Variable Gain Takagi–Sugeno Fuzzy Logic Controllers

Article type: Research Article

Authors: Rajesh, Reghunadhan^; | Kaimal, M. Ramachandra^;

Affiliations: Dept. of Computer Science and Engg., Bharathiar University, Coimbatore 641046, India | Dept. of Computer Science, University of Kerala, Thiruvananthapuram 695581, India, e-mail: kollamrajeshr@ieee.org

Abstract: Most of the Takagi–Sugeno Fuzzy (TSF) systems found in the literature have only used linear functions of input variables as rule consequent and can be called as TSF Models with Fixed Coefficient (TSFMFC). This paper presents TSF model with variable coefficient (TSFMVC) which can more closely approximate a class of nonlinear systems, nonlinear dynamic systems, and nonlinear control systems. It is also shown that TSFMFC is a special case of TSFMVC. Moreover Variable Gain TSF Controller (VGTSFC) is defined and it performs better, as shown by the simulation results, when compared with Fixed Gain TSF Controller (FGTSFC).

Keywords: fuzzy controller, Takagi–Sugeno fuzzy models with fixed coefficient, Takagi–Sugeno fuzzy models with variable coefficient, fixed gain Takagi–Sugeno fuzzy controller, variable gain Takagi–Sugeno fuzzy controller

Journal: Informatica, vol. 17, no. 3, pp. 427-444, 2006