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<p>Marine organisms' unique movement mechanisms and morphological and structural features provide important innovative insights for bionic actuation technology. Inspired by the teeth structure of the sea urchin, a radial bending resonant piezoelectric actuator with staggered motion characteristics (SRB-RPA) is developed, which is designed as the thin metal plate with size of 24&#xa0;mm × 24&#xa0;mm × 3&#xa0;mm and realizes the clamping-feeding-releasing based on the staggered motion of the two pairs of driving teeth through the coupling effect of the radial vibrational modes and the bending vibrational modes. Subsequently, it was analyzed using finite element analysis (FEA). The experimental results show that at a voltage of 280&#xa0;V and a frequency of 27.7&#xa0;kHz, it achieves a forward velocity of 68.37&#xa0;mm/s, a forward thrust force of 116.81 mN, and a displacement resolution of 0.68&#xa0;μm, and a backward velocity of 63.18&#xa0;mm/s, a thrust force of 103.76 mN, and a resolution of 0.75&#xa0;μm. The simulation and experimental results confirm that the proposed SRB-RPA's interleaved drive scheme is effective and provides a new technical solution for the performance optimization of linear piezoelectric actuators.</p>

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Design and Performance Analysis of Radial Bending Resonant Piezoelectric Actuator with Staggered Motion Characteristics Inspired by Sea Urchin’s Teeth Morphology

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Gen Wang,
  • Yuming Shao,
  • Jiawei Zhuang,
  • Xinjie Wang,
  • Fuxian Liu,
  • Jianhui Li,
  • Yujuan Tang

摘要

Marine organisms' unique movement mechanisms and morphological and structural features provide important innovative insights for bionic actuation technology. Inspired by the teeth structure of the sea urchin, a radial bending resonant piezoelectric actuator with staggered motion characteristics (SRB-RPA) is developed, which is designed as the thin metal plate with size of 24 mm × 24 mm × 3 mm and realizes the clamping-feeding-releasing based on the staggered motion of the two pairs of driving teeth through the coupling effect of the radial vibrational modes and the bending vibrational modes. Subsequently, it was analyzed using finite element analysis (FEA). The experimental results show that at a voltage of 280 V and a frequency of 27.7 kHz, it achieves a forward velocity of 68.37 mm/s, a forward thrust force of 116.81 mN, and a displacement resolution of 0.68 μm, and a backward velocity of 63.18 mm/s, a thrust force of 103.76 mN, and a resolution of 0.75 μm. The simulation and experimental results confirm that the proposed SRB-RPA's interleaved drive scheme is effective and provides a new technical solution for the performance optimization of linear piezoelectric actuators.