Indirect adaptive nonlinear control of a pH process

S. S. Yoon; T. W. Yoon; D. R. Yang; T. S. Kang

doi:10.1016/S0098-1354(02)00088-1

Indirect adaptive nonlinear control of a pH process

S. S. Yoon, T. W. Yoon, D. R. Yang, T. S. Kang

Research output: Contribution to journal › Article › peer-review

27 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 language	English
Pages (from-to)	1223-1230
Number of pages	8
Journal	Computers and Chemical Engineering
Volume	26
Issue number	9
DOIs	https://doi.org/10.1016/S0098-1354(02)00088-1
Publication status	Published - 2002 Sept 15

Bibliographical note

Funding Information:
The authors are grateful to financial support by the Korea Science and Engineering Foundation (KOSEF), Korea.

Keywords

Adaptive control
Internal dynamics
Nonlinear control
Parameter estimation
pH control

ASJC Scopus subject areas

General Chemical Engineering
Computer Science Applications

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10.1016/S0098-1354(02)00088-1

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title = "Indirect adaptive nonlinear control of a pH process",

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.",

keywords = "Adaptive control, Internal dynamics, Nonlinear control, Parameter estimation, pH control",

author = "Yoon, {S. S.} and Yoon, {T. W.} and Yang, {D. R.} and Kang, {T. S.}",

note = "Funding Information: The authors are grateful to financial support by the Korea Science and Engineering Foundation (KOSEF), Korea. ",

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T1 - Indirect adaptive nonlinear control of a pH process

AU - Yoon, S. S.

AU - Yoon, T. W.

AU - Yang, D. R.

AU - Kang, T. S.

N1 - Funding Information: The authors are grateful to financial support by the Korea Science and Engineering Foundation (KOSEF), Korea.

PY - 2002/9/15

Y1 - 2002/9/15

N2 - 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.

AB - 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.

KW - Adaptive control

KW - Internal dynamics

KW - Nonlinear control

KW - Parameter estimation

KW - pH control

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U2 - 10.1016/S0098-1354(02)00088-1

DO - 10.1016/S0098-1354(02)00088-1

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SN - 0098-1354

VL - 26

SP - 1223

EP - 1230

JO - Computers and Chemical Engineering

JF - Computers and Chemical Engineering

IS - 9

ER -

Indirect adaptive nonlinear control of a pH process

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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