title: Design and fabrication of a PZT cantilever for low frequency vibration energy harvesting.
abstract: In this study, a PZT cantilever with a Si proof mass is designed and fabricated for a low frequency energy harvesting application. A mathematical model of a multi-layer composite beam was derived and applied in a parametric analysis of the piezoelectric cantilever. Finally, the dimensions of the cantilever were determined for the resonant frequency of the cantilever. Our cantilever design was based on MATLAB and ANSYS simulations. For this simulation, the proof mass volumes were varied from 0 to 0.5 mm3 and resonant frequencies were calculated from 833.5 Hz to 125.5 Hz, respectively. Based on simulation, we fabricated a device with beam dimensions of about 4.10 mm x 0.48 mm x 0.012 mm, and an integrated Si proof mass with dimensions of about 0.481 mm x 0.48 mm x 0.45 mm. The resonant frequency, maximum peak voltage, and highest average power of the cantilever device were 224.8 Hz, 4.8 mV, and 2.24 nW, respectively.
authors: Department of Control and Instrumentation Engineering, Korea University, Jochiwon, Chungnam, 339-700, Korea.
authors: Moonkeun
authors: M
authors: Kim
authors: Beomseok
authors: B
authors: Hwang
authors: Nam Ki
authors: NK
authors: Min
authors: Jaehwa
authors: J
authors: Jeong
authors: Kwang-Ho
authors: KH
authors: Kwon
authors: Kang-Bak
authors: KB
authors: Park