Title: Reconfigurable adaptive fuzzy fault-hiding control for greenhouse climate control system

Authors: Essam I. El-Madbouly; Ibrahim A. Hameed; Mohamed I. Abdo

Addresses: Department of Industrial Electronics and Control Engineering, Faculty of Electronic Engineering, Menofia University, Menouf, 32952, Egypt ' Department of Industrial Electronics and Control Engineering, Faculty of Electronic Engineering, Menofia University, Menouf, 32952, Egypt; Department of Automation Engineering, Norwegian University of Science and Technology (NTNU) Ålesund, Larsgårdsvegen 2, 6009 Ålesund, Norway ' Department of Industrial Electronics and Control Engineering, Faculty of Electronic Engineering, Menofia University, Menouf, 32952, Egypt

Abstract: Modern greenhouses are equipped with various components for providing a comfortable climate for plant growth. A greenhouse component malfunction may significantly crumble the greenhouse performance and hence result in loss of production. Therefore, it is required to design a control system, which is stable, and is able to provide an acceptable performance even in a severe fault situation. In this paper, an active fault-tolerant control scheme to compensate for actuator and/or sensor faults in the greenhouse climate system is designed. The proposed control system consists of a self-tuned fuzzy PI control system, a sensitive and reliable observer-based fault detection and diagnosis (FDD) mechanism for different types of faults in the presence of system disturbances, and a robust fault-hiding-based reconfigurable control design able to compensate for faulty effects. In this approach, a set of virtual sensors and actuators are used to restore the closed-loop stability and to ensure accurate tracking of reference inputs. The efficiency of the proposed approach has been demonstrated through a set of simulation experiments on a nonlinear multi-input multi-output greenhouse climate system.

Keywords: fault-tolerant control; FTC; control reconfiguration; fault detection and isolation; FDI; fault accommodation; Luenberger observer; reconfigurable control; adaptive control; fuzzy control; fuzzy logic; greenhouses; greenhouse climate control; actuator faults; sensor faults; PI control; nonlinear MIMO; fault tolerance.

DOI: 10.1504/IJAAC.2017.083297

International Journal of Automation and Control, 2017 Vol.11 No.2, pp.164 - 187

Received: 26 Dec 2015
Accepted: 07 May 2016
Published online: 23 Mar 2017 *

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