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De-embedding Unmatched Connectors for Electric Cable Fault Diagnosis

Qinghua Zhang 1 Nassif Berrabah 1 Maud Franchet 2 Denis Vautrin 2
1 I4S - Statistical Inference for Structural Health Monitoring
Inria Rennes – Bretagne Atlantique , IFSTTAR/COSYS - Département Composants et Systèmes
Abstract : In order to make accurate reflectometry measurements on electric cables for fault diagnosis, connector de-embedding is a procedure for compensating measurement distortions caused by unmatched connectors. The key step in such a procedure is the characterization of the connectors, which is realized through measurements on a pair of connectors linked by a short cable segment. The analysis for deducing the characteristics of a single connector from measurements made on an assembled pair is known as the bisection problem. In this paper, after recalling the underdetermined nature of the bisection problem, a practically effective de-embedding procedure is proposed based on a particular regularization technique. Numerical examples are presented to illustrate the effectiveness of this procedure.
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Qinghua Zhang, Nassif Berrabah, Maud Franchet, Denis Vautrin. De-embedding Unmatched Connectors for Electric Cable Fault Diagnosis. SAFEPROCESS 2018 - 10th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, Aug 2018, Warsaw, Poland. pp.1439-1444, ⟨10.1016/j.ifacol.2018.09.535⟩. ⟨hal-01909588⟩

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