Determined out of the suspension roll signals

Since the stiffness of the main springs as well as the suspension roll center height are known, any difference in suspension roll can only be caused by a difference in roll stiffness between the model and the real car.

Therefor comparing the suspension roll travel is a very good tool to determine the stiffness of the anti roll bars as well as the distribution of roll stiffness. In the examples shown on the right, it can be seen that a 10% change in roll stiffness can easily be identified by this approach.

Note: please be aware that the suspension roll is influenced by the vertical spring stiffness of the tires. Especially if the car drivers with significant different front and rear tires, and/or significant different tire pressures.