University of Oulu

Development of a fuzzy logic controller for a rotary dryer with self-tuning of scaling factor

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Author: Pirrello, Leonardo1,2; Yliniemi, Leena1,2; Leiviskä, Kauko1,2
Organizations: 1University of Oulu, Faculty of Technology, Control Engineering Laboratory
2University of Oulu, Faculty of Technology, Department of Process and Environmental Engineering
Format: ebook
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
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Language: English
Published: 2001
Publish Date: 2004-09-21


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 self-tuning 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.

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Series: Control Engineering Laboratory. Report A
ISBN: 951-42-7510-1
ISBN Print: 951-42-6424-X
Issue: 17
Copyright information: © University of Oulu, 2001. This publication is copyrighted. You may download, display and print it for your own personal use. Commercial use is prohibited.