Innovative Energy Harvester Design Using Bistable Mechanism With Compensational Springs In Gravity Field

Bogdan Vysotskyi (1) , Fabien Parrain (1) , Denis Aubry (2) , Philippe Gaucher (3) , Elie Lefeuvre (4)

1 C2N - Centre de Nanosciences et de Nanotechnologies [Orsay]
2 MSSMat - Laboratoire de mécanique des sols, structures et matériaux
3 CentraleSupélec
4 IEF - Institut d'électronique fondamentale

A monolithic tunable symmetric bistable mechanism Hussein Hussein et al-Design and numerical performance analysis of a microgravity accelerometer with quasi-zero stiffness Yuxing Duan et al-Frequency characteristics and thermal compensation of MEMS devices based on geometric anti-spring Hongcai Zhang et al-This content was downloaded from IP address 138.195.210.12 on 13/07 Abstract. The purpose of the presented work is to introduce the novel design of electrostatic energy harvester using bistable mechanism with compensational springs in gravity field capable of providing the output of several µW under the excitation of extremely small amplitude (up to 0.2g) and low frequency (10-100Hz). Presented energy harvester uses the bistable hysteresis modification to achieve low-frequency low-amplitude sensibility. It was demonstrated with finite element modelling (FEM) that hysteresis width produced by bistability is changing with a constant linear coefficient as a function of a compensational spring stiffness and thus a device sensitivity could be adjusted to the minimum point for the amplitude of external excitation. Further, highly non-linear bistable double curved beam mechanism assures the high sensitivity in frequencial domain due to the non-defined bandwidth. The equivalent circuit technique is used for simulating the device performance.

Domaines: Sciences de l'ingénieur [physics]

Bogdan Vysotskyi, Fabien Parrain, Denis Aubry, Philippe Gaucher, Elie Lefeuvre. Innovative Energy Harvester Design Using Bistable Mechanism With Compensational Springs In Gravity Field. Journal of Physics: Conference Series, 2016, 773 (012064), ⟨10.1088/1742-6596/773/1/012064⟩. ⟨hal-01832550⟩