基于隶属函数的高速公路安全距离模型研究

为了改善高速公路防追尾安全距离模型,对模型中的驾驶员反应时间进行研究,分析不同车速时驾驶员反应时间对安全距离的影响。驾驶员反应时间受驾龄、应变能力、性别、心理生理状况、车速等多种因素的影响。基于模糊数学中隶属函数的有关理论,利用Matlab软件,在驾驶员反应时间大小允许的范围内,综合考虑各种主要因素,确定驾驶员反应时间。通过具体实例说明该方法的应用,结果证明,应用模糊数学,可以计算出不同的驾驶员,在不同的车速时的反应时间。

Research on Freeway Safety Distance Model Based on Membership Function

In order to improve the accuracy of safety distance model for rear-end collision on freeway,driver's reaction time to safety distance is researched.The effect of driver's reaction time on safety distance is analyzed at different speeds.Driver's reaction time is affected by driving experience,adaptability,sex,psychological and physical conditions and other factors.In the permission scope of driver's reaction time,by considering the main factors,the driver's reaction time can be determined by using the theory of membership function in fuzzy mathematics and the software Mat lab.The application of the method is illustrated through specific examples.The result shows that driver's reaction time for different drivers at various speeds can be calculated by applying fuzzy mathematics.