论文信息 - Fault Detection of Aircraft Cable via Spread Spectrum Time Domain Reflectometry

Fault Detection of Aircraft Cable via Spread Spectrum Time Domain Reflectometry

As the airplane cable fault detection based on TDR (time domain reflectometry) is affected easily by various noise signals, which makes the reflected signal attenuate and distort heavily, failing to locate the fault. In order to solve these problems, a method of spread spectrum time domain reflectometry (SSTDR) is introduced in this paper, taking the advantage of the sharp peak of correlation function. The test signal is generated from ML sequence (MLS) modulated by sine wave in the same frequency. Theoretically, the test signal has the very high immunity of noise, which can be applied with excellent precision to fault location on the aircraft cable. In this paper, the method of SSTDR was normally simulated in MATLAB. Then, an experimental setup, based on LabVIEW, was organized to detect and locate the fault on the aircraft cable. It has been demonstrated that SSTDR has the high immunity of noise, reducing some detection errors effectively. Copyright © 2014 IFSA Publishing, S. L.

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