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Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 632712, 10 pages
Research Article

Synchronization of Unified Chaotic Systems Using Sliding Mode Controller

1Department of Electrical Engineering, Far East University, Tainan 74448, Taiwan
2Department of Biomedical Engineering, Hungkuang University, Taichung 43302, Taiwan

Received 29 September 2012; Accepted 21 November 2012

Academic Editor: Teh-Lu Liao

Copyright © 2012 Yi-You Hou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a method for synchronizing the unified chaotic systems via a sliding mode controller (SMC). The unified chaotic system and problem formulation are described. Two identical unified chaotic systems can be synchronized using the SMC technique. The switching surface and its controller design are developed in detail. Simulation results show the feasibility of a chaotic secure communication system based on the synchronization of the Lorenz circuits via the proposed SMC.