<p>Dielectric electroactive polymers are soft materials with special properties: high deformation capacity, softness, lightness, and similarity of responses to electric stimuli with the biological muscles. They are thus studied with many applications in view such as artificial muscles, soft robot actuators or parts of artificial organs. They have demonstrated complex behaviours when excited by sinusoidal electric signals. In this work, it is shown that when powered by bio-inspired electronic oscillators (van der Pol, Grudzinski-Zebrowski, and Hindmarsh-Rose oscillators), the stretch dynamics is dominated by regular periodic bursts of different shapes, upwards stretch oscillations, downwards stretch oscillations depending on the shape of the potential energy, classical chaos, chaos with chaotic bursts or chaotic repetition of bursts. These dynamical behaviors are validated by the variation of the maximal Lyapunov exponent. Considering the effects of the stochastic variation of some model parameters, it has been found that the noises create noisy variation of the stretch for some cases while in other cases, the noises eliminate the chaotic dynamics leading to periodic states.</p>

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Responses of a dielectric electroactive polymer plate powered by electric signals generated by bio-inspired electronic oscillators

  • P. D. L. Kamseu,
  • P. Woafo

摘要

Dielectric electroactive polymers are soft materials with special properties: high deformation capacity, softness, lightness, and similarity of responses to electric stimuli with the biological muscles. They are thus studied with many applications in view such as artificial muscles, soft robot actuators or parts of artificial organs. They have demonstrated complex behaviours when excited by sinusoidal electric signals. In this work, it is shown that when powered by bio-inspired electronic oscillators (van der Pol, Grudzinski-Zebrowski, and Hindmarsh-Rose oscillators), the stretch dynamics is dominated by regular periodic bursts of different shapes, upwards stretch oscillations, downwards stretch oscillations depending on the shape of the potential energy, classical chaos, chaos with chaotic bursts or chaotic repetition of bursts. These dynamical behaviors are validated by the variation of the maximal Lyapunov exponent. Considering the effects of the stochastic variation of some model parameters, it has been found that the noises create noisy variation of the stretch for some cases while in other cases, the noises eliminate the chaotic dynamics leading to periodic states.