Control methodology for a multi-axial wheel fatigue system

A method for obtaining desired loading on a wheel rim, the method comprising:

• providing a wheel assembly in contact with a drum surface, the wheel assembly being rotatable about an axis defining a lateral axis, and wherein a vertical axis extends through a drum surface in contact with a tire of the wheel assembly and is orthogonal to the lateral axis, and a longitudinal axis is defined orthogonal to both the lateral and vertical axes;
• calculating an overturning moment applied to the wheel rim about the longitudinal axis;
• adjusting at least one of force loads applied to the wheel rim and a camber angle of the wheel rim relative to the drum surface to obtain desired loading on the wheel rim based on the calculated overturning moment;
• recording the force loads applied to the wheel rim and the camber angle of the wheel rim relative to the drum surface at the desired loading on the wheel rim;
• and
• using the recorded the force loads applied to the wheel rim and the camber angle of the wheel rim relative to the drum surface in a wheel testing machine to obtain the desired loading on another wheel rim.