Chaos synchronization of coupled Duffing System via active disturbance rejection control

In this paper, the chaos synchronization of two coupled Duffing system via active disturbance rejection control is investigated. When the controller is not used, the synchronization will occur only if the coupling coefficient satisfies some condition. But when the condition is not satisfied, the synchronization can not be achieved. We adopt the active disturbance rejection control technique to accomplish the chaos synchronization without needing to consider the value of the coupling coefficient and the control scheme is robust to the total disturbance. The simulation results verify the validity of the proposed control approach.