Cornering Simulation Test

The test simulates a pure cornering event. Inputs are the c.g. height, the desired cornering g load, and optionally aerodynamic download and tire pneumatic trail. Based on the c.g. height, the g load, and the vehicle weight, a roll moment is applied to the chassis while corresponding ground plane lateral force is applied at each tire contact. Lateral force distribution amongst the four tires may be specified or can be proportional to the vertical load. The chassis is controlled in force control such that it finds a natural steadystate cornering attitude. Chassis loads and displacements, as well as corresponding loads, displacements, and orientations at each of the four wheels are measured.

Further, after running the cornering simulation, the chassis motion is replayed through the rig without the ground plane forces present. This allows you to separate kinematics effects from compliance effects.

Here are some characteristics that are measured in a Cornering Simulation Test:

  • Axle Steer
  • Steer Rate
  • Camber Rate
  • Jacking Forces
  • Roll Rate (per G)
  • Roll Stiffness Total
  • Lateral Weight Transfer
  • Tire COP Migration
  • Tire Deflection Lateral
  • Roll Rate (per Torque)
  • Tire Lateral & Vertical Forces
  • Dynamic Cross Weight
  • Friction / Hysteresis