Advanced Forward Methods for Complex Wire Fault Modeling

Eric J. Lundquist

doi:10.1109/JSEN.2012.2227996

2013-04-01

PRE

DOI：10.1109/JSEN.2012.2227996

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摘要

En 中文

This paper presents a novel implementation of forward modeling methods for simulating the reflectometry responses of faults in the shields of coaxial cable or other shielded lines. First, a cross-sectional modeling was used to determine the characteristic impedance of various wire sections. These values were then incorporated into longitudinal models to simulate the overall reflectometry response. The finite-difference method is a cross-sectional modeling method that was used to simulate cross-sectional characteristic impedance. Results obtained using this method are accurate within 1% of analytical solutions, and can be simulated very quickly using in-house codes. The finite-integral technique (FIT) is also used to model chafes on wires with TEM and higher order modes. Because FIT is computationally slow, a curve-fitting technique is used to predict the chafe profile within 0.01% of the simulated values. Modified transmission matrix and S-parameter methods are used to provide responses with accuracies within 0.3% of the measured profiles.

Keyword:

Aerospace wiring

chafes

finite-difference method (FDM)

finite-integral technique (FIT)

modeling

modified transmission matrix (MTM)

reflectometry

simulation

soft faults

wire faults