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Self-Sustained Oscillation of a Photothermal-Responsive Pendulum under Steady Illumination

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  • Dali Ge
  • Peibao Xu
  • Kai Li

Abstract

Self-sustained oscillation has the advantages of harvesting energy from the environment and self-control, and thus, the development of new self-oscillating systems can greatly expand its applications in active machines. In this paper, based on conventional photothermal shrinkable material or photothermal expansive material, a simple pendulum is proposed. The light-powered self-sustained oscillation of the simple pendulum is theoretically studied by establishing a dynamic model of the photothermal-responsive pendulum. The results show that there are two motion modes of the simple pendulum, which are the static mode and the oscillation mode. Based on the photothermal-responsive model, this paper elucidates the mechanism of the self-excited oscillation. The condition for triggering self-excited oscillation is further studied. In addition, the influence of the system parameters on the amplitude and frequency is also obtained. This study may have potential applications in energy harvesting, signal monitoring, and soft machines.

Suggested Citation

  • Dali Ge & Peibao Xu & Kai Li, 2021. "Self-Sustained Oscillation of a Photothermal-Responsive Pendulum under Steady Illumination," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-12, February.
    • Handle: RePEc:hin:jnlmpe:5531530
    DOI: 10.1155/2021/5531530
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