TSK MODEL-BASED FUZZY LOGIC CONTROL OF CARBON DIOXIDE CONCENTRATION IN ROOMS

Snejana Yordanova

Keywords

Carbon dioxide concentration, genetic algorithms, MATLAB™ real-time control, parallel distributed compensation, stability analy-sis, Takagi–Sugeno–Kang modelling

Abstract

The proper carbon dioxide concentration in premises is one of the factors for the indoor climate comfort. Its control via ventilation depends on the quality of the fresh air used and is accompanied by high energy consumption. The plant is nonlinear with no reliable and simple plant model which makes the design of a linear controller difficult. The model-free fuzzy logic controllers (FLCs) successfully tackle such problems. In the present paper, an FLC based on the principle of parallel distributed compensation is designed to enhance the controller’s tuning, to further improve the control system performance and energy efficiency and to enable its stability analysis. It uses a Takagi–Sugeno–Kang plant model derived from plant input–output experimental data with the help of genetic algorithms optimization.

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