基于最小安全距离的跟驰模型的建立和仿真研究

Car-following Model Based on the Minimum Safety Distance and Simulation Study

在常用的基于车间时距的安全距离模型和基于制动过程的安全距离模型的基础上,建立了在单车道跟驰状态下,前导车分别处于静止、匀速和匀加速等不同状态下,跟随车与前导车不发生追尾碰撞的最小安全距离模型,并考虑了车辆加速度渐变的过程,避免了以往模型中采用加速度突变的问题。最后通过Matlab仿真,验证了该模型能够很好地解决常用模型计算的安全距离出现偏差的问题。

Based on the two common safety distance models for car avoidance： one being of the time distance between two cars, another being of the braking process, the model on the minimum safety distance was established in consideration of the state of the front vehicle＇s still,velocity, constant acceleration and so on. And consider the gradual process of vehicle acceleration, avoiding the problem of acceleration mutation in old models. At last, simulation done with Matlab verified this model could resolve the inaccurate defects in computing safety left by the common models.