DII-Based Linear Feedback Control Design for Practical Synchronization of Chaotic Systems with Uncertain Input Nonlinearity and Application to Secure Communication

Figure 4

Synchronization errors of systems (2.1a)–(2.1d) and (2.2a)–(2.2d), with 𝑎=0.4 and Δ𝜙_𝑖(𝑢_𝑖)=𝑢_𝑖,∀𝑖∈{1,2,3}, under the control proposed in [8].