EVALUATION OF SUBSTRATE MATERIALS AND MASS STRUCTURE ON PIEZOELECTRIC CANTILEVER BASED ENERGY HARVESTER

As the world progresses towards sustainable energy, piezoelectric energy harvesting system secures an escalating interest to shape up the idea of energy harvesting for application and devices that require small fraction of power. The current shortcoming of piezoelectricity is its narrow operating frequency bandwidth. This leads to it being only effective in limited circumstances. The purpose of this research is to identify the fundamental factors contributing to achieving a more stable and wide operating frequency bandwidth without applying any external medium to the system. COMSOL Multiphysics was applied to simulate the cantilever beam by changing the configuration of the system, such as size, shape, and the material of the tip mass, within a range of 0300 Hz. From the simulations results, Tungsten outperforms all the other materials in every tested configuration and aluminium produces the least magnitude of voltage and power. The rest of the materials show sufficient outputs, while some of the materials display stable value at their peak for a few consequent frequencies, including aluminium. The results would help explore conditions that may lead to the enhancement of the output for further use in various devices and applications.