State-based Risk Frequency Estimation
Of A Rail Traffic Signal System
Author(s)
Y. Zhang, J. Guo & L. Liu
Abstract
The rail traffic signal system is a safety-related system. According to the strict
requirement of safety, the use of international safety standards it requires in order
to carry out the systemic safety assessment. Risk frequency estimation plays a
key role in the process of risk-based safety assessment. Thus in this paper,
firstly, the existing risk frequency analysis methods are studied, then a statebased
fault tree model based on the original fault tree model and Markov
stochastic process model is proposed. After that, the state-based risk frequency
estimation flow of the rail traffic signal system is summarized. Lastly, we give
an example of the micro-computerized automatic block system between railway
stations with the wrong cancelling block. Then the state-based fault tree model is
established and its risk frequency quantitatively calculated. The method can
analyse the risk frequency of rail traffic signal systems scientifically and
accurately and solve the quantitative analysis issues of risk frequency in dynamic
random systems effectively.
Keywords: state-based, risk frequency, rail traffic signal system, fault tree
model, Markov stochastic process model.
1 Introduction
The rail traffic signal system is a safety-related system [1] and it takes charge of
the safety of rail traffic system operation. The traditional method to guarantee the
safety of the rail traffic signal system is based on technique specifications and
safety design, which have played a positive role. However, with the development
of high-speed railways and the microelectronics, computers, communications
and other modern information technology that is widely used, the traditional
Keywords
state-based, risk frequency, rail traffic signal system, fault treemodel, Markov stochastic process model
Related Book
Other papers in this volume
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