A tunable kinetic energy harvester with dynamic over range protection
Ayala Garcia, Ivo, Zhu, Dibin, Tudor, John and Beeby, Steve (2010) A tunable kinetic energy harvester with dynamic over range protection. Smart Materials and Structures, 19, (11), 1-10. (doi:10.1088/0964-1726/19/11/115005).
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This paper describes the development and implementation of a self-powered control system that autonomously adapts the resonant frequency of an electromagnetic vibration-based energy harvester to ambient vibration frequency. The tuning mechanism adjusts the harvester’s spring stiffness by varying the axial tensile force between two permanent magnets. The system adjusts the resonant frequency of the harvester from 64 to 78 Hz, increasing the operational bandwidth of the harvester from 0.26 to 14 Hz, using a single structure. The same tuning principle is also applied to protect the harvester from over range acceleration which could cause physical damage to its structure. The closed loop control uses the phase difference between the harvester output signal and ambient vibration, measured by an accelerometer attached to the vibration source, to adjust the tuning mechanism.
|Subjects:||Q Science > QA Mathematics > QA75 Electronic computers. Computer science|
|Divisions:||Faculty of Physical and Applied Science > Electronics and Computer Science > EEE
|Date Deposited:||22 Sep 2010 08:21|
|Last Modified:||13 Mar 2013 14:31|
|Contributors:||Ayala Garcia, Ivo (Author)
Zhu, Dibin (Author)
Tudor, John (Author)
Beeby, Steve (Author)
|Further Information:||Google Scholar|
|ISI Citation Count:||1|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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