Active Control of Oscillation Patterns in the Presence of Multiarmed Pitchfork Structure of the Critical Manifold of Singularly Perturbed System

Figure 7

The selected points of the spiral-shaped sets 𝐴₋₁,  𝐴₀,  𝐴₁, and 𝐴_all for 𝑛=1,  ℎ(𝑡)≡1,  𝜇=1,  𝛿=0.1,  𝑇=0.5, and  𝜖=0.02 (from (a) to (d)).

(a)

(b)

(c)

(d)