Bistable vibration energy harvester and SECE circuit: exploring their mutual influence

Abstract

The present work focuses on vibration energy harvesting to replace chemical batteries as power supplies in wireless autonomous sensors. More particularly, this article deals with nonlinear inertial oscillators and more precisely bistable harvesters, which offer a wide bandwidth compared to linear structures. These harvesters require AC-DC electronic interface to be able to supply wireless sensors or small intermediate storage elements (used to smooth the power demand). However, few studies have investigated the influence of AC-DC circuits on bistable harvesters. This work therefore focuses on developing the first analytical model able to predict the frequency response of a bistable harvester coupled to one of these interfaces: the SECE circuit (Synchronized Electric Charge Extraction). This mathematical model includes subharmonic behaviors, stability analyses to small disturbances and the analyses of the stability robustness of high orbits characterizing their capability to handle external disturbances in real conditions without falling on a low orbit. The model is then validated experimentally with a buckled beam bistable harvester with piezoelectric conversion. The latter shows that the use of SECE circuit leads to multiply the mean extracted power from 1.3 to 2.2 compared to a direct connection to the load. The reachable frequency range is nevertheless divided by 1.5.

Large-bandwidth piezoelectric energy harvesting with frequency-tuning synchronized electric charge extraction

“…Studying the combined effect of existing active control schemes with a nonlinear piezoelectric converter is the subject of very recent research and is out of the scope of this paper. A recent analysis of classical SECE combined with a bistable resonator can be found in Huguet et al [23].…”

Finite element-based assessment of energy harvesting in composite beams with piezoelectric transducers

“…On the other hand, non-linear PE harvesters may be tuned to increase the frequency range, the power amplitude, and the responsiveness to non-sinusoidal noisy excitations. 14–16…”

A machine learning approach for maximizing direct current power of nonlinear energy harvesting systems subjected to periodic impulse excitation

“…Eq. (19) shows the confusion matrix for the multi-class classification problem. Element M ij indicates the number of examples in class i that are incorrectly identified as class j when i ∕ = j.…”

“…In addition, since direct current (DC) power is required to power IoT sensors, nonlinear circuits are investigated when coupled with nonlinear energy harvesters to examine strategies that optimize harvested DC power [9,36,21]. Huguet et al [19] explored the integration of bistable energy harvesters with synchronized electric charge extraction (SECE) circuits and found an increase in electric power and decrease in frequency bandwidth when subjected to harmonic excitation. Cai and Harne [3,4] proposed an analytical approach to determine optimal working conditions for buck-boost converters interfaced with nonlinear energy harvesters under pure harmonic excitation.…”