Directly and parametrically excited bi-stable vibration energy harvester for broadband operation

Abstract

Despite many recent advances, the wide-spread adoption of vibrational energy harvesting has been limited by the low levels of generated output power and confined operational frequency band. Recent work by the authors on parametrically excited harvesters has demonstrated over an order of magnitude power improvement. This paper presents an investigation into the simultaneous employment of both direct and parametric resonance, as well as the incorporation of bi-stability, in an attempt to further improve the mechanical-to-electrical energy conversion efficiency by broadening the output power spectrum. Multiple direct and parametric resonant peaks from a multi-degree-of-freedom system were observed and an accumulative ~10 Hz half-power bandwidth was recorded for the first 40 Hz. Real vibration data was also employed to analysis the RMS power response effectiveness of the proposed system.

Publication DOI: https://doi.org/10.1109/Transducers.2013.6626801
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences
Additional Information: © Copyright 2013 IEEE.
Event Title: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems
Event Type: Other
Event Dates: 2013-06-16 - 2013-06-20
ISBN: 978-1-4673-5983-2
PURE Output Type: Conference contribution
Published Date: 2013-06-16
Authors: Jia, Yu (ORCID Profile 0000-0001-9640-1666)
Seshia, Ashwin A

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