Abstract: The linear and nonlinear mathematical models for a half car are developed. The rode profile of discrete event type is selected and simulation is carried out. The results show that the errors for linear and nonlinear models change in a wide range. If the road working condition is in the selected state the linear model can be instead of nonlinear one. Because the road working conditions in China are complex the nonlinear mathematical simulation is needed to validate the results if the design is carried out using a linear model.

Key words: A half car, Linear model Nonlinear model, Simulation