TY - JOUR
T1 - 2D electrostatic energy harvesting device using a single shallow arched microbeam
AU - Ben Hassena, Mohamed Amin
AU - Samaali, Hatem
AU - Ouakad, Hassen M.
AU - Najar, Fehmi
N1 - Funding Information:
The last two authors are grateful for the support of the Internal Research Grant provided by the Deanship of Research at Sultan Qaboos University (SQU) through grant number IG/ENG/MIED/20/01 .
Publisher Copyright:
© 2021 Elsevier Ltd
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - We propose to use a shallow arched microbeam to design a compact 2D energy harvesting device using a single electrostatic transducer. The proposed design can transform any in-plane applied acceleration into motion of a variable capacitor whose movable electrode is linked to the shallow arched microbeam. A secondary electrode is placed to directly apply a force on the microbeam in order to tune its natural frequency to increase the amount of harvested energy. We derive the governing equations of the coupled system using the Hamilton's principle. The associated nonlinear differential equations are solved using a Galerkin technique. The frequency response curves are obtained for accelerations in different directions under several applied voltages. The model and the design are validated using a finite element model. In a second modeling approach, the system is coupled to a conditioning circuit based on pump-charge technique. The coupled system is solved for different excitation frequencies. It was observed that the input voltage can be doubled after a 16s excitation, and that almost the triple of this value can be obtained for longer excitation times. The performance of the system is assessed by comparing its performances with other designs found in the literature.
AB - We propose to use a shallow arched microbeam to design a compact 2D energy harvesting device using a single electrostatic transducer. The proposed design can transform any in-plane applied acceleration into motion of a variable capacitor whose movable electrode is linked to the shallow arched microbeam. A secondary electrode is placed to directly apply a force on the microbeam in order to tune its natural frequency to increase the amount of harvested energy. We derive the governing equations of the coupled system using the Hamilton's principle. The associated nonlinear differential equations are solved using a Galerkin technique. The frequency response curves are obtained for accelerations in different directions under several applied voltages. The model and the design are validated using a finite element model. In a second modeling approach, the system is coupled to a conditioning circuit based on pump-charge technique. The coupled system is solved for different excitation frequencies. It was observed that the input voltage can be doubled after a 16s excitation, and that almost the triple of this value can be obtained for longer excitation times. The performance of the system is assessed by comparing its performances with other designs found in the literature.
KW - 2D electrostatic energy harvester
KW - MEMS
KW - Motion amplification
KW - Shallow arch microbeam
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UR - https://www.mendeley.com/catalogue/475d870e-cdce-3ec2-8c36-06b2e851451b/
U2 - 10.1016/j.ijnonlinmec.2021.103700
DO - 10.1016/j.ijnonlinmec.2021.103700
M3 - Article
AN - SCOPUS:85101809140
SN - 0020-7462
VL - 132
JO - International Journal of Non-Linear Mechanics
JF - International Journal of Non-Linear Mechanics
M1 - 103700
ER -