基于对象Petri网的列车运行模型及仿真

Model and Simulation of Train Operation Petri Net with Objects

用带有对象的Petri网对列车群运行进行建模,具有规模小、灵活、直观、模块性好、可操作性良好、属性描述方便、有利于不确定性问题的处理等优点;仿真实验验证了面向对象和Petri网的结合既可以克服面向对象方法缺少模型分析、验证手段的缺点,又可以克服Petri网在系统描述上的不足。文章描述了仿真系统的总体结构、主要数据结构和仿真策略。由于设计中采用了Petri网模型、路网数据、运行图相分离的原则,使系统具有良好的普适性和扩充性。

The model of train operation Petri net with objects has small scale and the advantages in flexibility, readability, modularization, operability, attribute describing, uncertainty processing etc. The simulation of the system proves that the cooperation of object-oriented approach and Petri nets can not only overcome the insufficiency on modeling analysis and testing tool in Object-Oriented approach, but also overcome the incompleteness of describing system in Petri net. The paper describes the structure of the stimulating system, main data structure and simulation strategy. The system is designed to have separating Petri net model, railway network information and train operation chart so it has the good generality and expansibility.