Adaptive vibration energy harvesting

Behrens, Sam, Ward, John, and Davidson, Josh (2007) Adaptive vibration energy harvesting. In: Proceedings of SPIE: Active and Passive Smart Structures and Integrated Systems 2007 (6525) pp. 59-71. From: SPIE 14th International Symposium Conference: Active and Passive Smart Structures and Integrated Systems 2007, 18-22 MAR 2007, San Diego, CA, USA.

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By scavenging energy from their local environment, portable electronic devices such as mobile phones, radios and wireless sensors can achieve greater run-times with potentially lower weight. Vibration energy harvesting is one such approach where energy from parasitic vibrations can be converted into electrical energy, through the use of piezoelectric and electromagnetic transducers. Parasitic vibrations come from a range of sources such as wind, seismic forces and traffic. Existing approaches to vibration energy harvesting typically utilise a rectifier circuit, which is tuned to the resonant frequency of the harvesting structure and the dominant frequency of vibration. \lve have developed a novel approach to vibration energy harvesting, including adapt ion to non-periodic vibrations so as to extract the maximum amount of vibration energy available. Experimental results of an experimental apparatus using off-the-shelf transducer (i.e. speaker coil) show mechanical vibration to electrical energy conversion efficiencies of 27 - 34%. However, simulations of a more electro-mechanical efficient and lightly damped transducer show conversion efficiencies in excess of 80%.

Item ID: 3172
Item Type: Conference Item (Research - E1)
Keywords: vibration; energy harvesting; energy scavenging; adaptive control; machine learning
Date Deposited: 15 Oct 2009 03:04
FoR Codes: 02 PHYSICAL SCIENCES > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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