Improving the performance of an energy harvesting device using nonlinearity
Improving the performance of an energy harvesting device using nonlinearity
In this paper the benefits of using a nonlinear stiffness in an energy harvesting device comprising a massspring-
damper system is investigated. Analysis based on the principle of conservation of energy reveals
a fundamental limit of the effectiveness of any nonlinear device over a tuned linear device. The nonlinear
system considered has a hardening spring which has the effect of shifting the resonance frequency as the
amplitude of vibration increases. Numerical and analytical studies show that the device with a hardening
spring has a larger bandwidth over which the power can be harvested. The bandwidth is dependent on the
damping ratio, the nonlinearity and the amplitude of the input acceleration. The study also reveals that the
maximum velocity response is not dependent upon the nonlinearity but is dependent on the amplitude of
excitation and the damping ratio. Thus the device with a hardening spring harvests a similar amount of
maximum power (in the ideal case) irrespective of the degree of nonlinearity.
160-168
Ramlan, R.
476639c4-3fd5-4892-b4c8-c260be2fc768
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Mace, B.R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
September 2008
Ramlan, R.
476639c4-3fd5-4892-b4c8-c260be2fc768
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Mace, B.R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Ramlan, R., Brennan, M.J. and Mace, B.R.
(2008)
Improving the performance of an energy harvesting device using nonlinearity.
International Conference on Noise & Vibration Engineering (ISMA), Leuven, Belgium.
14 - 16 Sep 2008.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this paper the benefits of using a nonlinear stiffness in an energy harvesting device comprising a massspring-
damper system is investigated. Analysis based on the principle of conservation of energy reveals
a fundamental limit of the effectiveness of any nonlinear device over a tuned linear device. The nonlinear
system considered has a hardening spring which has the effect of shifting the resonance frequency as the
amplitude of vibration increases. Numerical and analytical studies show that the device with a hardening
spring has a larger bandwidth over which the power can be harvested. The bandwidth is dependent on the
damping ratio, the nonlinearity and the amplitude of the input acceleration. The study also reveals that the
maximum velocity response is not dependent upon the nonlinearity but is dependent on the amplitude of
excitation and the damping ratio. Thus the device with a hardening spring harvests a similar amount of
maximum power (in the ideal case) irrespective of the degree of nonlinearity.
This record has no associated files available for download.
More information
Published date: September 2008
Venue - Dates:
International Conference on Noise & Vibration Engineering (ISMA), Leuven, Belgium, 2008-09-14 - 2008-09-16
Identifiers
Local EPrints ID: 65256
URI: http://eprints.soton.ac.uk/id/eprint/65256
PURE UUID: 618b1cd6-dc83-411b-8f8f-c97846d48ea1
Catalogue record
Date deposited: 05 Mar 2009
Last modified: 09 Jan 2022 03:06
Export record
Contributors
Author:
R. Ramlan
Author:
M.J. Brennan
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
