Resonant frequency tuning of a novel piezoelectric vibration energy harvester (PVEH)

It is imperative to provide autonomous power supplies for the sensor nodes in structural health monitoring. Piezoelectric vibration energy harvesters (PVEH) can generate power to meet this. Here, studies on a novel PVEH design integrating ionic polymer metal composites (IPMC), for electrical tuning of resonant frequency of the harvester have been discussed. The device for which a patent is pending, has two sections. Macro fiber composite (MFC) is bonded on the root section and the extension beam is impacted by IPMC. Net power output was achieved with varying conditions. This article also discusses theoretical analysis of results and next-generation devices.