Control and Synchronization of Chaotic and Hyperchaotic Lorenz Systems via Extended Backstepping Techniques

Figure 8

Error dynamics between the two chaotic Lorenz systems with the controller deactivated for 0<𝑡<50 and activated for 𝑡≥50. The parameters of the system are as shown in Figure 1 with 𝜀_𝑖=0.3, where 𝑖=1,2,3.

(a)

(b)

(c)

(d)