Shimmy is a technical problem puzzling the vehicle manufacturer for a long time.When dynamic unbalance tire forces of wheels inspire sustaining interferential torque to make wheels rotate around kingpin,shimmy will happen.Steering system make left wheel connect with right wheel,which resist the tiny right-and-left asymmetry structure and keep stability of kinetic states of two wheels.In order to describe the right-and-left wheels relation,a perfect steering system is set up and embeds into the whole vehicle model.Some key characters of steering system are considered to analyze their influence on shimmy.Through dynamic simulation,the significant results are provided for solving shimmy issue.
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