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Journal of Control Science and Engineering
Volume 2011 (2011), Article ID 537491, 9 pages
http://dx.doi.org/10.1155/2011/537491
Research Article

Stabilization Using a Discrete Fuzzy PDC Control with PID Controllers and Pole Placement: Application to an Experimental Greenhouse

Unité de Recherche d'Analyse et Commande des Systèmes, Ecole Nationale d'Ingénieurs de Tunis, Campus Universitaire, Belvédère, BP 37, Tunis 1002, Tunisia

Received 11 November 2010; Revised 24 March 2011; Accepted 6 May 2011

Academic Editor: Onur Toker

Copyright © 2011 Amine Chouchaine et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper proposes a control strategy for complex and nonlinear systems, based on a parallel distributed compensation (PDC) controller. A solution is presented to solve a stability problem that arises when dealing with a Takagi-Sugeno discrete system with great numbers of rules. The PDC controller will use a classical controller like a PI, PID, or RST in each rule with a pole placement strategy to avoid causing instability. The fuzzy controller presented combines the multicontrol approach and the performance of the classical controllers to obtain a robust nonlinear control action that can also deal with time-variant systems. The presented method was applied to a small greenhouse to control its inside temperature by variation in ventilation rate inside the process. The results obtained will show the efficiency of the adopted method to control the nonlinear and complex systems.