Lag Synchronization in Coupled Multistable van der Pol-Duffing Oscillators

Figure 1

Poincaré maps of the subsystems of (1) for different initial conditions and 𝜀=0. Maps (a)–(i) show periodic solutions, where the period is equal to number of dots on map multiplied by 2𝜋/0.962 (period of the excitation). The last map (j) represents quasiperiodic attractor.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)