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Vibration power harvesting from head motion [E192]

Vibration power harvesting from head motion [E192]
Vibration power harvesting from head motion [E192]
A feasibility study has been undertaken to estimate the maximum power that could be harvested from the different axes of the linear and angular movements of a person’s head when walking. An inertial device, tuned to a particular frequency, was assumed in each case, and it was found that most power was generally available by harvesting from vertical head motion. The scaling law for linear motion predicts that the power available is proportional to vibration amplitude, the fourth power of the device’s characteristic length and the cube of the excitation frequency. The power available by tuning the device to the fundamental walking frequency was predicted to be about 60 ?W for a 1 cm3 device. Even though the amplitude of the measured head motion decreased at higher harmonics, the frequency cubed term in the scaling law made it more efficient to harvest power from a higher harmonic, about 100 ?W being available from the fifth harmonic, for example. Some preliminary work has also been performed in the design of a nonlinear device, which is able to harvest power from several harmonics simultaneously.
power harvesting, head motion, nonlinear oscillators
0854328823
12pp
University of Southampton
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Saba, R.
b286d579-6e09-4595-a9ed-d4a730d5943f
Baumann, O.N.
1226ddee-5542-4c44-bac0-7d4fc8686b61
Brennan, M.J.
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Saba, R.
b286d579-6e09-4595-a9ed-d4a730d5943f
Baumann, O.N.
1226ddee-5542-4c44-bac0-7d4fc8686b61
Brennan, M.J.

Elliott, S.J., Saba, R. and Baumann, O.N. (2008) Vibration power harvesting from head motion [E192]. Brennan, M.J. (ed.) In Proceedings of EURODYN 2008, 7th European Conference on Structural Dynamics, Southampton, UK, 7-9th July 2008. University of Southampton. 12pp .

Record type: Conference or Workshop Item (Paper)

Abstract

A feasibility study has been undertaken to estimate the maximum power that could be harvested from the different axes of the linear and angular movements of a person’s head when walking. An inertial device, tuned to a particular frequency, was assumed in each case, and it was found that most power was generally available by harvesting from vertical head motion. The scaling law for linear motion predicts that the power available is proportional to vibration amplitude, the fourth power of the device’s characteristic length and the cube of the excitation frequency. The power available by tuning the device to the fundamental walking frequency was predicted to be about 60 ?W for a 1 cm3 device. Even though the amplitude of the measured head motion decreased at higher harmonics, the frequency cubed term in the scaling law made it more efficient to harvest power from a higher harmonic, about 100 ?W being available from the fifth harmonic, for example. Some preliminary work has also been performed in the design of a nonlinear device, which is able to harvest power from several harmonics simultaneously.

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More information

Published date: July 2008
Additional Information: CD-ROM + book of abstracts
Keywords: power harvesting, head motion, nonlinear oscillators

Identifiers

Local EPrints ID: 160817
URI: http://eprints.soton.ac.uk/id/eprint/160817
ISBN: 0854328823
PURE UUID: 0cd05bb5-c25d-41a5-a77b-10c6640cd7cc

Catalogue record

Date deposited: 20 Jul 2010 10:23
Last modified: 10 Dec 2021 18:24

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Contributors

Author: S.J. Elliott
Author: R. Saba
Author: O.N. Baumann
Editor: M.J. Brennan

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