Comment on 'Finite-time synchronization of Lorenz chaotic systems: theory and circuits'

摘要

In a recent paper, Louodop et al (2013 Phys. Scr. 88 045002), a family of feedback couplings which accomplish the synchronization of Lorenz chaotic systems was proposed based on Lyapunov stability theory. We point out that there is an error which is fundamental to the main result of the paper. Furthermore, the controller u= kh(e(1)) is complex and can be replaced by u = e(1), where h (xi) = Sigma(n)(i=0) a(2i+1)xi(2i+1).