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Dissolved oxygen level output feedback control based on discrete-time measurements during a Pseudomonas putida mt-2 fermentation

  • In this paper, the problem of controlling the dissolved oxygen level (DO) during an aerobic fermentation is considered. The proposed approach deals with three major difficulties in respect to the nonlinear dynamics of the DO, the poor accuracy of the empirical models for the oxygen consumption rate and the fact that only sampled measurements are available on-line. A nonlinear integral high-gain control law including a continuous-discrete time observer is designed to keep the DO in the neighborhood of a set point value without any knowledge on the dissolved oxygen consumption rate. The local stability of the control algorithm is proved using Lyapunov tools. The performance of the control scheme is first analyzed in simulation and then experimentally evaluated during a successfull fermentation of the bacteria over a period of three days. Pseudomonas putida mt-2

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Author:Olivier Gehan, Eric Pigeon, Tomas Menard, Ridha Mosrati, Mathieu Pouliquen, Lamine M. Fall, Johannes ReuterORCiD
Parent Title (English):Journal of Process Control
Volume:Vol. 79
Document Type:Article
Year of Publication:2019
Release Date:2019/11/25
Tag:Aerobic fermentation; DO control; Continuous-discrete time observer; Nonlinear output feedback
First Page:29
Last Page:40
Institutes:Institut für Systemdynamik - ISD
Relevance:Peer reviewed Publikation in Master Journal List
Open Access?:Nein
Licence (German):License LogoUrheberrechtlich geschützt