Virtual Coupling for Faulty Train Transfer
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Solution Overview
Problem
Conventional urban rail transit (URT) signal systems rely heavily on ground equipment, leading to inefficiencies and safety concerns due to the need for manual detection and transfer of faulty trains, which disrupts normal operations and increases maintenance costs.
Innovation Solution
A URT train control system based on vehicle-vehicle communications, utilizing an intelligent train supervision system, train manage center, data communication system, and intelligent vehicle on-board controllers to enable virtual coupling operations, where a normal train can lead a faulty train to a designated zone for transfer without the need for a dedicated rescue train.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual monitoring and transfer of faulty trains is used, then train safety can be ensured, but operation efficiency decreases and maintenance costs increase
Solution Approach 1:
The system enables trains to autonomously detect faults, report their status, and execute transfer operations without manual intervention. The intelligent vehicle on-board controller automatically monitors train status, communicates with the train management center, and controls the transfer process, allowing the system to serve itself in fault detection and handling.
Solution Approach 2:
The system implements continuous feedback loops where trains report their operational status to the train management center, which processes the information and sends back control instructions. This real-time feedback mechanism ensures safe operation while maintaining high efficiency through automated responses to fault conditions.
2Reliability
If dedicated rescue trains are deployed for faulty train transfer, then faulty trains can be transferred, but operation efficiency of normal trains is greatly affected
Solution Approach 1:
The system enables any normal train to perform the function of a rescue train when needed. Through the virtual coupling operation, a normal train can autonomously couple with and transfer a faulty train, eliminating the need for dedicated rescue trains and allowing normal trains to serve multiple functions including fault recovery.
Solution Approach 2:
The system creates a virtual copy of the rescue function through software and communication protocols. Instead of requiring physical dedicated rescue trains, the intelligent control system replicates rescue capabilities across all normal trains through the train management center's coordination and the virtual coupling mechanism.
3Ease of operation
If conventional train-ground-train communication is used, then train control can be achieved, but turnaround period increases and control flexibility is limited
Solution Approach 1:
The system extracts the ground equipment from the control loop and replaces it with direct vehicle-to-vehicle communication. The intelligent vehicle on-board controllers communicate directly with each other and with the train management center through wireless communication, eliminating the need for physical ground equipment and reducing turnaround time.
Solution Approach 2:
The system replaces the mechanical ground-based communication infrastructure with wireless electronic communication between vehicles and the management center. This substitution of mechanical systems with electronic communication reduces physical constraints, improves flexibility, and decreases the time required for train control operations.
4Ease of operation
If numerous ground equipment are deployed, then train operation control can be achieved, but system complexity and maintenance costs increase
Solution Approach 1:
The system extracts and removes ground equipment from the train control architecture. Control functions previously performed by ground-based signal systems, switches, and other infrastructure are transferred to intelligent vehicle on-board controllers that communicate wirelessly with the train management center, significantly reducing ground equipment requirements.
Solution Approach 2:
The system copies control intelligence from ground-based systems into the vehicle on-board controllers. By embedding the same control logic and decision-making capabilities within the trains themselves, the system eliminates the need for complex ground equipment while maintaining full control functionality through software-based solutions.
Data Source
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AI summary
An urban rail transit train control system based on vehicle-vehicle communications, comprising an intelligent train supervision (ITS) system, a train manage center (TMC), a data communication system (DCS), and an intelligent vehicle on-board controller (IVOC) provided on each of trains, the ITS system. The TMC and the IVOC are communicatively coupled by the DCS, and IVOCs of the trains communicatively coupled by the DCS. IVOCs of all the trains report first train operation information to the ITS system and second train operation information to the TMC in accordance with a predetermined period. The TMC sends the received second train operation information to the ITS system. The ITS system determines a following train that needs a virtual coupling operation and a head train corresponding to the following train, and dispatch a virtual coupling operation instruction to the head train IVOC to perform a virtual coupling operation of trains.