Table of Contents
Journal of Nonlinear Dynamics
Volume 2014, Article ID 842790, 7 pages
Research Article

Parameter Estimation and Hybrid Lag Synchronization in Hyperchaotic Lü Systems

School of Mathematical Sciences, Yancheng Teachers University, Yancheng 224002, China

Received 24 October 2013; Revised 19 February 2014; Accepted 26 February 2014; Published 30 March 2014

Academic Editor: Dibakar Ghosh

Copyright © 2014 Qing Wei and Zuolei Wang. 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.


The antiphase and complete lag synchronization of hyperchaotic Lü systems with unknown parameters is investigated. Based on the Lyapunov stability theory, the sufficient conditions for achieving hybrid lag synchronization are derived. The optimized parameter observers are approached analytically via adaptive control approach. Numerical simulation results are presented to verify the effectiveness of the proposed scheme.