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76 / 2023-09-05 22:23:56
Design and analysis of a low-frequency vibration energy harvester with a piezoelectric stack and a negative stiffness structure
vibration energy harvester, piezoelectric stack, low-frequency vibration, negative stiffness structure
Special Sessions > SS12 - Intelligent Energy Sensing and Conversion technologies and Devices
Final Paper
Donglin Zou / Shanghai Jiaotong University
Zhushi Rao / Shanghai Jiao Tong University
Most vibrations in engineering are of low frequencies, so this study proposes a novel piezoelectric vibration energy harvester for low-frequency vibrations. The model consists of a piezoelectric stack, a vertical spring, and a negative stiffness structure (NSS). The NSS is introduced to reduce the resonance frequency of the piezoelectric stack, which consists of two horizontal springs and two connecting rods. The analytical expressions of optimal resistance load, optimal harvesting frequency, and harvesting power are derived. The results show that the NSS can dramatically decrease the optimal harvesting frequency and also greatly increase the energy harvesting efficiency near the optimal harvesting frequency. For the case considered in this study, the optimal harvesting frequency can be reduced from 70 Hz to 10.5 Hz and the maximum harvesting power is increased from 15.3 μW to 111.8 μW.
Important Date

  • Conference Date

    Nov 02

    2023

    to

    Nov 04

    2023

  • Dec 15 2023

    Draft paper submission deadline

  • Dec 20 2023

    Registration deadline

Sponsored By
IEEE Instrumentation and Measurement Society
Xidian University
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