Title :
Controller tuning for a slow nonlinear process
Author :
Dreinhoefer, Louis H.
Author_Institution :
Aluminium Co. of America, Pittsburgh, PA, USA
fDate :
4/1/1988 12:00:00 AM
Abstract :
Determining the tuning constants of a classical PID (proportional-integral-derivative) controller for a slow nonlinear process, such as the temperature loops on a heat-treat of annealing furnace, can be a laborious task. Several tuning methods were considered to identify a method that could be applied easily in the field with limited resources. The method of Ziegler and Nichols (1942) proved to easy and effective. Results obtained by using the Ziegler-Nichols open-loop method to determine the tuning constants for a classical PID temperature controller for a heat-treat furnace are described. The process being controlled is described, and open-loop test data are presented.<>
Keywords :
furnaces; heat treatment; nonlinear control systems; process control; temperature control; three-term control; PID control; annealing furnace; controller tuning; heat-treat furnace; open-loop method; proportional-integral-derivative control; slow nonlinear process; temperature loops; tuning constants; Delay effects; Furnaces; Open loop systems; PD control; Pi control; Process control; Proportional control; Temperature control; Testing; Three-term control;
Journal_Title :
Control Systems Magazine, IEEE
