互通式立交网络流的协同控制

利用图论方法将互通式立交展开为一种多源多汇的赋权有向网络,并对其性质进行描述与定义;通过对立交网络动态流谱及最大流计算得到其容量限制并确定受控弧分布;以受控弧队列长度和冗余等待时间设计了阻抗均衡因子,建立了动态阻抗均衡条件下的网络流协同控制方程,并制定了控制策略;以实际对象进行虚拟控制仿真,结果表明了所提策略和方法的有效性.

Coordinated networks flow control for interchange

On relieving the growing serious urban periphery traffic congestion,the problem of designing control strategy for interchange is considered,it is a novel research field with challenges.This paper presented a novel methodology based on graph theory and network flow theory,the former is used to modelling by unfolding a generic interchange into a directed weighted network with multi origins and destinations,and the latter is used to calculate the dynamic flow spectrum,clarify maximum flow and to certify the controlled ramp arc.In addition,two novel resistance balancing factors aim to increase the fairness of control are designed with ramp queuing lengths and redundancy time,incorporating flow spectrum and based on control theory,a linear model with a quadratic objective function is constructed,and the corresponsive control law algorithm is designed with the adaptive queuing management method.A preliminary simulation-based investigation of the virtual coordinated ramp metering control problem using the methodology demonstrates the comparative efficiency and its ability to maintenance network performance while balancing cost distribution is better.