Four-Scroll Hyperchaotic Attractor in a Five-Dimensional Memristive Wien Bridge Oscillator: Analysis and Digital Electronic Implementation

Figure 6

(a) Time trace of the state variable x of the system while time elapsed. (b) Division of the interval of monotone dynamics: b(i) chaotic; b(ii) periodic. (c) Corresponding chaotic phase portrait: during time t < 600 s c(i) and c(ii) periodic phase portrait during regular motion t > 600 s (system parameters: , , , , , , , , ; initial state: ).

(a)

(b)

(c)

(d)