Vibration measurements in Poland

Deutsche Plasser Poland together with Politechnika Wrocławska (Wrocław Technical University) performed vibration measurements to compare the effectiveness of a DGS 62N and a Unimat 09-4x4/4S Dynamic.

The measurements were carried out to compare the outputs of a DGS 62N with a double tamping unit and a Unimat 09-4x4/4S Dynamic with a single tamping unit.


The measurements should provide conclusions on two areas of interest:

  • a comparison of the outputs of the two machines at different speeds and frequencies
  • an examination to determine if the machines can achieve a degree of track stability that would permit trains running on the track at over 100 km/h

For the collection of the required data, 3D acceleration sensors were used to obtain the measurements; the values were then compared and analysed.


We are very pleased with the results. The measurement data shows that both the DGS 62N and the Unimat 09-4x4/4S Dynamic achieve a track stability that allows trains running on the track at over 100 km/h.

Furthermore, the measurement data indicate that measuring runs with the use of a DRP should be carried our prior to stabilisation. With the data obtained it can be ensured that the track is tamped and stabilised to the best possible quality.


The project was financed using an “innovation voucher” from the Regional Programme of the European Fund and the European Fund for Regional Development.

“The results of the research project are highly welcome, and we are pleased to be able to offer suitable machines for all requirements of track stabilisation in Poland.”

Wojciech Musial

Head of Poland office