[8p-Z17-1~12] 6.1 強誘電体薄膜

▲ [8p-Z17-12] Electromechanical properties of 2-degree-of-freedom piezoelectric vibration energy harvester for impulsive force

〇(M1)Aphayvong Sengsavang¹、Takeshi Yoshimura¹、Kensuke Kanda²、Shuichi Murakami³、Norifumi Fujimura¹ (1.Osaka Pref. Univ.、2.Univ. of Hyogo、3.ORIST)

キーワード：piezoelectric vibration energy harvesting, two-degree-of-freedom system, impulsive force

In order to expand the application of piezoelectric vibration energy harvester (pVEH), it is important to effectively harvest vibration energy in ambient vibrations, which has random, time-varying and low-frequency properties. Instead of broadening the bandwidth of the harvester, which the decreasing of mechanical Q factor leads to lower output power, we focus on harvesting energy from the impulsive force. In our previous work, electromechanical properties of conventional pVEHs with one-degree-of-freedom system (1DOF) were characterized under impulsive force. Moreover, the significant improvement of output energy from the impulsive force was observed experimentally by using dynamic magnifier under the pVEH, which is known as a 2DOF system. In this work, the electromechanical response of 2DOF-pVEHs under the impulsive force is discussed by theoretical calculation.