A Fault Diagnosis Approach For Railway Track
Circuits Trimming Capacitors Using EMD And
Teager Energy Operator
Author(s)
S. P. Sun, H. B. Zhao & G. Zhou
Abstract
The trimming capacitor is an important component of a track circuit used for
train detection in the railway train control system. In order to ensure the required
dependability and availability levels, their working conditions shall be monitored
in a timely and efficient manner. This paper presents a diagnosis approach of
trimming capacitors based on Empirical Mode Decomposition (EMD) and
Teager Energy Operator (TEO) theory. The EMD is used to decompose the
short-circuit current signal into two parts. One is the sum of a set of Intrinsic
Mode Functions (IMFs), which feature the fault information of the defective
trimming capacitors; the other is the residual element relating to the signal
variation trend. Then the TEO of IMFs is performed and the instantaneous
frequencies are derived, so as to highlight the fault features. Experiments with
simulated data show that multiple defects can be detected effectively using this
approach. Compared with the existing methods which are only able to detect one
failed capacitor, the integrated method represents a rather improved
performance.
Keywords: track circuit, trimming capacitor, Empirical Mode Decomposition,
Teager Energy Operator.
Keywords
track circuit, trimming capacitor, Empirical Mode Decomposition,Teager Energy Operator
Related Book
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