Synchronization of two different non-autonomous chaotic systems using fuzzy disturbance observer

In this Letter, an output error feedback control scheme is addressed for synchronization of a class of non-autonomous chaotic systems based on the drive-response framework. A fuzzy disturbance observer is used to compensate for the difference between the structures of two different systems. To compensate for the uncertainty caused by the unknown phase difference between the drive and the response systems, an adaptive control scheme is employed that is based on the Lyapunov stability theory. Numerical simulations are presented to illustrate the effectiveness of the proposed method. (C) 2010 Elsevier B.V. All rights reserved.