a rotating machine is drevin by an electric machine with PN=22kW, nN=1470min-1. the current control can be approximated by a first order lag with the time constant Ts1=2t=500 micro second. the torque can be considered to be proportionalto the current in the examined operation.
the moment of inertia of the motor is: J(mot)= 0.0047 kgm2
the working machine has a momrnt of inertia: J(load)= 0.2 kgm2
the velocity range is given by: 0<n<3000 min-1
the measured velocity signal is filtered with a low pass filter with a time constant of T(g)=4 ms