DocumentCode :
27870
Title :
A robust non-linear feedback control strategy for a class of bioprocesses
Author :
Coutinho, Daniel ; Vande Wouwer, Alain
Author_Institution :
Dept. of Autom. & Syst., Univ. Fed. de Santa Catarina Florianopolis - SC, Florianopolis, Brazil
Volume :
7
Issue :
6
fYear :
2013
fDate :
April 11 2013
Firstpage :
829
Lastpage :
841
Abstract :
This study proposes a multiple-input/multiple-output robust approach to the control of bioprocesses based on a cascaded-loop strategy. The internal loop is a classical input-to-output feedback linearising controller which is obtained from the nominal dynamics of the bioprocess. Then, the outer loop is designed based on the internal model principle to obtain zero steady-state tracking error (and disturbance rejection) for constant signals while ensuring the robust stability of the overall closed-loop system. In addition, a robust Luenberger-like observer is proposed to estimate unmeasured state variables for the feedback linearising control law. The approach is applied to the simultaneous control of biomass and substrate concentrations in a perfusion/chemostat bioreactor, where the simulation results demonstrate the effectiveness of the proposed control strategy.
Keywords :
bioreactors; closed loop systems; feedback; nonlinear control systems; observers; robust control; tracking; biomass; bioprocess control; bioprocesses; cascaded-loop strategy; classical input-to-output feedback linearising controller; closed-loop system; constant signals; disturbance rejection; feedback linearising control law; internal loop; internal model principle; multiple-input/multiple-output robust approach; nominal dynamics; outer loop; perfusion bioreactor; robust Luenberger-like observer; robust nonlinear feedback control strategy; robust stability; simultaneous control; substrate concentrations; unmeasured state variables; zero steady-state tracking error;
fLanguage :
English
Journal_Title :
Control Theory & Applications, IET
Publisher :
iet
ISSN :
1751-8644
Type :
jour
DOI :
10.1049/iet-cta.2012.0336
Filename :
6555781
Link To Document :
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