Abstract: This paper expounds the concept and expression of switched control system.Combining the railway signal system，a few switched definitions of route generating are given out.This paper brings forward a k setups route searching algorithm and puts out a new-style route generating algorithm based on switched control.Based on whether or not hostile signal in railway signal system，the process of designing switched algorithm is analyzed.Some instances of practical engineering project are presented.The emulation item results show that the time level of this switched algorithm is lower than that of chart searching algorithm with a series of switches，so the efficiency of choosing route is enhanced.

Key words: switched control, interlock route, hostile signal, topology graph of railway station

摘要： 阐述了切换控制系统的概念和表达形式，结合铁路信号系统给出了几个与进路生成有关的切换定义。提出了一种k步进路搜索算法思路，并在此基础上提出一种新型的基于切换控制的进路生成算法。分析了铁路信号系统在有无敌对信号情况下切换算法的设计过程，结合实际工程项目给出了一些实例。通过项目仿真结果表明，算法通过一系列的切换生成进路的时间数量级较图搜索算法明显减少，从而提高选路的效率。

关键词: 切换控制, 联锁进路表, 敌对信号, 站场拓扑图