Trackside Multimode Train Control System for Hybrid CBTC CTCS Operation
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Solution Overview
Problem
Existing train control systems face challenges in seamlessly integrating and transitioning between different systems, such as CBTC and CTCS, especially during line transformation projects, which requires reducing interference with existing systems and ensuring compatibility for hybrid operations.
Innovation Solution
An independent multimode train control system based on a trackside platform is implemented, which includes a trackside train control system and an interlocking system. This system allows for hybrid operation compatibility and automatic degradation mode in case of failures, ensuring smooth operation and minimizing disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switching transition region is provided for CBTC and CTCS systems to allow region-crossing switching, then system compatibility is improved, but device complexity increases due to requiring two sets of on-board devices
Solution Approach 1:
The patent introduces a trackside control system as an intermediary between different train control systems (CBTC and CTCS). This trackside platform provides the switching and coordination functions that were previously required to be implemented on the train itself, thereby eliminating the need for dual on-board devices while maintaining system compatibility across different control modes
Solution Approach 2:
The patent replaces the mechanical/dual-device approach with a software-based trackside control system. Instead of requiring physical installation of two sets of on-board devices, the system uses a centralized trackside control platform that manages mode switching and coordination through software, thereby reducing hardware complexity while maintaining adaptability
2Reliability
If all sections within a route coverage are cleared and unlocked before operation, then system reliability is improved, but time loss increases due to longer time interval between preceding and posterior trains
Solution Approach 1:
The patent implements dynamic route clearance and unlocking mechanisms where the trackside control system can selectively clear and unlock sections based on real-time train positions and operational requirements. This dynamic approach allows the system to maintain reliability by ensuring proper section clearance while reducing the overall time interval between trains compared to static pre-clearance methods
Solution Approach 2:
The patent applies preliminary action by pre-configuring route sections and establishing clearance protocols before train operation begins. The trackside control system pre-establishes the necessary clearance states and unlocking mechanisms, allowing trains to operate with reduced time intervals while maintaining system reliability through proper preliminary preparation
3Reliability
If the incoming and outgoing capabilities of the entire system are restricted due to technical conditions on route, then system reliability is improved, but productivity decreases due to restricted train operation
Solution Approach 1:
The patent segments the route into multiple controllable sections that can be independently cleared and unlocked. The trackside control system manages each section's clearance and unlocking status separately, allowing trains to operate with improved productivity by enabling section-by-section access rather than requiring entire route clearance, while maintaining reliability through controlled section management
Solution Approach 2:
The patent changes the parameters of route clearance and unlocking from static, all-or-nothing conditions to dynamic, section-based control. The trackside control system adjusts clearance and unlocking parameters in real-time based on train positions and operational requirements, thereby improving productivity by reducing unnecessary restrictions while maintaining system reliability through controlled parameter management
Data Source
AI summary
An implementation method for an independent multimode train control system based on a trackside platform is provided. According to the implementation method, a trackside train control system and an interlocking system are provided independently to meet requirements of hybrid operation of trains having different systems; and at the same time, during operation of a train in a moving block mode, once a trackside control system fails or an on-board system fails, the multimode train control system can ensure that the train is degraded automatically and operates according to a degraded mode.