Model Reference Control of Hyperchaotic Systems

Figure 3

The estimation of the uncertain parameters: (a) 𝑎 is the estimation of 𝑎; (b) 𝑏̂ is the estimation of 𝑏; (c) 𝑐̂ is the estimation of 𝑐; (d) 𝑑 is the estimation of 𝑑.

(a) The estimation of 𝑎

(b) The estimation of 𝑏

(c) The estimation of 𝑐

(d) The estimation of 𝑑