A system for determining an angular speed value (Vω) of an axle of a railway vehicle is provided. The system includes a deformation detection circuit coupled to the axle of the railway vehicle, the deformation detection circuit being arranged to detect a trend over time of a flexural deformation value of the axle due to a value of a normal load exerted by the axle on the rail, and a controller to estimate the angular speed value (Vω) of the axle as a function of a frequency f derived from the trend over time of the flexural deformation value of the axle detected by the deformation detection circuit. A method for determining an angular speed value (Vω) of an axle of a railway vehicle is also provided.
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