Reliability Analysis And Testing Methods Of The CTCS-3 Train Control System With DFTA In A Simulation Environment
Author(s)
W. ShangGuan, J. Xiao, B. Cai, B. Heydecker, J. Wang
Abstract
Reliability is one of the key problems of an automatic system, especially to the huge, complex, multiple target-based, safety critical and reliability-dependent train control system. A system reliability analysis method based on a dynamic fault tree was proposed to analyse possible fault causes of a whole system in a HLA (High Level Architecture) simulation platform, and according to the principle of the dynamic fault tree model, the conversion from dynamic logic gates to Markov Chain was achieved. The reliability analysis through the dynamic fault tree method of train-ground communication subsystem was completed, which included a qualitative and quantitative analysis. A test of train-ground communication failure was established based on the fault injection method, the fault injection tool in a simulation environment enabled each module of the train control system running according to the fault testing program. The simulation result shows that compared with the conventional static fault tree analysis method, using dynamic fault tree analysis can conduct a better reliability analysis, using the fault injection method that can evaluate and test a simulation system based on HLA effectively, which can improve the reliability of the simulation system.
Keywords
train control system, reliability, dynamic fault tree analysis, high level architecture, importance degree, fault injection
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