Real Time Cardan Shaft State Estimation of High-Speed Train Based on Ensemble Empirical Mode Decomposition

Table 1

Related parameter and characteristic frequencies.

Index	Value
Train speed ()	248 km/h
Transmission ratio ()	2.22
Wheel diameter ()	0.88 m
Number of teeth ()	27
Pinions rotating frequency ()	55.35 Hz
Gear mesh frequency ()	1494.35 Hz
Big gear rotating frequency ()	24.93 Hz