The Vibration-Power Generation Study of Piezoelectric Ceramic Composite

A piezoelectric ceramic composite material of cantilever beam structure has been prepared based on the simulation design and calculation results and its vibration generating perfornance studied.By matching the external and the internal impedance of the composite,the maximum output power is obtained.Under the optimum impedance matching condition,the research on the relationship between the vibration power generating performance and the excitation amplitude and frequency are carried out.The results show that the electric power generated from vibration of piezoelectric ceramic composite has a two-order increase with the increase of amplitude,and a linear increase with the increase of the excitation frequency.