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Oscillations, Waves, and Interactions - GWDG

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Complex dynamics of nonlinear systems 411<br />

Figure 4. Poincaré section of a chaotic attractor of Duffing’s equation (7) (d = 0.2, ω = 2,<br />

f = 54) generated by stroboscopic sampling of z1(n) = x(nT ) <strong>and</strong> z2(n) = ˙x(nT ) with the<br />

driving period T = 2π/ω. (a) Poincaré section of the full attractor (see Fig. 3k) <strong>and</strong> (b)<br />

section (zoom in) showing the underlying self-similar fractal structure.<br />

Figure 5. Bifurcation diagrams of the Duffing oscillator (7) with control parameter (a)<br />

driving frequency ω (d = 0.2, f = 23) <strong>and</strong> (b) driving amplitude f (d = 0.2, ω = 2).

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