Indirect adaptive nonlinear control of a pH process

S. S. Yoon, Tae Woong Yoon, Dae Ryook Yang, T. S. Kang

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

This paper presents an indirect adaptive control scheme for a pH process, which is difficult to control due to its nonlinear dynamics with uncertainties. A nonlinear controller is designed using a backstepping technique, which can deal with a large class of nonlinear systems with parametric uncertainties. The nonlinear controller is combined with a parameter estimator to estimate the concentrations of the reaction invariants in the wastewater stream, and the stability of the proposed adaptive scheme is proved. Simulations show that uniform closed-loop performance is obtained despite the nonlinearitics and parametric uncertainties.

Original languageEnglish
Pages (from-to)1223-1230
Number of pages8
JournalComputers and Chemical Engineering
Volume26
Issue number9
DOIs
Publication statusPublished - 2002 Sep 15

Fingerprint

Controllers
Backstepping
Nonlinear systems
Wastewater
Uncertainty

Keywords

  • Adaptive control
  • Internal dynamics
  • Nonlinear control
  • Parameter estimation
  • pH control

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Control and Systems Engineering

Cite this

Indirect adaptive nonlinear control of a pH process. / Yoon, S. S.; Yoon, Tae Woong; Yang, Dae Ryook; Kang, T. S.

In: Computers and Chemical Engineering, Vol. 26, No. 9, 15.09.2002, p. 1223-1230.

Research output: Contribution to journalArticle

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