This paper presents the experimental activity finalized to the reflectometry diagnostics of commercial and aeronautical cables. The obtained results demonstrate that the frequency-domain reflectometry allows the detection and localization of open-ended and short-circuited conditions, defects in the metallic shield or in the dielectric insulation of single-core and multi-core cables, shielded or unshielded. It is shown that the diagnostics of faults in single-core unshielded cables, which are widely used onboard aircraft, is critical due to the strong influence of the cable installation and configuration of the current return path. It results that the choice of the frequency span and central frequency adopted in the frequency-domain reflectometry tests is crucial due to the high-frequency attenuation provided by aeronautical cables, which are generally designed to carry on signals up to ten or hundred kilohertz. An additional critical aspect, which needs further investigations, concerns the characterization and modelling of aeronautical connectors.
Experimental diagnostics of aeronautical cables using frequency domain reflectometry
2004
6 Seiten, 9 Bilder, 2 Tabellen, 7 Quellen
Aufsatz (Konferenz)
Englisch
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