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Adaptive control for pH systems

โœ Scribed by Su Whan Sung; In-Beum Lee; Jin Young Choi; Jitae Lee

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
405 KB
Volume
53
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

In this study, an adaptive pH controller is proposed to control the pH process efficiently. Dissociation constant and total ion concentration of a fictitious weak acid are estimated to approximate the equilibrium characteristic of the pH process by the on-line recursive least-squares method and the pH value is controlled by a nonlinear proportionalintegral (PI) controller using the estimated process parameters. Simulation results show that the proposed control strategy promises to handle both the nonlinearities and time-varying characteristics of the pH process.

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