Coupled Adaptive Fuzzy Control of Nonlinear, Time‐Varying Plant

Article type: Research Article

Authors: Liutkevičius, Raimundas

Affiliations: Vytautas Magnus University, Vileikos 8, LT‐3035, Kaunas, Lithuania, e‐mail: r.liutkevicius@if.vdu.lt

Abstract: This paper analyses coupled control of a nonlinear, time‐varying plant. Uncoupled and coupled direct adaptive controllers, based on fuzzy logics, are synthesized to control the water level and the air pressure in a closed tank. The satisfactory efficiency of the controllers is experimentally demonstrated running the plant under the different working conditions. Coupled fuzzy controllers are compared with the uncoupled fuzzy controllers.

Keywords: nonlinear plant, fuzzy logic control, direct adaptive fuzzy control, coupled fuzzy control, rule base, level and pressure control

Journal: Informatica, vol. 14, no. 3, pp. 323-336, 2003