[13a-N405-1~5] 16.2 Energy Harvesting

▼ [13a-N405-1] Enhancement of piezoelectric MEMS vibration energy harvester for impulsive force using 2-degree-of-freedom system

〇(M2)Aphayvong Sengsavang¹, Takeshi Yoshimura¹, Kensuke Kanda², Shuichi Murakami³, Norifumi Fujimura¹ (1.Osaka Pref. Univ, 2.Uni. of Hyogo, 3.ORIST)

Keywords:piezoelectric vibration energy harvesting, impulsive force, two-degree-of-freedom system

Vibration energy harvesting is attracting much attention to support the demand for self-powered devices. For practical applications of the harvesters, it is important to effectively harvest energy from environmental vibration, which has low frequency and irregularity. Piezoelectric MEMS vibration energy harvester (MEMS-PVEH) is one of the promising solutions because of the simple device structure and high output power density. In this work, the electromechanical properties of PVEHs with two-degree-of-freedom (2DOF) system, which has been reported to increase output power as the two resonance frequency of the vibration system getting close together, were investigated under impulsive force by theoretical calculation and experiment.