Title: Evolutionary design of efficient type-2 fuzzy models from noisy data using hybrid PSO model

Authors: Mamta Khosla; R.K. Sarin; Moin Uddin

Addresses: Dr. B.R. Ambedkar National Institute of Technology, Jalandhar-144011, India ' Dr. B.R. Ambedkar National Institute of Technology, Jalandhar-144011, India ' Delhi Technological University, Delhi-110042, India

Abstract: This work presents an efficient framework for designing type-2 fuzzy models from noisy data that represent majority of the real-world databases used for building models. The framework is based on the use of a hybrid particle swarm optimisation (PSO) model that combines the traits of gbest and lbest PSO variants for getting fast results and at the same time avoiding premature convergence. Two major components of the framework, i.e., the encoding mechanism, and the hybrid PSO model have been discussed. Further, two benchmark problems that cover major application domains of type-2 FLSs viz. forecasting and classification, have been presented to demonstrate the effectiveness of the proposed methodology. For each noisy benchmark data, type-1 fuzzy model is also designed and its performance is compared with the designed type-2 fuzzy model with an objective to exhibit better noise handling capability of type-2 models.

Keywords: type-2 fuzzy logic; evolutionary design; hybrid PSO; particle swarm optimisation; time-series forecasting; iris data classification; fuzzy modelling; forecasting; noisy data; noise handling.

DOI: 10.1504/IJSI.2014.060242

International Journal of Swarm Intelligence, 2014 Vol.1 No.2, pp.156 - 178

Received: 01 Apr 2013
Accepted: 26 Jul 2013
Published online: 02 Jul 2014 *

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