Research Article

Multiswitching Synchronization of a Driven Hyperchaotic Circuit Using Active Backstepping

Figure 4

Error dynamics for the unified and periodically forced Van der Pol-Duffing oscillator of the system state for with controller defined in (30) when the control was activated at for (a) , (b) , and (c) .
918586.fig.004a
(a)
918586.fig.004b
(b)
918586.fig.004c
(c)