Improving yaw dynamics by feedforward rear wheel steering

Active rear wheel steering can be applied to improve vehicle yaw dynamics. In this paper two possible control algorithms are discussed. The first method is a yaw rate feedback controller with a reference model, which has been reported in a similar form previously in literature. The second controller is a feedforward controller, which only requires the front wheel steering angle and vehicle forward velocity. It has a similar performance as the feedback controller. Both controllers are evaluated using an enhanced bicycle model, which includes tyre relaxation behaviour and suspension steering compliance.