说明：  汽车安全距离模型Mazda模型仿真：dbr:制动距离，v：本车车速，：相对车速，：本车最大减速度（这里 取），：目标车的最大减速度（这里取8m/s2），：驾驶员反应延迟时间（这 里取 0.1s），：制动器延迟时间（这里取0.6s），d0:最小停车距离（这里取3m）
(Mazda model simulation of vehicle safety distance model: DBR: braking distance, V: vehicle speed, relative speed, maximum deceleration of the vehicle (taken here), maximum deceleration of the target vehicle (taken here as 8m / S2), driver response delay time (taken here as 0.1s), brake delay time (taken here as 0.6s), d0: minimum stopping distance (taken here as 3M))