基于成本车流模型的城市交叉路口优化控制

针对存在随机故障的城市交叉路口信号优化问题,从控制理论角度出发,根据其自身特性,借用最优生产控制思想,首次提出了道路和车流运行成本模型,且同时考虑路口的随机故障因素;在此基础上根据系统中存在多级时标和不可靠性、以及呈现一种递阶结构和运行不均衡的特点,将问题分解成不同层次的动态优化子问题,采用递阶控制策略对其进行降阶分解,从而得到交叉路口的优化控制策略.仿真结果表明,该模型更宜于实施于实际交通最优控制中.

Optimization control of urban intersection based on vehicle flow cost model

From the point of view of control theory,the urban intersection signal optimization involving stochastic breakdown is dealt with.Based on the nature of urban intersection and borrowing the idea of optimal production control,a new vehicle flow cost model of road is initiated,with the consideration of the stochastic breakdown at the intersection.Since the system is characterized by multi_horizon and unreliability,which makes it a hierarchical framework,a hierarchical control policy is constructed based on the horizon.Consequently,the optimal control policy of urban intersection signal is gotten.The simulation shows that the model is practical,powerful and promising.