lund University in Sweden. His main research interests include PID control, process control, monitoring and diagnosis, and industrial implementation and applications. Tore Hägglund has written several books about PID and process control, has worked at ABB for four years, and holds several patents in the area.