The Piezoelectric energy harvester system has fascinated rigorous consideration in the area of self powered wireless sensor networks. A piezoelectric energy harvesting system constitutes three components namely, piezoelectric device, interfacing circuits and storage. This paper represents the study of geometrical and material variation on the resonant frequency and output power of bimorph piezoelectric energy harvester. It has been observed that large length of beam or small thickness of beam resulting in reduced resonant frequency. Further, it can also be reduced by increasing the length or height of proof mass or by using the high mass density material for proof mass Similarly, the output power of bimorph piezoelectric energy harvester can be increased by decreasing the length or increasing the width or thickness of the beam. Furthermore, the use of low mass density material for proof mass and low damping ratio are another solutions of increasing the output power of bimorph piezoelectric energy harvester.

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