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An inverse problem of reconstructing the electrical and geometrical parameters characterising airframe structures and connector interfaces

Mackay, C. and Hayward, D. and Mulholland, A.J. and McKee, S. and Pethrick, R.A. (2007) An inverse problem of reconstructing the electrical and geometrical parameters characterising airframe structures and connector interfaces. Inverse Problems in Science and Engineering, 15 (3). pp. 177-190.

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Abstract

This article is concerned with the detection of environmental ageing in adhesively bonded structures used in the aircraft industry. Using a transmission line approach a forward model for the reflection coefficients is constructed and is shown to have an analytic solution in the case of constant permeability and permittivity. The inverse problem is analysed to determine necessary conditions for a unique recovery. The main thrust of this article then involves modelling the connector and then experimental rigs are built for the case of the air-filled line to enable the connector parameters to be identified and the inverse solver to be tested. Some results are also displayed for the dielectric-filled line.