Adaptive synchronization of a hyperchaotic L system based on extended passive control

This paper investigates the adaptive synchronization ofhyperchaotic Lü systems based on the method of extended passivecontrol. By combining the feedback control, the extended passivecontrol method with two output variables is developed, which cansynchronize hyperchaotic Lü systems asymptotically and globallymore easily without knowing the bound of state of the hyperchaoticsystem. Adaptive laws are introduced to estimate the unknownparameters as well. Simulation results show the effectiveness andflexibility of the proposed control scheme.