Predictive adaptive control with linear models

João M. Lemos, Rui Neves-Silva, José M. Igreja

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The design of adaptive model predictive controllers that rely on discrete time, stochastic, linear models, are described. In order to compute the manipulated variable, a quadratic cost is minimized in a receding horizon sense. The fact that hard inequality constraints are not imposed, allows to express the control law in closed form, either as a feedback from a nonminimum plant state made of input/output samples or a discrete transfer function. The adaptation mechanism consists of the estimation of model parameters using recursive least squares, together with the assumption of the certainty equivalence principle. Different assumptions of the manipulated variable over the optimization horizon lead to different basic models and lead to the GPC and MUSMAR control algorithms. Modifications of the basic algorithms to include constraints on the mean-square value of the manipulated variable and to avoid adaptation transients, based on an approximate solution of the so-called dual problem are addressed. Experimental results on distributed collector solar fields as well as on plants with similar dynamics (such as superheated steam on a boiler and arc welding) are described, providing practical examples that serve as a guideline to configure the controllers.

Original languageEnglish
Title of host publicationAdvances in Industrial Control
PublisherSpringer International Publishing
Pages53-103
Number of pages51
Edition9783319068527
DOIs
Publication statusPublished - 2014

Publication series

NameAdvances in Industrial Control
Number9783319068527
ISSN (Print)1430-9491
ISSN (Electronic)2193-1577

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