An Adaptive GMC Algorithm in Application to pH Process

Author:	Stebel Krzysztof, Silesian University of Technology, Poland
Topic:	6.1 Chemical Process Control
Session:	Process Control Applications
Keywords:	: identification algorithms; algorithms; pH control; control applications; model approximation; adaptive algorithms

Abstract

Key point of this paper is two-stage identification of block-oriented model and GMC control based on it. Important issue is that GMC algorithm is based on polynomial approximation of pH model. The main advantage of such solution is a simple form of GMC control law without loosing his functionality that has algorithms of this type. Three-segment polynomial approximations are used for static nonlinear characteristic. On-line identification allows fine-tuning of the model and robust control can be obtained.