Abstract
An increased accident on high way is often created by unstable vehicle motion, which can not be controlled. This condition is caused by some factors, in which one of these perturbation factors originates the vehicle rollover or excessive vehicle motion. To analyze the rolling motion of vehicle needs to consider types of vehicle axle including its suspension location and characteristics, and the connection between the vehicle body and axle.
This paper emphasized the analysis on rolling motion of vehicle model having either swing or beam axle system. Vehicle rolling motion is represented by multibody dynamics, which involves the motion of vehicle body, axle, suspension, and tire in the perpendicular plan to the forward direction. The suspension and tire of this system are represented by springs and dampers.
The rolling motion equation is expressed as a differential equation of Y-Z plan, which is determined by deriving rotation transformation matrix known as Euler angle convention combined with Lagranges equation. Using the same differential equation derivation, the motion equation of swing and beam axle systems can be established. The simulation with the input vehicle parameters of swing and beam axles can be done by using these motion equations. The simulation result of vehicle model rolling motion shows that the critical condition of swing and beam axle systems to rollover motion can be determined.