A study on adaptation of SBW parameters to individual driver’s steer characteristics for improved driver–vehicle system performance

This study focuses on the adaptation of steer-by-wire (SBW) parameters to the driver’s steer characteristics for a vehicle equipped with SBW system whereby steering gain and derivative time constant between the steering-wheel angle and the front-wheel-steer angle can be freely set. First of all, it presents a simple yet effective method to estimate the driver’s steer parameters from experimental data based on the general driver’s model. Driver’s parameters for young and aged drivers are compared. SBW parameters are then adapted to the identified driver’s parameters based on a simple analytical method, and its effect on the driver–vehicle system performance improvement is examined through an experimental study, for the case of aged drivers.