On a Modeling of Shimmy Phenomenon for Two Wheeled Vehicles

This paper describes an analysis of shimmy phenomenon appeared on a steering system of two wheeled vehicles. Initially, in order to confirm the shimmy, experiments were carried out on a test track and on a drum tester, so that the mode can be clearly defined.

Next, we construct the steering model for a two wheeled vehicle using a new tire model to show the dynamics. From the results, it is found that the model describes the shimmy not only qualitatively but also quantitatively. Furthermore, it is clear that the tire characteristics have a strong influence on shimmy with the steering model.