Title: A new type-2 fuzzy modelling and identification for electrophysiological signals: a comparison between PSO, BBO, FA and GA approaches
Authors: Mohammed Assam Ouali; Mouna Ghanai; Kheireddine Chafaa
Addresses: LAAAS, Electronics Department, Faculty of Technology, University Mostefa BenBoulaid, Batna 2, Algeria ' LAAAS, Electronics Department, Faculty of Technology, University Mostefa BenBoulaid, Batna 2, Algeria ' LAAAS, Electronics Department, Faculty of Technology, University Mostefa BenBoulaid, Batna 2, Algeria
Abstract: In this investigation a novel type-2 fuzzy model for electrophysiological signals is presented. It is based on interval type-2 fuzzy systems. This method can deal with the curve fitting and computational time problems of type-2 fuzzy systems. This approach will significantly reduce the number of type-2 fuzzy rules and simultaneously preserve the fitting quality. The proposed model comprises a parallel interconnection of two type-2 sub-fuzzy models. The first is the primary model, which represents an ordinary model with a low resolution for the electrophysiological signal under consideration, the second is a fuzzy sub-model called the error model, which represents uncertainty in the primary model. Identification is achieved by innovative metaheuristic optimisation algorithms. The method's effectiveness is evaluated through testing on synthetic and real ECG signals. In addition, a detailed comparative study with several benchmark methods will be given. Intensive computer experimentations confirm that the proposed method can significantly improve convergence and resolution.
Keywords: electrophysiological signals; electrocardiogram; ECG; time series fitting; type-2 fuzzy logic; metaheuristics algorithms.
International Journal of Modelling, Identification and Control, 2018 Vol.29 No.2, pp.163 - 184
Received: 13 Feb 2017
Accepted: 16 Aug 2017
Published online: 08 Mar 2018 *