| CPC B62D 6/008 (2013.01) [B62D 5/0463 (2013.01); B62D 6/10 (2013.01)] | 11 Claims |
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1. A device for generating a steering reaction torque signal in a steer-by-wire steering system of a vehicle, the device comprising:
a target frequency determiner for determining a target frequency based on a rotational speed of a wheel when the vehicle is at a moving state, the target frequency being determined as (i) the number of rotation per second of the wheel or a multiple of the number or (ii) a value obtained by dividing a moving distance per second of the vehicle by (π×wheel diameter) or a multiple of the value;
a rack force signal processor for generating a filtered rack force signal excluding a cutoff band including the target frequency from a rack force signal of the vehicle, the rack force signal being determined based on a steering torque applied to a steering column of the vehicle;
a target reaction torque determiner for determining a target reaction torque based on the filtered rack force signal; and
a reaction torque signal generator for generating a steering reaction torque signal based on the target reaction torque,
wherein
the rack force signal processor is configured to generate the filtered rack force signal excluding the cutoff band using a notch filter set to have a specific margin frequency on both sides of the target frequency, and
the specific margin frequency is differently set depending on a driving environment or a driving mode of the vehicle.
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