Evaluation of a Betaless Instantaneous Cornering Stiffness estimation scheme for electric vehicles

This contribution evaluates a new Beta-less Instantaneous Cornering Stiffness (ICS) estimation scheme. It relies on the availability of the lateral tire forces measurement which in near future can be realized with economic (low cost) sensors. The estimation is only available if the change in the tire slip angle is profound enough as it is not the case during constant cornering. However, as it is shown with simulation and experimental results the ICS can be estimated in important vehicle dynamic situation and the information used for lateral tire force saturation detection and control. Additionally, it could be used to shorten the convergence time of "linear" cornering stiffness estimation schemes. Since it requires some derivatives of measured signals, a special signal processing techniques must be applied to overcome inaccuracy due to sensor noise.