Synchronization of chaotics systems using occasional driving

In this paper, we study the synchronization of chaotic systems using occasional driving technique-a modified Pecora-Carroll method. Unlike Pecora-Carroll method, to synchronize the chaotic driving and response systems, the driving signal only occasionally imposes to the response system, and we update the response variables with a time-interval of the imposing action period. Numerical analysis indicates that the occasional driving method is applicable to various dynamical systems and adds the degrees of freedom in selecting the driving variables. Furthermore, the method possesses robustness while it works.