ABSTRACT:
For railway operations worldwide, train
rear-end collision accidents occasionally occur, resulting in heavy casualties
and property loss. To avoid the occurrence of such incidents, a novel early
warning method of train tracking interval based on centralized traffic control
(CTC), or simply CTC interval prewarning, is proposed. When combined with the
existing automatic train protection (ATP), the monitoring of train tracking
interval is doubled. The proposed method calculates the minimum safety interval
in real time and compares it with the actual spatial distance. When the actual
spatial distance is less than the minimum safety interval, particularly when
the ATP is at fault, the proposed method is capable of raising the alert and
taking control measures to effectively avoid rear-end collision accidents. At
the same time, this method displaces the manual supervision of train operation,
thereby relieving labor intensity, and improves the effectiveness of
supervision. This paper analyzes the necessity and feasibility of the proposed
CTC interval prewarning method and explains the basic architecture of the
system, data acquisition, tracking interval calculation, prewarning rules, and
implementation. The CTC tracking interval calculation model has been established,
and the table of warning distance of the different train speeds has been
calculated. The reliability model of the train control system (TCS) has been
established based on the CTC interval prewarning method, which is used to
analyze the reliability and safety of the TCS.
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