Road surface impact stimulation device of steer-by-wire system
AssigneeHl Mando Corporation
InventorSeung Gi Min
Life of this patent
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Abstract
The present disclosure provides a road impact simulating apparatus of a steer-by-wire system, the apparatus comprising: a Signal processor for determining a wheel speed difference value between wheels, and determining a lateral acceleration difference value between an estimated lateral acceleration and a sensed lateral acceleration of a vehicle; an Impact determinator for determining whether there is a road impact based on the wheel speed difference value; and a Torque calculator for determining a reaction force torque according to the road impact based on the lateral acceleration difference value if it is determined as the road impact.
Claims16
A road impact simulating apparatus of a steer-by-wire system, the apparatus comprising a controller configured to:
- determine a wheel speed difference value between wheels, and determine a lateral acceleration difference value between an estimated lateral acceleration of a vehicle and a sensed lateral acceleration of the vehicle;
- determine whether there is a road impact based on the wheel speed difference value between the wheels;
- and
- determine a reaction force torque according to the road impact based on the lateral acceleration difference value if it is determined as the road impact,
- wherein the controller is configured to, if a first wheel speed difference value between the left and right front wheels is greater than or equal to a first reference value, a second wheel speed difference value between the left and right rear wheels is less than or equal to a second reference value, and a third wheel speed difference value between the left front and rear wheels or a fourth wheel speed difference value between the right front and rear wheels is greater than or equal to a third reference value, determine that there is the road impact.
A road impact simulating method of a steer-by-wire system, the method comprising:
- determining a wheel speed difference value between wheels, and determining a lateral acceleration difference value between an estimated lateral acceleration of a vehicle and a sensed lateral acceleration of the vehicle;
- determining whether there is a road impact based on the wheel speed difference value;
- determining a reaction force torque according to the road impact based on the lateral acceleration difference value if it is determined that there is the road impact;
- and
- if a first wheel speed difference value between the left and right front wheels is greater than or equal to a first reference value, a second wheel speed difference value between the left and right rear wheels is less than or equal to a second reference value, and a third wheel speed difference value between the left front and rear wheels or a fourth wheel speed difference value between the right front and rear wheels is greater than or equal to a third reference value, determining that there is the road impact.
Dependencies are inferred from the claim text.