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Fuzzy Sliding Mode Controller for a PH Process in Stirred Tanks


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Abstract

The pH control is a difficult problem. This is due to the strong non-linearity and extreme sensitivity to disturbances in the neighborhood of the neutrality point. A Fuzzy Sliding Mode Controller (FSMC) which combines a Variable Structure Control with sliding modes (VSC) and the fuzzy logic theory to adjust the controller gains, for pH control (neutralization and regulation), is presented in this work. The FSMC was designed by considering the non-linearities and the uncertainties of the pH process. The controller uses the Smith predictor structure to deal with the effect of the time delay characteristic of this kind of process. It is shown how the FSMC can improve the response of the conventional VSC applied to pH process It will be possible to observe that the required times to reach the steady-state is significantly improved. Simulation results for the pH process are presented with comparisons between the VSC and FSMC.


Keywords


Pages

Total Pages: 19
Pages: 349-367

DOI
10.1080/10798587.2012.10643248


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Published

Volume: 18
Issue: 4
Year: 2012

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References

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JOURNAL INFORMATION


ISSN PRINT: 1079-8587
ISSN ONLINE: 2326-005X
DOI PREFIX: 10.31209
10.1080/10798587 with T&F
IMPACT FACTOR: 0.652 (2017/2018)

TWO YEAR CITATIONS PER DOCUMENT (SJR DATA): 0.993 (2018)
SJR: "The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric."





Journal: 1995-Present


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