Simultaneous estimation of vehicle sideslip angle and tire-road friction coefficient

We simultaneously estimate the vehicle sideslip angle and tire-road friction coefficient from generally given information from various sensors by using the differences in tire characteristics. In most previous studies, a linear vehicle model for determining the lateral force has been used, whereas we use a nonlinear model. Furthermore, we use Levant´s exact differentiator to determine the yaw angular acceleration from the yaw rate in real time. The proposed method can accurately estimate the vehicle sideslip angle and provide real-time information about road surface conditions without the need to use an expensive real-time kinematic global positioning system sensor.