短时间加速度
But the calculation of target speed curve must have a better real-time performance, which is determined by the characteristic of short distance between stations and frequent acceleration and deceleration in urban rail transit.
但城市轨道交通站间距离短、列车加减速频繁的特点决定了节能目标速度曲线的计算必须具有一定的实时性。
And when the impact time is short even if you hit the floor with a modest speed the acceleration is high
而由于撞击时间之短,虽然他撞地时速度不快,加速度倒是着实不小
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