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Energy harvesting using semi-active nonlinear control

Energy harvesting using semi-active nonlinear control
Energy harvesting using semi-active nonlinear control
This paper presents the application of semi-active control for power harvesting using an electromechanical energy harvester. Two semi-active control strategies are proposed in the form of a time-periodic damper and a nonlinear cubic damper. For the periodic time-varying damper the average harvested power and the throw are obtained based on the Fourier series. The semi-active periodic time-varying damper is optimised to maximise the harvested power. The performance of the optimum semi-active periodic damper is compared with the optimum passive and semi-active on-off model at a particular frequency. It is demonstrated that the periodic time-varying damper can significantly increase the harvested power at all frequencies of interest. For the nonlinear damper, the harvested power and the throw are derived using the concept of the describing function. The results are compared with the linear damper. It is demonstrated that the nonlinear damper can significantly increase the absorbed power despite having much lower displacement compared to the linear damper. This makes the semi-active nonlinear damper very attractive for mechanical energy harvesters.
energy harvesting, semi-active, nonlinear control
Ghandchi Tehrani, Maryam
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Di Monaco, F.
9236ca7b-1b7b-4733-a4bc-a6fbc693b264
Bonisoli, E.
49a23ffd-138b-4b34-ab92-6b20eb3b0ed3
Ghandchi Tehrani, Maryam
c2251e5b-a029-46e2-b585-422120a7bc44
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Di Monaco, F.
9236ca7b-1b7b-4733-a4bc-a6fbc693b264
Bonisoli, E.
49a23ffd-138b-4b34-ab92-6b20eb3b0ed3

Ghandchi Tehrani, Maryam, Elliott, S.J., Di Monaco, F. and Bonisoli, E. (2013) Energy harvesting using semi-active nonlinear control. RASD2013. 30 Jun - 02 Jul 2013. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents the application of semi-active control for power harvesting using an electromechanical energy harvester. Two semi-active control strategies are proposed in the form of a time-periodic damper and a nonlinear cubic damper. For the periodic time-varying damper the average harvested power and the throw are obtained based on the Fourier series. The semi-active periodic time-varying damper is optimised to maximise the harvested power. The performance of the optimum semi-active periodic damper is compared with the optimum passive and semi-active on-off model at a particular frequency. It is demonstrated that the periodic time-varying damper can significantly increase the harvested power at all frequencies of interest. For the nonlinear damper, the harvested power and the throw are derived using the concept of the describing function. The results are compared with the linear damper. It is demonstrated that the nonlinear damper can significantly increase the absorbed power despite having much lower displacement compared to the linear damper. This makes the semi-active nonlinear damper very attractive for mechanical energy harvesters.

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More information

Published date: 1 July 2013
Venue - Dates: RASD2013, 2013-06-30 - 2013-07-02
Keywords: energy harvesting, semi-active, nonlinear control
Organisations: Inst. Sound & Vibration Research

Identifiers

Local EPrints ID: 354730
URI: http://eprints.soton.ac.uk/id/eprint/354730
PURE UUID: d031ca74-3dc7-48d1-a701-646018fea37c

Catalogue record

Date deposited: 31 Jul 2013 08:27
Last modified: 11 Dec 2021 02:33

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Contributors

Author: S.J. Elliott
Author: F. Di Monaco
Author: E. Bonisoli

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