the parasitic oscillation as shown in fig2 can be resolved into the two main oscillation orders as shown in fig3 using the dashed line the third order main oscillation is shown while the solid line shows the fourth order main oscillation if these two oscillations are superimposed on each other then the parasitic oscillation profile shown in fig2 is produced according to the invention through the use of a single wheel both the third order main oscillation and also the fourth order main oscillation are now damped for this purpose the shape or geometry of the non round wheel 3 is constructed in such a way that counter oscillations are generated which exhibit an oscillation spectrum u2014 idealized for the present embodiment u2014 that is opposite the spectrum according to fig2 in terms of amplitude profile and that is similarly formed from dominant third and fourth order counter oscillations such a wheel is shown as an example in fig4 this wheel is obviously not round it has an irregular peripheral shape that is obtained in the shown example by superimposing triangular and quadrangular wheel geometries the triangular wheel geometry is used for generating third order counter oscillations while the quadrangular wheel geometry is used for generating fourth order counter oscillations the superimposition of these wheel geometries leads to the wheel shape.