Abstract This paper investigates a passive self-tuning piezoelectric energy harvester based on a beam-slider structure. The hardening nonlinearity is imparted to the system by two repulsive magnets to achieve broad bandwidth. The slider on the slightly tilted cantilever beam can automatically move along the beam to destabilize the low-energy orbit and track the high-energy orbit. The results of simulation and experiments show that the proposed design enables the nonlinear energy harvester to acquire a high energy converting efficiency and possess the anti-interference ability. In the frequency range of 21Hz-23Hz, the output power is enhanced by more than 25 times over the case with fixed mass at the free end. The tuning process is completely passive without any active actuators or sensors, which provides a promising method for designing an efficient nonlinear vibration energy harvester.

中文翻译：

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基于光束滑块结构的压电无源自调谐能量采集器

摘要 本文研究了一种基于梁滑块结构的无源自调谐压电能量收集器。硬化非线性通过两个排斥磁体赋予系统以实现宽带宽。微倾斜悬臂梁上的滑块可自动沿梁移动，使低能轨道不稳定，跟踪高能轨道。仿真和实验结果表明，所提出的设计使非线性能量采集器能够获得较高的能量转换效率并具有抗干扰能力。在21Hz-23Hz频率范围内，输出功率比自由端固定质量的情况提高25倍以上。调谐过程是完全被动的，没有任何主动执行器或传感器，