Unfalsified Control to a pH Neutralization Process with Noisy Measurements

Article Preview

Abstract:

In this paper, we demonstrate an application of unfalsified control to the nonlinear control of a pH neutralization in continuous stirred tank reactors under noisy measurements. The adaptation of controllers can be performed by two mechanisms: 1) The switching of an active controller in a current controller set and 2) An adaptive controller set generated by an evolutionary algorithm (EA) and a diversity operator. This leads to an automatic controller tuning for PI controller structure. Finally, we show that the proposed algorithm can handle highly nonlinear dynamics of the neutralization process with noisy measurements well.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

450-453

Citation:

Online since:

August 2015

Authors:

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2015 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] T.J. McAvoy and E. Hsu and S. Lowenthal, Dynamics of pH in Controlled Stirred Tank Reactor. Industrial & Engineering Chemistry Research 11, 68-70, (1972).

DOI: 10.1021/i260041a013

Google Scholar

[2] F.G. Shinskey, pH and pIon Control in Process and Waste Streams. Wiley: New York, (1973).

Google Scholar

[3] R.A. Wright and C. Kravaris, Strong Acid Equivalent Control of pH Processes. Industrial & Engineering Chemistry Research 30, 2437-2444, (1991).

DOI: 10.1021/ie00059a012

Google Scholar

[4] K.U. Klatt and S. Engell, Nonlinear Control of Neutralization Process by Gain-Scheduling Trajectory Control. Industrial & Engineering Chemistry Research 35, 3511-3518, (1996).

DOI: 10.1021/ie960033g

Google Scholar

[5] M.G. Safonov and T.C. Tsao, The unfalsified control concept and learning. IEEE Transactions on Automatic Control, 42(6): 843-847, (1997).

DOI: 10.1109/9.587340

Google Scholar

[6] T. Wonghong and S. Engell, Automatic Controller Tuning via Unfalsified Control. Journal of Process Control, 22: 2008-2025, (2012).

DOI: 10.1016/j.jprocont.2012.08.002

Google Scholar

[7] A.S. Morse and D.Q. Mayne and G.C. Goodwin, Application of Hysteresis Switching in Parameter Adaptive Control. IEEE Transactions on Automatic Control, 37: 1343-1354, (1992).

DOI: 10.1109/9.159571

Google Scholar

[8] T. Wonghong, Unfalsified Adaptive Control Algorithm to a pH Neutralization Process, In Proc. EEcon35, Nakornnayok, (2012).

Google Scholar

[9] A. Eiben and J. Smith, Introduction to Evolutionary Computing. Springer-Verlag, Berlin, (2003).

Google Scholar

[10] S. Engell and T. Tometzki and T. Wonghong, A New Approach to Adaptive Unfalsified Control. In Proc. European Control Conf., Kos, (2007).

DOI: 10.23919/ecc.2007.7069019

Google Scholar