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Title: A reset observer with discrete/continuous measurements for a class of fuzzy nonlinear systems
Author: Guillen-Flores, C.P.
Castillo-Toledo, B.
Garcia-Sandoval, J.P.
Di Gennaro, S.
Gonzalez Alvarez, V.
Issue Date: 2013
Abstract: This paper proposes the design of a reset fuzzy observer for the class of nonlinear systems able to be described by a Takagi-Sugeno fuzzy model. The observer uses both continuous and discrete measurements and in contrast with the observers based on the First Order Reset Element (FORE), it updates its states resetting the initial condition of the integrator at each instant when the discrete measurements are available. The proposed fuzzy observer is applied to estimate the substrate and biomass concentration of an anaerobic wastewater treatment process and the effectiveness of the proposed method is tested by simulations comparing the results of a reset fuzzy observer with two fuzzy observers using continuous measurements only. Finally, the estimation scheme is validated using experimental data from an actual anaerobic digestion process, suggesting that the proposed reset fuzzy observer is a practical and encouraging approach to the state estimation of the class nonlinear processes under study. 2013 The Franklin Institute.
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