Piezoelectric energy harvesters typically exhibit sharp output power peak around resonance frequency (small bandwidth), which presents complexity in harvesting ambient vibrations. Prior attempts in designing energy harvesters with broadband response have met with practical challenges in terms of low output power, large mass and weight, and small improvements in bandwidth. Here, we report a breakthrough in demonstrating ultra-wide bandwidth piezoelectric energy harvesters through the automatic resonance tuning (ART) phenomenon. ART provides energy harvester ability to adjust its natural frequency in conjunction with ambient vibration without human intervention or additional tuning energy. The ART energy harvester utilizes the motion of the mobile proof mass in a doubly clamped oscillating beam structure to modulate the natural frequency of the beam. Detailed investigations are conducted in providing a fundamental understanding of the operation mechanism of the ART harvester by invoking beam dynamics over a wide range of vibration conditions. It is shown that bandwidth of the ART harvester (36 Hz) is 1400% larger compared to the fixed resonance energy harvester. The practical feasibility of the ART mechanism is demonstrated by evaluating the performance of harvester mounted on a rotary pump. The results demonstrate that ART mechanism can provide the much-needed breakthrough in the deployment of mechanical energy harvesters.

压电能量采集器通常在谐振频率（小带宽）附近显示出尖锐的输出功率峰值，这在采集环境振动时会带来复杂性。在设计具有宽带响应的能量收集器方面，先前的尝试在输出功率低，质量大，重量大，带宽改进小等方面遇到了实际挑战。在这里，我们报告了通过自动共振调谐（ART）现象展示超宽带压电能量收集器的突破。ART提供了能量收集器的功能，可以结合自然振动来调整其固有频率，而无需人工干预或额外的调谐能量。ART能量收集器利用可移动质量块在双重夹持的振荡梁结构中的运动来调制梁的固有频率。通过在广泛的振动条件下调用射束动力学来进行详细研究，以提供对ART收割机操作机理的基本了解。结果表明，与固定共振能量采集器相比，ART采集器的带宽（36 Hz）大了1400％。通过评估安装在旋转泵上的收割机的性能，可以证明ART机构的实际可行性。结果表明，ART机制可以为机械式能量收集器的部署提供急需的突破。结果表明，与固定共振能量采集器相比，ART采集器的带宽（36 Hz）大了1400％。通过评估安装在旋转泵上的收割机的性能，可以证明ART机构的实际可行性。结果表明，ART机制可以为机械式能量收集器的部署提供急需的突破。结果表明，与固定共振能量采集器相比，ART采集器的带宽（36 Hz）大了1400％。通过评估安装在旋转泵上的收割机的性能，可以证明ART机构的实际可行性。结果表明，ART机制可以为机械式能量收集器的部署提供急需的突破。