Vibrations of a delivery car excited by railway track crossing

Vertical vibrations of a delivery car passing through railway tracks have been investigated in this paper. The application of recurrence plots allows to examine short time series of acceleration non-stationary courses. Recurrence quantification analysis and square deviations estimated in small windows have been used to monitor car vibrations and transient behaviour. Measuring acceleration on the ‘‘sprung” and ‘‘unsprung” masses of a vehicle has enabled also to test the quality of a car suspension.