Piezoelectric Energy Harvesting and Dissipation on Structural Damping

Abstract

This article aims to provide a comparative study on the functions of piezoelectric energy harvesting, dissipation, and their effects on the structural damping of vibrating structures. Energy flow in piezoelectric devices is discussed. Detailed modeling of piezoelectric materials and devices are provided to serve as a common base for both analyses of energy harvesting and dissipation. Based on these foundations, two applications of standard energy harvesting (SEH) and resistive shunt damping (RSD) are investigated and compared. Furthermore, in the application of synchronized switch harvesting on inductor (SSHI), it is shown that the two functions of energy harvesting and dissipation are coexistent. Both of them bring out structural damping. Further analyses and optimization for the SSHI technique are performed.

Self-Powered Electronics for Piezoelectric Energy Harvesting Devices

“…Accordingly, the SSHI circuit increases the magnitude of the piezoelectric voltage and puts piezoelectric voltage vp in phase with the vibration velocity, which indicates that more energy is extracted from the vibration source. The results also show that the energy stored in the clamped capacitor Cp is extracted by the LC resonance circuit and thus the piezoelectric voltage can be increased [22,23]. The SSHI technique is equivalent to enlarge the coupling factor in the weakly coupled structure [21].…”

An improved self-powered switching interface for piezoelectric energy harvesting

“…This definition on voltage inversion factor [9] includes the sign information, therefore is more general, compared to that given in [8].…”

“…During a certain interval in every cycle, energy returns from electrical part to mechanical part. It was called energy return phenomenon [9].…”

Piezoelectric energy harvesting circuit using full-wave voltage doubler rectifier and switched inductor

“…However, the PEH circuit using only one rectifier as an interface circuit cannot efficiently obtain the electrical energy because the electrical energy returns to the vibration energy in each cycle by "energy return phenomenon" [4]. To avoid giving rise to this phenomenon, SSHI (Synchronized Switch Harvesting on Inductor) circuit has been proposed [5] - [7].…”