Adaptive synchronization of Chua's circuits with fully unknown parameters

This study addresses adaptive synchronization of the original Chua's circuit and the modified Chua's circuit with x∣x∣ when the parameters of the drive system are fully unknown and different with those of the response system. Based on Lyapunov stability theory, the sufficient conditions for the synchronization have been derived theoretically. Numerical simulations are presented to verify that synchronization can be achieved by using this approach.