An active front steering (AFS) system that provides hand-wheel damping.
The AFS system includes a damping control sub-system that determines a
hand-wheel angular velocity based on the rate of change of a hand-wheel
angle signal. The damping control sub-system determines the damping
control signal by multiplying the angular velocity of the hand-wheel
angle signal with a control gain. The damping control signal is added to
a steering signal from a variable gear ratio control sub-system to
generate a steering command signal. The damping control sub-system sets
to the damping control signal to zero if a signal from a vehicle
stability enhancement sub-system is activated.