A multi-cell piezoelectric device for tunable resonance actuation and energy harvesting
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Asada_A multi-cell.pdf
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1.1 MB
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Author(s)
Secord, Thomas W.
Mazumdar, Anirban
Asada, Harry
Date Issued
July 2010
Journal
Proceedings of the 2010 IEEE International Conference on Robotics and Automation
Publisher
Institute of Electrical and Electronics Engineers
Citation
Secord, Thomas W, Anirban Mazumdar, and H. Harry Asada. “A Multi-cell Piezoelectric Device for Tunable Resonance Actuation and Energy Harvesting.” 2010 IEEE International Conference on Robotics and Automation (ICRA), Anchorage Convention District, May 3-8, 2010, Anchorage, Alaska, USA, 2010. 2169–2176. Web. © 2010 IEEE.
Version
Final published version
Abstract
Variable stiffness actuation and energy harvesting have been important yet separate challenges in robotics. Both functions are needed, however, for mobile robots on extended missions when actuators and generators must be used together. In this paper, we present a unique piezoelectric cellular system that combines motion generation and energy harvesting capabilities into a single, scalable device. Each of the discrete cellular units provides linear, contractile motion at 10% strain using the converse piezoelectric effect. These units may also be back-driven from environmental loading and thereby generate energy using the direct piezoelectric effect. Furthermore, each cell has the capability to toggle between a low stiffness ON state and a high stiffness OFF state, which allows an assembly of individual cells to tune both their static stiffness and structural resonant frequencies online. We demonstrate the effectiveness of our device for tuning both locomotion speed and the harvested power of an underwater flapping fin system.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1109/ROBOT.2010.5509158
