The Reliability Analysis and Simulation Method of Train Control System Based on Markov

2014 ◽  
Vol 556-562 ◽  
pp. 2333-2336
Author(s):  
Shang Guan Wei ◽  
Jie Xiao ◽  
Bai Gen Cai ◽  
Jian Wang
Keyword(s):  
Control System ◽  
Quantitative Analysis ◽  
Reliability Analysis ◽  
Fault Tree ◽  
Simulation Method ◽  
Train Control ◽  
Dynamic Fault Tree ◽  
Train Control System ◽  
Markov Method ◽  
Tree Method

This paper mainly studies the reliability of trackside subsystem of the CTCS-3 train control system. Dynamic fault tree method is used for reliability analysis. The fault tree is decomposed into static and dynamic sub-trees. Based on Markov method, precise quantitative analysis is performed on the dynamic sub-tree. The failure probability of the trackside subsystem is calculated. Through analyzing the structural importance degree and pivotal importance degree of the bottom events, suggestions for improving the reliability of the system are concluded.

Reliability analysis on the train control system in the CTCS-3 operating mode

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Lijuan Shi ◽  
Jian Wang
Keyword(s):  
Control System ◽  
High Speed ◽  
Fault Tree ◽  
Operating Mode ◽  
Content Type ◽  
Train Control ◽  
Dynamic Fault Tree ◽  
Train Control System ◽  
Train Operation ◽  
Operation Control

Purpose This paper aims to study the reliability of the high-speed train operation control system in the Chinese Train Control System Level 3 (CTCS-3) operating mode. Design/methodology/approach Dynamic fault tree and Bayesian network method are adopted to analyze the reliability and weakness of the CTCS-3 system. Findings First, a physical architecture and data flow diagram of the CTCS-3 system are established according to the typical structure and functions of the CTCS-3 system. Second, the dynamic fault tree of the CTCS-3 system is constructed. Considering the prior probability of the bottom event and the existence of dynamic redundancy, the dynamic fault tree is transformed into a Bayesian net. The reliability of the CTCS-3 system is carried out based on the prior probability and the weakness that affects the reliability of the system based on the posterior probability is also analyzed by the Bayesian network. Finally, it is disclosed that the impact of the on-board subsystem on the reliability of the CTCS-3 system is generally greater than that of the ground subsystem. The two weakest modules in the onboard subsystem are the driver-machine interface (DMI) and balise transmission module (BTM) and the weakest one in the ground subsystem is Balise. The analysis results are generally consistent with the malfunctions in the field operation of China’s high-speed railway. Originality/value (1) By reasoning, the reliability of the train operation control system in the CTCS-3 operating mode meets the standard requirements. (2) Through backward reasoning, it is found that the failure of the onboard subsystem leads to a greater probability of failure of the train control system. (3) The DMI, BTM and automatic train protection computer unit modules are weak components in the onboard subsystem. Vital digit input&output, train interface unit and train security gateway are rarely involved in previous research, the result in this paper shows that these three modules are also weak components in the subsystem, which requires attention.

Reliability Analysis of Plug Door System Based on Dynamic Fault Tree

2014 ◽  
Vol 627 ◽  
pp. 207-211
Author(s):  
Yan Hui Wang ◽  
Li Feng Bi ◽  
Li Jie Li
Keyword(s):  
Reliability Analysis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Deep Understanding ◽  
Structural Redundancy ◽  
Tree Model ◽  
Dynamic Fault Tree ◽  
Working Principle ◽  
Ontology Module ◽  
Markov Method

The plug door system is an important guarantee of the safe operation of the emu, since it has structural redundancy, correlation function and fault dynamic characteristics, this paper uses the dynamic fault tree analysis method for reliability analysis. In deep understanding of the basis of the structure and working principle of the plug door, dynamic fault tree model is established by the way of structure ontology, Module iteration is introduced , and the Markov method is adopted to solve the reliability. At the last, we obtained the equipment failure rate and the reliability of the whole system.

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