This paper describes an application of fuzzy logic to an industrial temperature control system. It is a hybrid system of an advanced 2-degree-of- freedom PID controller unit and a fuzzy logic unit. The PID controller functions as a main control component while the fuzzy logical unit functions as a disturbance compensator. The 2-degree-of-freedom PID controller uses a feed forward operator to enhance the system's response to a desired value and allows simultaneous adjustments on target tracking and disturbance response. The fuzzy logic unit enables a simultaneous reduction of the disturbance recovery time and the overshoot amount. Both PID and fuzzy control parameters are tuned automatically, simplifying the user interaction. This hybrid control system has been successfully used in various industrial applications, and some of them are described in this paper.

Date Published: 22 December 1993
PDF: 7 pages
Proc. SPIE 2061, Applications of Fuzzy Logic Technology, (22 December 1993); doi: 10.1117/12.165058

Published in SPIE Proceedings Vol. 2061:
Applications of Fuzzy Logic Technology
Bruno Bosacchi; James C. Bezdek, Editor(s)