The extended Kalman filter as a noise modulator for continuous yeast cultures under monotonic, oscillating and chaotic conditions

Patnaik, P R (2005) The extended Kalman filter as a noise modulator for continuous yeast cultures under monotonic, oscillating and chaotic conditions. Chemical Engineering Journal, 108 (1-2). pp. 91-99. ISSN 13858947

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Abstract

The extended Kalman filter (EKF) is commonly used to filter out the inflow of noise into biological reactors. Its usefulness for bioreactors with monotonic outputs is well established. More recently, the EKF has been shown to be able to rescue stable periodic oscillations that have been distorted by noise. This study extends the use of the EKF to microbial oscillations that become chaotic under the influence of noise. As measured by the Lyapunov exponents of the noise-free and noise-filtered concentration profiles of a continuous culture of Saccharomyces cerevisiae, the filter is effective in recovering noise-free sustained oscillations from noise-induced chaos, but is less satisfactory for a culture with both deterministic and stochastic chaos. Other kinds of filters, employing artificial intelligence, are recommended in this case.

Item Type:	Article
Additional Information:	Copyright of this article belongs to Elsevier Science.
Uncontrolled Keywords:	Extended Kalman filter; Continuous culture; Inflow noise; Oscillations; Chaos
Subjects:	Q Science > QD Chemistry
Depositing User:	Dr. K.P.S.Sengar
Date Deposited:	15 Feb 2012 14:39
Last Modified:	09 Jan 2015 09:57
URI:	http://crdd.osdd.net/open/id/eprint/989

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