The mechanism of high-speed train following operation control was studied keeping in mind the "moving" and "length changing" characters of train spacing in the railway moving automatic block system. We analyzed the behavioral adjustment problems of high-speed trains in the process of train following operation to lay down the integrated optimal indexes for dynamic evaluation of the behavioral adjustment, and then used the Petri network to give the formal description of train operation states, and the causes and process of behavioral adjustments. The control model was established to deal with the behavioral adjustments of the high-speed train in the process of its following operation, and the comprehensive evaluation method of train behavior as well as the control strategy algorithm and specific implementation steps were given. The simulations results show that the method can give help to dynamic control of train spacing and effective realization of train operation with safety, efficiency and stability.%针对铁路移动闭塞系统列车间隔呈现出“移动”和“长度变化”的特征,研究高速列车追踪运行的控制机理.对高速列车追踪运行过程中的行为调整问题进行分析,确定了行为调整动态评价的综合性优化指标,然后运用Petri网对列车运行状态及其行为调整的起因、过程作了形式化描述；建立高速列车追踪运行过程中行为调整的控制模型,给出列车行为综合评价方法、控制策略算法及具体的实现步骤.仿真表明,研究方法有助于列车间隔动态控制,可有效实现列车安全、高效和平稳运行.
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