Development of a fuzzy logic controller for a rotary dryer with self-tuning of scaling factor
Leonardo Pirrello, Leena Yliniemi, Kauko Leiviskä · 2001
The control of the drying process in a rotary dryer is difficult due to delay time and the very complex process that includes the movement of the solids in addition to thermal drying. Thus, even today rotary dryers are partly manually controlled based on the operator’s experience and partly automatically controlled relying on conventional control methods. In this paper, which applies advanced control to a rotary dryer, two different control systems are developed. The first is a selftuning PID-type pure fuzzy feedback and the second is a self-tuning PID-type hybrid feedback and feedforward. The performances are compared with a traditional PID controller and both control systems give much better results then a traditional PID controller.