We have proposed yaw moment observer (YMO) for a direct yaw control (DYC) of electric vehicles (EVs). So far, we applied YMO to various yaw-rate control systems, and verified the effectiveness of these systems. However, we carried out experiments only in the campus of the university, the robustness of YMO was not examined in high speed region. Various kind of variations like increase of vehicle inertia and tire friction will influence YMO. Then, in this paper we consider the robustness of YMO in high speed region on test road by simulations and experiment.
