Chaos synchronization of general Lorenz, Lü, and Chen chaotic systems by using active control and nonlinear control is studied in this paper. Active control method based on Hurwitz stability criterion with pole-placement scheme and nonlinear control based on Lyapunov stability theory are introduced to design controller to synchronize two identical chaotic systems. We demonstrate that a coupled general Lorenz, Lü, and Chen chaotic systems can be synchronized. Numerical simulations are used to show the effectiveness of the proposed control method.
