Virtual coupling small-group train control system and method based on train-train communication

Abstract

The invention discloses a virtual coupling small-group train control system and method based on train-train communication, and is a scheme which guarantees running safety and improves train running efficiency. In the scheme, in a small-group range, a main train continuously detects environment awareness and state data of the main train, environment awareness and state data of a front train are acquired by point-to-point direct communication, a control strategy is formed by comparison calculation according to a calculation result, and a rear train is adjusted to follow the front train within adynamic safe distance. By the strategy, the main train is controlled to follow the front train adaptively, and the trains in a small group can be assisted to cooperatively make correct active train control decision and operation. By the scheme, the running performance of the system can be greatly improved, requirements of flexible operation of urban rail transit can be met well, development spaceand potential are huge, and the virtual coupling small-group train control system and method based on train-train communication are future development tendency and the development direction of an urban rail transit traffic signal system.

Description

technical field [0001] The invention relates to the technical field of urban rail transit, in particular to a control system and method for a virtual connected small group train based on vehicle-to-vehicle communication. Background technique [0002] The train control system of urban rail transit has been developing continuously, from a point system that only relies on ground equipment such as signal machines and track circuits to assist train operation, to a communication-based automatic train control system (hereinafter referred to as CBTC system for train-to-ground communication), train control technology has achieved tremendous changes. The traditional CBTC system is characterized by the use of wireless communication media to realize two-way communication between trains and ground equipment, with a large amount of transmitted information and fast transmission speed, which greatly improves the passing capacity of section operations and shortens the interval between train ...

AI Technical Summary

Problems solved by technology

[0005] 1) There are too many interfaces between various subsystems, which increases the complexity of the system;

[0006] 2) There are many trackside equipment for train-to-ground communication, resulting in relatively high maintenance costs for the system;

[0007] 3) The train needs to pass through the ZC to obtain the running status information of the train in front, which cannot be obtained directly, thus increasing the reaction time of the system operation and reducing the performance;

[0008] 4) Due to the mutual restriction of various subsystems on the trackside, the flexibility of system operation is poor

However, the disadvantages of this scheme are: 1) it is mainly used in the train collision protection of high-speed railways, and cannot be applied in urban rail transit to improve train transportation capacity and operating efficiency; 2) each train not only needs to perform one-to-many and many-to-one Vehicle-to-vehicle direct communication also requires vehicle-to-ground communication with the ground at the same time, and the requirements for vehicle-mounted equipment are too high

3) The anti-collision calculation results are sent to the human-computer interaction subsystem, and the driver manually performs the collision avoidance operation. This method also needs to consider special circumstances such as the driver's reaction time when executing this method, which has certain potential safety hazards

However, the disadvantages of this type of scheme are: 1) the lines of urban rail transit are relatively long, the distance between trains for vehicle-to-vehicle communication is uncertain from hundreds of meters to several kilometers, and some elevated lines are in open spaces, so the direct communication between trains The situation is complicated. At present, there is no safe and reliable inter-train direct communication technology that can fully meet the needs of this type of solution.

At the same time, the satellite communication subsystem mentioned in the patent (201610799966.5) does not work well in the closed space underground of urban rail transit

2) Although part of the ground equipment has been canceled, the train needs to carry out vehicle-ground communication and vehicle-to-vehicle communication at the same time, which requires too much equipment on the vehicle

3) The safety and reliability of the relative speed train tracking technology of "hitting a soft wall" is still to be discussed

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