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Variable structure TITO fuzzy-logic controller implementation for a solar air-conditioning system

Lygouras, John N. and Kodogiannis, Vassilis and Pachidis, Theodore and Tarchanidis, Kostas N. and Koukourlis, C.S. (2008) Variable structure TITO fuzzy-logic controller implementation for a solar air-conditioning system. Applied Energy, 85 (4). pp. 190-203. ISSN 0306-2619

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Official URL: http://dx.doi.org/10.1016/j.apenergy.2007.07.001

Abstract

The design and implementation of a Two-Input/Two-Output (TITO) variable structure fuzzy-logic controller for a solar-powered air-conditioning system is described in this paper. Two DC motors are used to drive the generator pump and the feed pump of the solar air-conditioner. The first affects the temperature in the generator of the solar air-conditioner, while the second, the pressure in the power loop. The difficulty of Multi-Input/Multi-Output (MIMO) systems control is how to overcome the coupling effects among each degree of freedom. First, a traditional fuzzy-controller has been designed, its output being one of the components of the control signal for each DC motor driver. Secondly, according to the characteristics of the system’s dynamics coupling, an appropriate coupling fuzzy-controller (CFC) is incorporated into a traditional fuzzy-controller (TFC) to compensate for the dynamic coupling among each degree of freedom. This control strategy simplifies the implementation problem of fuzzy control, but can also improve the control performance. This mixed fuzzy controller (MFC) can effectively improve the coupling effects of the systems, and this control strategy is easy to design and implement. Experimental results from the implemented system are presented.

Item Type:Article
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:6018
Deposited On:18 Feb 2009 12:48
Last Modified:14 Oct 2009 15:12

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