Chaotic Motions of the Duffing-Van der Pol Oscillator with External and Parametric Excitations

<table>The phase portrait of system (<a href="https://static.hindawi.com/articles/sv/volume-2014/131637/figures/#EEq5">5</a>).</table>

Shock and Vibration

Figure 1: Chaotic Motions of the Duffing-Van der Pol Oscillator with External and Parametric Excitations 