293709.fig.001a
(a)
293709.fig.001b
(b)
293709.fig.001c
(c)
293709.fig.001d
(d)
Figure 1: State trajectories of drive system (4.2) and response system (4.3), (a) signals and ; (b) signals and ; (c) signals and ; (d) the error signals between two identical Lü systems with different initial conditions under the controller (4.7).