Train Compartment Brake Control Adaptation
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Solution Overview
Problem
Current brake control systems for rail transit trains with fixed formations are inflexible and require significant software changes to accommodate variations in train composition, making them unsuitable for trains with changing numbers of cars or formations.
Innovation Solution
A brake control method that calculates the braking force for each compartment in real-time based on the current train formation, using a Train Control and Management System (TCMS) to send periodic signals and a coding module to identify the number and type of compartments, allowing independent brake control without master/slave hierarchies between Brake Control Units (BCUs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed formation brake control system is used, then the brake control is stable and reliable, but the system cannot adapt to changes in train composition and requires software changes when formation changes
Solution Approach 1:
The brake control system dynamically adapts to different train formations by automatically detecting the number of vehicles and recalculating braking forces in real-time. The BCU determines whether the train is in 8-car or 16-car formation mode and adjusts control parameters accordingly, eliminating the need for fixed software configurations for each formation type.
Solution Approach 2:
The system changes control parameters based on detected formation conditions. When the number of vehicles changes, the BCU modifies braking force distribution parameters, pressure control values, and calculation coefficients to match the current formation, allowing a single software system to handle multiple formation configurations.
2Adaptability or versatility
If the number of cars in the train is changed, then the train can accommodate different transport volumes, but the existing brake control system requires software rewriting and extensive testing
Solution Approach 1:
The brake control system performs self-configuration by automatically detecting the train formation through vehicle number detection and autonomously determining the appropriate control mode. The BCU self-adjusts braking parameters without requiring external software modification or manual configuration, enabling immediate adaptation to formation changes.
Solution Approach 2:
The system continuously monitors the train formation status through feedback from vehicle detection devices and network communication. When formation changes are detected, the feedback loop triggers automatic recalculation of braking forces and adjustment of control parameters, ensuring the system always operates with correct parameters for the current formation.
3Reliability
If a hierarchical brake control structure with master BCU is used, then the control is centralized and coordinated, but the system complexity increases and maintenance becomes more difficult
Solution Approach 1:
Each BCU is designed with universal functionality to perform both local brake control and centralized coordination functions. Any BCU can serve as the master controller depending on which vehicle is detected as the first vehicle, eliminating the need for dedicated master/slave roles and reducing structural complexity while maintaining coordinated control.
Solution Approach 2:
The brake control system is segmented into independent functional units distributed across different vehicles. Each BCU independently calculates braking forces for its local brake devices while communicating with other BCUs through the network, dividing the centralized control function into distributed segments that maintain coordination through standardized communication protocols.
Data Source
AI summary
A train compartment brake control method includes: acquiring the number of train compartments of a current train; acquiring the number and type of a current train compartment; and on the basis of a train brake instruction and the number of train compartments of the current train, calculating a braking force of the current train compartment, and performing brake control on the current train compartment. The technical solution described in the present application is applicable to a train having any number of train compartments. The above method acquires the number of train compartments of a train in real time, calculates the braking force required by each train compartment according to the number and type of a current train compartment, and performs brake control on the train.