Effect of yaw velocity feedback in electric power steering system on handling stability of vehicle

Using a yaw velocity sensor into EPS (electric power steering system), we can build up a man-vehicle system model including EPS in the paper. After simulation analysis, it is shown that vehicle's yaw velocity response is improved remarkably by introducing yaw velocity negative feed into the model with front wheel's steer angle step input and the EPS powered torque response curve arises evenly and slowly. This is useful to vehicles' driving at high speed on low friction coefficient road so as to improve the vehicles' safety in driving.