| Energy harvesting with the piezoelectric cantilever was studied under vibration environment. A theoretical models of piezoelectric cantilever was developed to determine the magnitude of power. The results predicted by the theoretical model were validated by the experimental data. Compared with the rectangular layer piezoelectric cantilever, the trapezoidal piezoelectric cantilever generated higher power with the same force and the volume of PZT. A maximal output power of about 24.2mW can be obtained from the trapezoidal piezoelectric cantilever at the operating frequency of 130Hz across a resistive load of 80k¦¸ with a cyclic stress of 1N. |