Nonlinear system identification by fuzzy piecewise affine models

Mohamed, H.A.F. and Askari, M. and Moghavvemi, M. and Yang, S.S. (2008) Nonlinear system identification by fuzzy piecewise affine models. In: SICE Annual Conference 2008 - International Conference on Instrumentation, Control and Information Technology, 20 - 22 August 2008, Tokyo, Japan.

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In this paper, a new identification method of a piecewise affine model for a nonlinear system based on input-output data measurements is presented. In particular the identification of piecewise affine models of nonlinear single-input-single-output systems through Takagi-Sugeno models is considered. The basic idea in this paper is to decompose the nonlinear system into a set of piecewise affine systems. First, the least mean square method is used to identify the system in the neighborhood of each data point. Then the obtained parameter vectors are classified into groups. The center point of each group is considered as the parameter vector of the corresponding submodel. Groups are considered as fuzzy sets and their membership functions values at each data point is calculated using the distance between the parameter vector, which corresponds to the data point, and the center point. Using interpolation, the value of each membership function can be calculated at all points. Finally, the estimated output is obtained by Takagi-Sugeno fuzzy inference.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Article number 4654912 ISBN: 978-490776429-6 DOI: 10.1109/SICE.2008.4654912
Uncontrolled Keywords: Hybrid systems; Nonlinear identification; Piecewise affine systems; Takagi-Sugeno fuzzy systems; Basic ideas; Center points; Data points; Hybrid systems; Identification methods; Least mean square methods; Nonlinear identification; Nonlinear system identifications; Output datums; Output systems; Parameter vectors; Piecewise affine models; Piecewise affine systems; Sub models; Sugeno models; Takagi-Sugeno fuzzy systems
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Ms. Norhamizah Tamizi
Date Deposited: 27 Mar 2014 07:20
Last Modified: 23 Nov 2017 02:11

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