Magic Formula trigonometric equation is fitted by a combination of a tire test data, the same formula can be in the form of a fully convey the tire longitudinal force F X , the lateral force F Y , aligning moment M Z , overturning moment M X , resistance moment M Y and the longitudinal force, lateral force combined effect condition, so called "magic formula."
REF:
https://www.cnblogs.com/xpvincent/archive/2013/02/03/2890802.html