A Study on the Correlation between Fallback Torque and Controllability of Steer-by-Wire System

The SbW system, consisting of SFA and RWA, does not have a mechanical connection, so when the SFA fails, the driver is in a situation where the steering wheel does not provide feedback. Therefore, if only fallback torque remains in SbW, the controllability that the driver perceives, depends on the amount of the fallback torque. In this study, the correlation between controllability perceived by the driver and the amount of fallback torque is studied and the safest fallback torque is derived.