METHOD FOR OPERATING A STEERING APPARATUS OF A MOTOR VEHICLE COMPRISING AN ELECTROMECHANICAL STEERING-ASSISTANCE DEVICE

摘要

A method for operating a steering apparatus of a motor vehicle includes detecting interference-induced vibrations which act on a torsion bar of the steering apparatus and analyzing a frequency and amplitude of the interference-induced vibrations. A steering-stabilization function of the steering-assistance device is activated when a limit value for the amplitude of the interference-induced vibrations is exceeded. A drive signal is provided, with the steering stabilization function, for an electric motor of the steering-assistance device, so that the electric motor generates a compensation torque Mbar which acts on the torsion bar and at least partially counteracts the interference-induced vibrations. An indicator is formed from the frequency and the amplitude of the interference-induced vibrations and the carriageway induced vibrations are distinguished from vibrations caused by instabilities in the steering apparatus. The drive signal is generated for the electric motor in a vibration-dependent manner by combining the indicator with the steering-stabilization function.

主权项

1. A method for operating a steering apparatus of a motor vehicle that includes an electromechanical steering-assistance device, the method comprising:
detecting interference-induced vibrations which act on a torsion bar of the steering apparatus; analyzing a frequency and amplitude of the interference-induced vibrations; activating a steering-stabilization function of the steering-assistance device when a limit value for the amplitude of the interference-induced vibrations is exceeded; providing, by the steering stabilization function, a drive signal (AS) for an electric motor of the steering-assistance device, so that the electric motor generates a compensation torque Mbar which acts on the torsion bar and at least partially counteracts the interference-induced vibrations; forming an indicator (I) from the frequency and the amplitude of the interference-induced vibrations; distinguishing carriageway-induced vibrations from vibrations caused by instabilities in the steering apparatus; and generating the drive signal (AS) for the electric motor in a vibration-dependent manner by combining the indicator (I) with the steering-stabilization function.