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18 April 2008 Vibration energy harvesters with non-linear compliance
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Vibration powered electrical generators typically feature a mass/spring resonant system to amplify small background vibrations. The compliance element in these resonant systems can become non-linear as a result of manufacturing limitations, physical operating constraints, or by deliberate design. The characteristics of mass/spring resonant systems with non-linear compliance elements are well known but they have not been widely applied within the field of energy harvesting. In this paper analysis of non-linear system behaviour using the harmonic balance method is presented, giving an insight into the potential benefits of non-linearities in energy harvesting applications. The design of a vibration powered energy harvester is reviewed and it is shown how the deliberate incorporation of non-linear behaviour within a design can be beneficial in improving magnetic loading and also in extending the range of frequencies over which the device can generate useful power.
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S. G. Burrow, L. R. Clare, A. Carrella, and D. Barton "Vibration energy harvesters with non-linear compliance", Proc. SPIE 6928, Active and Passive Smart Structures and Integrated Systems 2008, 692807 (18 April 2008);

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