State estimation for nonlinear coupled complex dynamical networks with time delay

The state estimation of nonlinear coupled complex dynamical networks with time delay coupling is studied in this paper. The state estimation controllers are designed by using proportional control approach. A sufficient condition for state estimation is derived by using Lyapunov stability theory. Finally, we take the scale-free network as the network topology and the Lorenz chaotic system as the node dynamics, to do some simulations. The simulation results verify the effectiveness of the proposed method.