Kuponu, O.S, Kadirkamanathan, V., Bhattacharya, B. et al. (1 more author) (2016) Using feedback control to actively regulate the healing rate of a self-healing process subjected to low cycle dynamic stress. Smart Materials and Structures, 25 (5). 55028. ISSN 0964-1726
Abstract
Intrinsic and extrinsic self-healing approaches through which materials can be healed generally suffer from several problems. One key problem is that to ensure effective healing and to minimise the propagation of a fault, the healing rate needs to be matched to the damage rate. This requirement is usually not met with passive approaches. An alternative to passive healing is active self-healing, whereby the healing mechanism and in particular the healing rate, is controlled in the face of uncertainty and varying conditions. Active self-healing takes advantage of sensing and added external energy to achieve a desired healing rate. To demonstrate active self-healing, an electrochemical material based on the principles of piezoelectricity and electrolysis is modelled and adaptive feedback control is implemented. The adaptive feedback control compensates for the insufficient piezo-induced voltage and guarantees a response that meets the desired healing rate. Importantly, fault propagation can be eliminated or minimised by attaining a match between the healing and damage rate quicker than can be achieved with the equivalent passive system. The desired healing rate is a function of the fault propagation and is assumed known in this paper, but can be estimated in practice through established prognostic techniques.
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Copyright, Publisher and Additional Information: | © 2016 IOP Publishing. This is an author produced version of a paper subsequently published in Smart Materials and Structures. Uploaded in accordance with the publisher's self-archiving policy. | ||||
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Institution: | The University of Sheffield | ||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Automatic Control and Systems Engineering (Sheffield) | ||||
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Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 08 Apr 2016 11:51 | ||||
Last Modified: | 03 Nov 2017 09:20 | ||||
Published Version: | https://dx.doi.org/10.1088/0964-1726/25/5/055028 | ||||
Status: | Published | ||||
Publisher: | Institute of Physics | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1088/0964-1726/25/5/055028 | ||||
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