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

Figure 6

Extended recursive backstepping tracking control of hyperchaotic Lorenz system for 𝑓(𝑡)=35cos0.57𝑡 when the controller is activated at𝑡=50. The parameters of the system are as shown in Figure 2 with 𝜀₁=𝜀₂=0.7 and 𝜀₃=𝜀₄=0.8.

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