A tapered beam piezoelectric energy harvester shunted to P-SSHI interface

In this paper, a tapered beam piezoelectric energy harvester attached with a tip mass whose centroid does not coincide with the attaching point is investigated. First, the consideration of the geometric dimensions of the tip mass is embodied in the calculation of its rotational inertia and the determination of its centroid. Subsequently, a single-degree-of-freedom representation method is developed on the basis of a derived analytical governing equation. Finally, by shunting to the P-SSHI interface circuit, using an improved equivalent impedance modelling method, the mechanical and electrical domains are bridged to provide a comprehensive analysis of the practical energy harvesting system.