Research on triboelectric energy harvesting has advanced significantly in the last several years. Simultaneous harvesting and vibration control is now a new trend. This paper presents a novel triboelectric energy harvester (TEH), which consists of a cantilever beam with a rigid curved surface as a stop on either side whose geometric shape is described by a polynomial, inspired by a type of nonlinear vibration absorbers. In this design, the TEH proposed shows a new operation mode, that is, face-to-face gradual contact and separation. A variable capacitance between the beam and the curved stop is derived. Such an operation mode of a TEH has not been seen in the open literature. The proposed TEH extracts energy, and ‘absorbs’ vibration when its own amplitude-varying natural frequencies match that of the excitation. The collisions between the beam and a rigid stop are gentle because of its distinct gradual contact mode, which differs from the conventional contact-separation type TEH structure. As a result, the proposed TEH would experience fewer or less severe impact events, thus reducing wear and extending its useful service life.

中文翻译：

---

具有曲面接触面的可变刚度摩擦电能量收集器的理论和实验研究


在过去的几年里，摩擦电能量收集的研究取得了长足的进步。同时收割和振动控制现在是一种新趋势。本文提出了一种新型的摩擦电能量收集器 （TEH），它由悬臂梁组成，其几何形状由多项式描述，灵感来自一种非线性减振器。在这个设计中，提出的 TEH 展示了一种新的操作模式，即面对面的逐渐接触和分离。推导出光束和弯曲光阑之间的可变电容。TEH 的这种操作模式在公开文献中尚未出现。拟议的 TEH 提取能量，并在其自身的振幅变化固有频率与激励的固有频率匹配时“吸收”振动。由于其独特的渐进接触模式，梁和刚性挡块之间的碰撞是温和的，这与传统的接触分离型 TEH 结构不同。因此，拟议的 TEH 将经历更少或更少的严重冲击事件，从而减少磨损并延长其使用寿命。