9 April 2010 Vibro-impacting power harvester
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Abstract
The certification of retro-fitted structural health monitoring (SHM) systems for use on aircraft raises a number of challenges. One critical issue is determining the optimal means of supplying power to these systems, given that access to the existing aircraft power-system is often problematic. Previously, the DSTO has shown that a structural-strain based energy harvesting approach can be used to power a device for SHM of aircraft structure. Acceleration-based power harvesting from airframes can be more demanding than a strain based approach because the vibration spectrum of an aircraft structure can vary dynamically with flight conditions. A vibration spectrum with varying frequency may severely limit the power harvested by a single-degree-of-freedom resonance-based device, and hence a frequency agile or (relatively) broadband device is often required to maximize the energy harvested. This paper reports on an investigation into the use of a vibro-impact approach to construct an acceleration-based power harvester that can operate in the frequency range 29-41 Hz.
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Scott Moss, Ian Powlesland, Stephen Galea, Gregory Carman, "Vibro-impacting power harvester", Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 76431A (9 April 2010); doi: 10.1117/12.848897; https://doi.org/10.1117/12.848897
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