冰蚁 发表于 2013-6-20 12:06
abs 是防这种抱死,用的方法包括 threshold braking 和 cadence braking 。threshold braking 就是尽量 ...
Braking beyond the slipping point causes the tire to slide and the friction adhesion between the tire and driving surface is reduced. The aim of threshold braking is to keep the amount of tire slip at the optimal amount, the value that produces the maximum frictional, and thus braking force. When wheels are slipping significantly (kinetic friction), the amount of friction available for braking is typically substantially less than when the wheels are not slipping (static friction), thereby reducing the braking force. Peak friction occurs between the static and dynamic endpoints, and this is the point that threshold braking tries to maintain.
所以如果施加的刹车压力始终保持在轮子滚动时的最大摩擦力矩那一点上,就可以产生最大的摩擦力,来获得最小的刹车距离。
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