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铁路信号计算机联锁系统是一个有着高可靠性、故障安全性和实时性要求的安全关键系统。本单位自行设计研制了一个满足这种高可靠性、故障安全性和实时性要求的容错计算机联锁系统SWJTUII。计算机联锁系统SWJTUII,硬件结构上,采用SIEMENS公司PLC作为主要控制部件,双机热备冗余结构,能实现无扰动的故障切换;联锁软件采用Petri网模型化,面向对象方法设计,Step7STL语言实现;通过仿真软件模拟列车运行来对系统进行仿真测试并取得良好效果。该系统已开发完成并投入应用。
Railway Signal Computer Interlocking System is a safety-critical system with high reliability, fail-safe and real-time requirements. The unit has designed and developed a fault-tolerant computer interlocking system SWJTUII to meet the requirements of such high reliability, fault safety and real-time. Computer Interlocking System SWJTUII, the hardware structure, the use of SIEMENS company PLC as the main control unit, dual hot standby redundancy structure, enabling disturbance-free failover; interlocking software using Petri nets modeling, object-oriented method design, Step7STL Language is realized; simulation is performed on the system through simulation software to simulate train operation and good results are achieved. The system has been developed and put into use.