Neural networks-based adaptive control for a class of nonlinear bioprocesses

Authors:
Emil Petre;Dan Selişteanu;Dorin Şendrescu;Cosmin Ionete
Affiliations:
University of Craiova, Department of Automatic Control, A.I. Cuza 13, Craiova, Romania;University of Craiova, Department of Automatic Control, A.I. Cuza 13, Craiova, Romania;University of Craiova, Department of Automatic Control, A.I. Cuza 13, Craiova, Romania;University of Craiova, Department of Automatic Control, A.I. Cuza 13, Craiova, Romania
Venue:
Neural Computing and Applications - Special Issue - KES2008
Year:
2010

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Abstract

The paper studies the design and analysis of a neural adaptive control strategy for a class of square nonlinear bioprocesses with incompletely known and time-varying dynamics. In fact, an adaptive controller based on a dynamical neural network used as a model of the unknown plant is developed. The neural controller design is achieved by using an input–output feedback linearization technique. The adaptation laws of neural network weights are derived from a Lyapunov stability property of the closed-loop system. The convergence of the system tracking error to zero is guaranteed without the need of network weights convergence. The resulted control method is applied in a depollution control problem in the case of a wastewater treatment bioprocess, belonging to the square nonlinear class, for which kinetic dynamics are strongly nonlinear, time varying and not exactly known.