Synchronization of fractional order chaotic systems using active control method

In this article, the active control method is used for synchronization of two different pairs of fractional order systems with Lotka-Volterra chaotic system as the master system and the other two fractional order chaotic systems, viz.. Newton-Leipnik and Lorenz systems as slave systems separately. The fractional derivative is described in Caputo sense. Numerical simulation results which are carried out using Adams-Bashforth-Moulton method show that the method is easy to implement and reliable for synchronizing the two nonlinear fractional order chaotic systems while it also allows both the systems to remain in chaotic states. A salient feature of this analysis is the revelation that the time for synchronization increases when the system-pair approaches the integer order from fractional order for Lotka-Volterra and Newton-Leipnik systems while it reduces for the other concerned pair. (C) 2012 Elsevier Ltd. All rights reserved.