Optimal Design of a Novel Piezoelectric Vibration Energy Harvester

A novel piezoelectric vibration energy harvester structure is designed. The output voltage is employed as the objective function, and the structural parameters of the vibration energy harvester device are optimized by Taguchi method. The best parameter combination of A3(95mm), B3(45mm), C1(60mm), D2(35mm) and E1(50mm) is determined. Through the analysis of variance, it is concluded that parameter A has the most obvious effect on the response of the piezoelectric energy harvester, with the contribution rate reaching 26.02%, and the influences of B, C, D and E decrease successively. The finite element model of the piezoelectric vibration energy harvester is established, then the load impedance matching characteristics and acceleration dependence of voltage are discussed.