冬季来临，轮胎容易老化，与路面的摩擦系数降低，出现抓地不稳的状况。
Winter, tire easily aging, lower coefficient of friction with the road surface, the situation appears unstable grip.
目前用于路面及机场道面摩擦系数检测的设备数量众多，类型各异。
Nowadays, there are many types of equipment to measure the friction of pavement.
基于轮胎的魔术公式模型，研究了轮胎在路面的最佳滑移率和最大摩擦系数随汽车速度的动态变化过程。
Based on the tire magic formula model, the dynamic variation process of the tire optimal slip ratio and the maximum friction coefficient on the road with the vehicle velocity is researched.
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