It can be seen from equation (2-4) that adjusting the brake pressure can cause changes in wheel angle deceleration: from equation (2-10), the instantaneous vehicle speed V during braking can be calculated, and the slip rate of each wheel can be calculated from equation (2 -7) (2-8) and the load of each axis can determine the road adhesion coefficient and adjust it, so it is known that ABS can use dW / dt (angular acceleration) or slip rate S, or the combination of slip rate and angular acceleration as control parameters .