Fault Diagnosis for Compensating Capacitors of Jointless Track Circuit Based on Dynamic Time Warping

Table 6

Description of the diagnosis (classification) experiment based on DTW.

Item	Description
Vector dimension (the number of sampling points in a curve)	156
The number of classes	17
Local cost measure	𝑐𝑥,𝑦=𝑥−𝑦
Training data set	1 vector per class (without noise)
Testing data set	50 vectors per class with: (i) ±0.005 V uniformly distributed measurement noise; (ii) Smoothing filtering with 3 points; (iii) Deformation (see Appendix for details)
Testing result	Classification accuracy = 99.88%
Computation complexity	O (156 × 156 × 17 × (50 × 17))
Classification stability (minimum)	−0.0429 (0.1795 for correct classifications)
Classification stability (average)	0.9260