平交道口冗余控制系统的建模及成本收益分析

将成本收益的分析方法应用在控制系统设计中。采用随机Petri网基于控制过程及系统可靠性对道口控制系统进行建模。在可靠性建模中,基于冗余系统的冷备及热备原理对控制系统的各个部件分别进行描述。基于统计数据确定非冗余控制系统Petri网模型参数。针对冷备及热备的冗余控制系统各部件的系统模型,通过仿真确定冗余系统相对非冗余系统所降低的道口事故率,继而计算出冗余控制的收益。将收益与增加设备的成本进行对比分析,结果表明,控制系统中不同部件的冷备及热备冗余都具有不同的成本收益。

Modeling and Cost-benefit Analysis of Redundant Control System for the Level Crossing

The cost benefit analysis method was used in design of the control system. The level crossing control system was modeled based on the control process and the system dependability with stochastic Petri nets. The components of the control system were modeled respectively based on the cold and hot standby of the redundancy system in the dependability context. The parameters of the Petri nets model with non-redundancy control system were identified based on the statistic data. The decreased accident rates were ...