angle that would be present if no juddering vibration were present in the drive train this is therefore in particular a torsion angle that adjusts on the basis of a non vibrating drive train load if no self excited vibrations are present as is evident from the bottom part of fig7 curve 62 essentially vibrates around this torsion angle u03c6 0 the value a u03c6 essentially corresponds to the amplitude that the juddering vibration exerts around torsion angle u03c6 0 according to curve 62 it may be provided that half wave 64 corresponds to a function that essentially may be expressed as u201c u2212 a sin u03c9 t the characteristic of juddering vibration 62 for example may be expressed by in this context m 0 represents a constant while u03c6 represents the torsion angle and d 2 u03c6 dt represents the second derivative of the torsion angle boundary conditions may be set here such as a boundary condition u03c6 0 u03c6 0 u2212 a u03c6 and d u03c6 dt 0 0 and u03c6 t 2 u03c6 0 and d u03c6 dt t 2 0 in this way exemplary conditions are established in this embodiment that are to be present at instants u201c 0 u201d or u201c t 2 u201d based on these boundary conditions and these characteristics in this example factor.