Unified chassis control with electronic stability control and active front steering for under-steer prevention

This paper presents an unified chassis control (UCC) with electronic stability control (ESC) and active front steering (AFS) for under-steer prevention. Even if the previously proposed UCC gives good performance using AFS, there are still chances to generate severe under-steer situation. To cope with the under-steer situation caused by AFS, it is necessary to limit the use of AFS. For this purpose, new optimum yaw moment distribution scheme is proposed. Through simulation on vehicle simulation software, CarSim®, the proposed method is shown to be effective for under-steer prevention.