Comparative Study of Active Steering Control Systems for Vehicle Handling Enhancement

T. Shim (USA)


Steering control, four wheel steer, vehicle handling, nonlinear predictive control


This paper presents a development of four wheel steering control system that can assist a driver to regain vehicle stability during emergency maneuvers. This control system is developed using a nonlinear predictive control method and an 8 degree-of-freedom vehicle model with a Magic Formula tire model. The additional steering inputs at front/rear axles from the control system improve vehicle yaw rate and side slip responses. The performance of the proposed four wheel steering control system is compared to a rear wheel steering control system through simulation. The effectiveness and limitations of two different steering control systems are also discussed.

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