Observer based projective reduced-order synchronization of different chaotic systems with unknown parameters

This paper studies the projective reduced-order synchronization of different chaotic systems with unknown parameters. According to the observer theory, the reduced-order observer is designed. The adaptive control technique is applied to the proposed observer. Projective synchronization between hyperchaotic Chen system and Rossler system with unknown parameters are achieved based on the proposed observer. Numerical simulations confirm the effectiveness of the proposed method.