Simple Method for Tuning SISO Controllers in Multivariable Systems

Abstract

A simple, practical approach to the problem of finding reasonable controller settings for the N single-input-single-output controllers in Nth-order typical industrial multivariable process is presented. The procedure is a straight-forward extension of the familiar Nyquist method and requires only nominal computing power. The method has been tested on ten multivariable distillation column examples from the literature, varying from 2 × 2 systems up to 4 × 4 systems. The settings determined by the method gave reasonable dynamic responses that were comparable to the empirical settings reported by the original authors. © 1986, American Chemical Society. All rights reserved.