Advanced Train Control Systems by B. Ning

By B. Ning

This certain quantity on complicated educate keep watch over structures (ATCS) involves chosen papers from the hugely winning COMPRAIL convention sequence on railways and different transit platforms. complicated teach keep watch over structures are enjoying a major function in enhancing the potency and protection of teach operation, appearing as their "brains and nerves." Computer-based ATCS's make railways extra trustworthy and more secure. typically, those structures include 4 components: the valuable keep an eye on method; the station keep an eye on structures and wayside platforms; the on-board regulate structures; and the communique community, together with cellular conversation. From the viewpoint of the complete lifecycle, an ATCS contains layout and improvement; re-design for a unique line program; simulation verification and trying out; and defense overview of the approach and subsystems. those recommendations are identified to those that are accustomed to standard ATCS comparable to ETCS, CTCS for major line railways and CBTC for transit structures.

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2 Control software and data For the ease of the software and data restore work with the SAINT system said above, signal light control boards are loaded comparatively the fixed control software and data those have not frequent restore cases. The ATC logic unit generates the control command and the classification information of a signal light. The roles of the signal device controller are to control ON/OFF of a lamp and to monitor the state of lamp current. Logic Controller 1) Classification information 1) Control state of a signal light 2) Conductivity of a lamp circuit 2) Control command 3) State of power supply Trackside Module (Signal light control board) 1) Lamp ON/OFF control 1) State of a lamp current From/to signal lights Figure 4: Signal light control.

Vital Computer Ⅰ Ⅱ Figure 2: Ⅲ Ⅳ …… On-board control system configuration. The accurate position system and the accurate speed measurement system are also the key technologies of CBTC systems. The accurate position and speed is the basic parameters of train operation control. In the position system, position calibration must be considered. In the speed measurement system, it is possible for combination of the different speed sensors (radar and axle generator) to be used to be suitable for the different speed of the train [3].

At present, CBTC systems have been applied in light rail network and underground systems in the world. Particularly, when the signaling system is upgraded and the new line is constructed, CBTC is their first choice for train control systems. For example, the New York Metro selected Siemens’s CBTC and Shanghai Metro selected Alstom’s CBTC systems. It is also clear that CBTC will be applied in main line railway network. In Europe, ETCS level 2 has been in trial since 2000 [5]. It is true that transit from traditional train control system to CBTC systems is a long process.

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