Hyperchaos Numerical Simulation and Control in a 4D Hyperchaotic System

Figure 9

The power spectrums of the dynamic system when 𝑥=11.28, 𝑦=−11.21, 𝑧=−9, and 𝑤=20.49. (The red color stands for the power spectrum of 𝑥; the yellow color stands for the power spectrum of 𝑦; the blue color stands for the power spectrum of 𝑧; and the green color stands for the power spectrum of 𝑤.)

(a) The power spectrums of the dynamic system with 𝑎=0.98,𝑏=12,𝑐=6,𝑑=0.06,and𝑒=20

(b) The power spectrums of the dynamic system with 𝑎=0.9,𝑏=12,𝑐=6,𝑑=0.06,and𝑒=20

(c) The power spectrums of the dynamic system with 𝑎=0.9,𝑏=12,𝑐=6,𝑑=0.06,and𝑒=25

(d) The power spectrums of the dynamic system with 𝑎=0.9,𝑏=20,𝑐=8,𝑑=0.06,and𝑒=25