Automatic car steering control bridges over the driver reaction time

Abstract: A car driver needs at least five hundred milliseconds before he can react to unexpected yaw motions. During this time the uncontrolled car may produce a dangerous yaw rate and sideslip angle. Automatic steering control for disturbance rejection is designed such that it bridges over the driver reaction time, but returns the full steering authority to the driver thereafter. The solution is robust with respect to uncertainties in the road-tire contact and in the mass and velocity of the vehicle. The model representation is scaled by methods of similarity mechanics.