基于事件的控制技术在地铁列车运行中的应用

Event-Based Control Technology and the Application in Subway Train Operation

研究移动闭塞条件下地铁列车的运行规律,建立地铁列车运行模型,将基于事件的控制技术应用到地铁列车控制中。引入运动参考变量,求出在以站间最小运行时间为目标的单列列车控制中,列车运行速度、加速度关于列车走行距离的表达式,根据列车走行距离实时调整规划列车的运行。研究移动闭塞条件下地铁列车间的控制,采用基于事件的控制技术和编队思想降低列车间的最小追踪允许间隔,在保证不撞车以及尽量减少站外停车的前提下,提高地铁线路的通过能力,并且能够方便地实现系统的重新配置以及各子系统间的协调协作。以相邻的3列列车运行为例,研究在移动闭塞条件下后续列车的控制策略,根据列车的走行距离以及前后列车间所要求保留的安全距离,动态调整列车的运行速度、加速度。仿真结果表明,运用基于事件的控制技术来控制列车的运行,可提高列车的正点率到95%。

The operation rule of subway train is studied under movable block system condition and the operational model of subway train is constructed. Event-based control technology is adopted to control subway train operations. The velocity and acceleration expression with respect to the distance are deduced by introducing the motion reference variable in the control problem which the object is to minimize the running time. The control between multi trains is discussed, the method of decreasing the headway and increasing the carrying capacity is discussed by using the event-based technology and formation theory to ensure the safety and to avoid the stop out of station, this method can take it easy to reconstruct the system and to increase the cooperation between subsystems. Taking account of three trains, the control strategy of the following train is given, the velocity, acceleration of the train can be adjusted according the safe distance between the successive trains and the distance which the train has covered. The simulation results show that the indices of train punctuality can be 95% by adopting event-based technology to control train operation.