Abstract
We focused on the fact that the ease of driving is enhanced by EPS stiffness, theoretically considered the influence by torsional rigidity from a steering angle(steering wheel) to front wheel angle(front tires). As a result, it turned out that a front wheel angle was determined by not only to a steering angle but also the influence of the dynamic state of vehicles, and it was intercepted the influence of the dynamic state of vehicle by making steering torsional rigidity into high torsional rigidity. Next, the simulation was performed about the control performance of vehicle at the time of a disturbance input, and the validity of the theoretical verification was confirmed. Finally, the torsional rigidity range for high torsional rigidity steering utilization was defined.
