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

Figure 8

The phase portrait of system (3) for 𝑡≥𝑇 with ℎ(𝑡)≡const and 𝑛=1. The solutions of (1) lying in the time 𝑡=𝑇 on the orbits with arrows are nonoscillatory, and lim_𝑡→∞𝑦_𝜖(𝑡)=ℎ or −ℎ.