The Effect of Interaction on Tuning and Operability of Classically Controlled Systems

This paper is aimed at evaluating the effect of interaction on the tuning and transient performance of PI controlled multiloop systems. A short-cut method for loop tuning is presented. This technique provides a measurement of how much the controller action has to be reduced due to interaction. A specific example involving a two-bed catalytic reactor is discussed. The effect of interaction and load disturbances on the transient response of the system is analysed.