Development of Steering Control Method for Steer-by-Wire System Requiring No Changes in Steering Wheel Hand Position

Future steering systems must be compatible with automated driving systems to improve cabin space design flexibility. To address this need, a steer-by-wire system with no mechanical linkage is being developed. This paper proposes a control method for a variable steering gear ratio steer-by-wire system with reaction force control to achieve a natural steering feel with a fixed hand position on the steering wheel. Moreover, as a feature of steer-by-wire system, this paper also demonstrates the effectiveness of a control method that transmits only necessary road inputs to the driver.