Abstract
The steering wheel of a steer-by-wire (SBW) vehicle is free from road-disturbance because of the lack of mechanical connection. There is less need for disturbance attenuation and the SBW actuator can be mounted rigidly on the vehicle chassis. A bench test using actual SBW system demonstrates that the steering stiffness becomes larger than the electronic-power-steering (EPS) stiffness. A driving experiment and a closed-loop simulation show that the increase of this stiffness plays a crucial role in reducing work load for the SBW driver.
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