An adaptive fuzzy observer-based approach for chaotic synchronization

Authors:
Chen-Sheng Ting
Affiliations:
Department of Electrical Engineering, National Huwei University of Science and Technology, Huwei, Yunlin, Taiwan 632, ROC
Venue:
International Journal of Approximate Reasoning
Year:
2005

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Abstract

This paper presents an adaptive fuzzy observer design to synchronize chaotic systems. The chaotic system is expressed in the form of Takagi-Sugeno fuzzy model (T-S fuzzy system), which considers the effect of model mismatches. Based on this model, an adaptive fuzzy observer is developed to deal with the synchronization of nonidentical chaotic systems. In contrast to the framework of parallel distributed compensation for T-S fuzzy system, the proposed method does not rely on the existence of common matrix P which is imposed in stability conditions. The computer simulation examines the performance of two well-known chaotic systems, Lorenz system and Chua circuit. The results show that the proposed approach cannot only attain synchronization but also is robust to parameter perturbations in the drive system.