Method for reducing chatter vibrations in a drivetrain

1. A method for emulating a vibration absorber by reducing chatter vibrations in a motor vehicle drivetrain having a drive unit, a vehicle transmission, and an automated friction clutch, the method comprising the steps of:

receiving an input signal from at least one sensor;

determining, using a plurality of interconnected linear control elements, a transfer function;

determining, using the input signal and the transfer function, an output signal to modulate a target clutch torque; and,

sending the output signal to the automated friction clutch to modulate clutch torque.

2. The method of claim 1 , wherein the transfer function comprises a maximum value in the vicinity of a resonant frequency of the motor vehicle drivetrain.

3. The method of claim 2 , wherein the transfer function has a phase shift.

4. The method of claim 3 , wherein the phase shift is adaptable.

5. The method of claim 2 , further comprising the step of adjusting a rise or drop from the maximum.

6. The method of claim 1 , further comprising the step of filtering, using a high pass filter, the input signal to suppress low-frequency components while emulating the vibration absorber.

7. The method of claim 1 , further comprising the step of amplifying the input signal wherein amplification is carried out when emulating the vibration absorber.

8. The method of claim 1 , wherein the linear control elements are each parameterizable separately.

9. The method of claim 1 , wherein a signal of a transmission input shaft rotation speed is fed to the transfer function for emulating the vibration absorber as an input value, and the transfer function delivers a signal for modulating a clutch torque request as an output value.