Abstract
Conversion of vibration energy of a structure, whether being a machine or vehicle into electric energy can improve reliability of the structure and energy utilization efficiency, and can potentially reduce the amplitude of vibration of the structure and associated damaging effects of the vibration. An analytical approach is proposed that combines the frequency response analysis and time domain integration simulation methods. The main advantage of this approach is its capability to predict harvested resonant power and energy harvesting efficiency of mechanical systems with built-in piezoelectric material. The variables that are used in the analysis include a resonant frequency, mechanical damping, external load resistance, and piezoelectric material properties regardless of the system size. The approach allows for the prediction of the output voltage and harvested resonant power from measured field vibration acceleration data as input excitation.
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