Vibration-based piezoelectric energy harvesters through the conversion of vibration energy to electrical energy has
gained increasing attention over the past decade because of the reduced power requirements of small electronic
components, especially in industrial condition monitoring applications where sensors may be embedded in machines.
The structure parameters of cantilevered piezoelectric energy harvesters are of importance to maximize the output power
in accordance with the characteristics of the ambient vibrations. Therefore, a piezoelectric cantilevers optimization
method using finite element analysis and SPICE is proposed. This paper models piezoelectric cantilever using Hamilton
principle and extracts the vibration modal parameters to establish the circuit model in SPICE. The numerical analysis is
addressed to study the effect of parameters. Finally, the optimization analysis and experiment are carried out. The results
verify that the optimized cantilevered piezoelectric energy harvesters can produce a 56V peak open-circuit voltage, and
that the proposed method is suitable for optimization design of piezoelectric energy harvester.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Junyi Cao ; Shengxi Zhou ; Xiaolong Ren and Binggang Cao
"Piezoelectric cantilevers optimization for vibration energy harvesting", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84090D (April 2, 2012); doi:10.1117/12.923160; http://dx.doi.org/10.1117/12.923160