A fuzzy logic and variable structure based controller for pH control

Author

Zárate, Luis E. ; Resende, Peterson ; Menezes, Benjamin

Author_Institution

Pontifical Catholic Univ. of Minas Gerais, Brazil

Volume

1

fYear

2001

fDate

2001

Firstpage

37

Abstract

The pH control is a difficult problem to solve. This is due strong nonlinearities and extreme sensitivity to disturbances in the process. The possible combination of the variable structure system with fuzzy logic theory for the pH problem is treated. This paper shows how this theory can improve the variable structure controller applied to this process. A Smith predictor is utilized to account for the pH process time delay. This paper proposes the controller gains adjustment by means of fuzzy logic. The simulation results obtained are presented

Keywords

chemical industry; delays; fuzzy control; pH control; predictive control; process control; variable structure systems; Smith predictor; continuous stirred tank reactors; control nonlinearities; fuzzy control; fuzzy logic; pH control; predictive control; process control; sliding modes; time delay; variable structure system; Chemical industry; Continuous-stirred tank reactor; Delay effects; Fuzzy logic; Fuzzy sets; Performance gain; Sliding mode control; Uncertain systems; Variable structure systems; Wastewater treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE

Conference_Location

Denver, CO

Print_ISBN

0-7803-7108-9

Type

conf

DOI

10.1109/IECON.2001.976450

Filename

976450