Adaptive generalized projective synchronization in different chaotic systems based on parameter identification

In this Letter. the generalized projective synchronization of different chaotic systems with unknown parameters is investigated. By Lyapunov stability theory. the adaptive control method is proposed to achieve above synchronization phenomenon. Meanwhile, according to the invariance principle of differential equations, unknown parameter can be estimated accurately. The schemes are successfully applied to two groups of examples: the anti-phase synchronization between Lorenz system and Chen system; the complete synchronization between hyper-chaotic system and -eneralized Loren system. The corresponding numerical results are presented to verify the effectiveness of this method. (c) 2007 Elsevier B.V. All rights reserved.