基于双向最大绿波带宽的通用干道协调控制数解算法

针对现有数解算法假定绿波设计速度固定取值的局限,提出了一种基于双向最大绿波带宽的通用数解算法.首先确定了相邻理想间距的取值空间.其次推导了上行、下行偏移绿信比的计算公式.再次,给出了理想绿灯中心线其上下方绿信比的计算公式.最后,以双向绿波带宽之和最大为优化目标,以上行、下行绿波设计速度与信号周期为优化变量,建立了最大绿波带宽优化模型.以实例验证文中通用数解算法的有效性.分析结果表明:文中通用数解算法能够突破上行、下行绿波设计速度固定取值的局限,能够更易于获得理想的绿波协调控制效果,具有较好的通用性与实用性.

General Algebraic Algorithm for Arterial Coordination Control Based on Maximum Bidirectional Progression Bandwidth

To address the limitation of current algebraic algorithm with assumed fixed values of designed speed for green wave, a general algebraic algorithm for maximizing bidirectional progression bandwidths is proposed. First of all, the value range of adjacent ideal interval is determined. Secondly, formulas for calculating the outbound offset green ratio and inbound one are deduced. Further, formulas for calculating the green ratio above and below the ideal central line of the green time are proposed. Finally, the optimized model of maximum progression bandwidth is established with the maximum sum of the bidirectional progression bandwidths being the optimization objective and the outbound and inbound designed speed and signal cycle being the optimization variables. The general algebraic algorithm proposed in this paper is verified with examples. Analysis result shows that the general algebraic algorithm could break through the limitation of fixed values of designed speed for green wave and obtain ideal effect of green wave coordination in an easier manner, displaying decent generality and practicality.