中文摘要：

入口匝道控制是缓解高速公路交通拥挤的主要控制方式之一。在分析高速公路交通流运行特性的前提下,选择交通流平均速度、入口匝道排队长度作为模糊控制的输入量,入口匝道调节率作为模糊控制的输出量;然后,借鉴入口匝道控制的原理和模糊控制系统的设计步骤,运用MATLAB仿真软件确定了相应的隶属函数、模糊控制规则、模糊推理以及反模糊化的方法;最后,从交通流平均速度、入口匝道排队长度以及入口匝道调节率这三者之间的输入/输出特性曲面,可以明显地看出该模糊控制系统更符合匝道控制的实际情况,并且在行程时间和总服务流量上均优于定时控制。

英文摘要：

The on-ramp control is one of the key control ways to relieve the traffic congestion of the freeway.In this paper,under the premise of analyzing the operational characteristics of the freeway traffic flow,the average speed of the traffic flow,the on-ramp queue length are selected as the inputs of the fuzzy control,the on-ramp metering rate is selected as the output of the fuzzy control.Then with the MATLAB simulation software,the membership functions,the fuzzy control rules,the fuzzy reasoning and the defuzzification method are identified based on the theory of the on-ramp control and the design process of the fuzzy control system.Finally,it is apparent that this control system meets the actual situation of the ramp control according to the surface of the input / output characteristics among the average speed of the traffic flow,the on-ramp queue length and the on-ramp metering rate.And the simulation result of the fuzzy control is compared with that of the fixed-time control,which reveals that the fuzzy control is better than the fixed-time control in the total travel time and the total service volume.