Handwheel damping control of active steering system
AssigneeGeneral Motors Corporation
InventorsWilliam Lin, Shih-Ken Chen, Robert Bolio
Life of this patent
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Abstract
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.
Claims20
A method for providing active front steering for a vehicle that includes hand-wheel damping control, said method comprising:
- providing a vehicle speed signal of the speed of the vehicle;
- providing a hand-wheel steering angle signal indicative of the vehicle operator's desired steering direction;
- generating a damping control signal using the vehicle speed signal and the steering angle signal;
- and
- apply the damping control signal to a controller that controls the steering of the vehicle, said damping control signal providing the hand-wheel damping control.
An active front steering system for a vehicle, said system comprising:
- a vehicle speed sensor for providing a vehicle speed signal of the speed of the vehicle;
- a steering angle sensor providing a steering angle signal indicative of the vehicle operator's desired steering direction;
- a damping control sub-system responsive to the vehicle speed signal and the steering angle signal, said damping control sub-system generating a damping control signal for providing vehicle hand-wheel damping;
- and
- a controller responsive to the damping control signal, said controller controlling an actuator that controls the steering of the vehicle.
An active front steering system for a vehicle, said system comprising:
- a damping control sub-system for generating a damping control signal for providing vehicle hand-wheel damping;
- and
- a controller responsive to the damping control signal, said controller controlling an actuator that controls the steering of the vehicle.
Dependencies are inferred from the claim text.