The present invention is directed to an armor system that protects vehicle occupants from lands mines or improvised explosive devices. The lower A-arm restrains the front ski from moving backward or laterally while the upper arm connects to the top of the spindle to ensure that the spindle remains substantially vertical when the front ski encounters a bump. Two-dimensional taught models are created by model creating means and stored as model information, and the positions of three or more reference points are determined by reference point position setting means.