Numerical investigations of bistable piezoelectric cantilever for enhanced energy harvesting

Document Type : Original Article

Authors

1 Production Engineering and Printing Technology Department, Akhbar El Yom Academy, Egypt.

2 Automotive Engineering Department, Higher Technology Institute, 10th of Ramadan 6th of October, Egypt.

3 Department of Mechatronics, Canadian International College, Cairo, Egypt.

10.1088/1757-899X/973/1/012022

Abstract

Piezoelectric energy harvesting applications have been highly impacted research area recently. Numerical investigations for bistable piezoelectric cantilevers have great importance to understand its dynamic performance. This paper aims to develop comprehensive numerical models to simulate the dynamic response of aunimorph piezoelectric bender under
bistability effect for enhanced energy harvesting. To this end, the equivalent stiffness, damping, electromagnetic coupling and capacitance coefficients of a bistable piezoelectric cantilever have been numerically developed. Besides, finite element models are developed to determine the bistability repulsion force between magnets. The resulting simulations are then implemented in an electromechanical model to predict the output voltage and power over a range of load resistance.

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