Overloaded or unbalanced freight wagon coefficient pick-up based on wavelet-analysis for running train

This paper bring a method of picking-up overloaded or unbalanced freight wagon coefficient using wavelet analysis.For the wavelet decomposing and recomposing make it's efficient to pick-up the interesting frequency component, using it to analysis the wheel-track force, then get the overloaded or unbalanced coefficient.It efficiently solved the difficulty of estimating the vehicle running state by manual or static test.