Fractional-Order Hidden Attractor Based on the Extended Liu System

Figure 11

Time series of the state variables of system (4) with a = 10, b = 40, c = 2.5, k = 1, h = 4,  = 5, d = 20, and m = 1; the blue trajectories with X (0) = (2.2, 2.4, 0.8, 0) and the orange trajectories converge to zero with X (0) = (0, 0, 0.3, 0.1): (a) the state x, (b) the state y, (c) the state z, and (d) the state .

(a)

(b)

(c)

(d)