Advanced Train Control Systems by B. Ning

By B. Ning

This exact quantity on complex teach keep watch over structures (ATCS) contains chosen papers from the hugely winning COMPRAIL convention sequence on railways and different transit structures. complicated teach keep watch over platforms are taking part in a huge function in enhancing the potency and defense of teach operation, appearing as their "brains and nerves." Computer-based ATCS's make railways extra trustworthy and more secure. regularly, those structures include 4 components: the important keep an eye on method; the station keep an eye on structures and wayside structures; the on-board keep watch over structures; and the communique community, together with cellular verbal exchange. From the perspective of the full lifecycle, an ATCS contains layout and improvement; re-design for a distinct line software; simulation verification and checking out; and defense evaluation of the procedure and subsystems. those suggestions are recognized to people who are accustomed to usual ATCS comparable to ETCS, CTCS for major line railways and CBTC for transit structures.

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The ground equipment is composed of an ATC logic unit, transmitter/receiver units and signal device controllers for signal lights and switch motors. Adding, a substitute blocking function with a radio communication path will be set against the case of, for example, a track circuit failure between stations. 1 Rationality of functional integration An ATC ground system detects occupied tracks. If an ATC system stops by some failure, the location information of trains within the related area becomes unknown, and then the control for switches and signal lights becomes impossible.

The configuration of CBTC systems is first described. The key technical issues are addressed. The fundamental modular of CBTC and its interface requirements are defined. The transit methods from the present train control systems based on track circuits, transponders and other traditional means to CBTC systems are also put forward. Keywords: automation control system, rail system, computer and communication, standardization. 38 Advanced Train Control Systems 1 Introduction The CBTC (Communication Based Train Control) system has been known as the development direction of control systems for rail systems in the world.

The train operation control model is the key to ensure train to be safe operation in CBTC systems. In a CBTC system, there is no block section. Train following interval is calculated in real time method. The figure 3 shows the principle of train following interval control in CBTC systems. In addition to the safety protection distance (df), the interval of the two following trains (train 1 and train 2) is the safe braking distance of train 2 in theory. V2(d) is the speed curve of the following train 2.

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