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Proceedings Paper

Tunable bistable devices for harvesting energy from spinning wheels
Author(s): Mohamed Elhadidi; Mohammed Helal; Omar Nassar; Mustafa Arafa; Yasser Zeyada
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Paper Abstract

Bistable systems have recently been employed for vibration energy harvesting owing to their favorable dynamic characteristics and desirable response for wideband excitation. In this paper, we investigate the use of bistable harvesters to extract energy from spinning wheels. The proposed harvester consists of a piezoelectric cantilever beam that is mounted on a rigid spinning hub and carries a tip mass in the form of a permanent magnet. Magnetic repulsion forces from an opposite magnet cause the beam to possess two stable equilibrium positions. Inter-well lead-lag oscillations caused by rotation in a vertical plane provide a good source for energy extraction. The design offers frequency tuning, as the centrifugal forces strain the harvester, thereby increasing its natural frequency to cope with a variable rotational speed. This has applications in self-powered sensors mounted on spinning wheels, such as tire pressure monitoring sensors. An effort is made to select the design parameters to enable the harvester to exhibit favorable inter-well oscillations across a range of rotational speeds for enhanced energy harvesting. Findings of the present work are verified both numerically and experimentally.

Paper Details

Date Published: 2 April 2015
PDF: 13 pages
Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 94310S (2 April 2015); doi: 10.1117/12.2083669
Show Author Affiliations
Mohamed Elhadidi, Higher Technological Institute (Egypt)
Mohammed Helal, Canadian International College (Egypt)
Omar Nassar, Ain Shams Univ. (Egypt)
Mustafa Arafa, The American Univ. in Cairo (Egypt)
Yasser Zeyada, Cairo Univ. (Egypt)

Published in SPIE Proceedings Vol. 9431:
Active and Passive Smart Structures and Integrated Systems 2015
Wei-Hsin Liao, Editor(s)

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