Train Control Device Speed Profile Management
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Solution Overview
Problem
Conventional train control systems experience repeated acceleration and deceleration when a preceding train is delayed, leading to inefficient travel and potential disruption to following trains, as they attempt to minimize delay and influence on subsequent trains.
Innovation Solution
A train control device that acquires schedule information from a preceding train and calculates limit speeds for each block, creating a travel plan to prevent excessive speed and minimize disruption by adjusting between constant-speed running, coasting, and deceleration based on the preceding train's position and schedule, using stored signal expansion information to determine optimal speed profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the train is decelerated when the preceding train and the train come close to each other and then accelerated when they become far away, then the delay of the train is minimized and the influence on the following train is minimized, but the train experiences repeated acceleration and deceleration which reduces travel smoothness and efficiency
Solution Approach 1:
The control device performs preliminary deceleration of the train before it actually comes close to the preceding train, based on predicted position and speed information. This prevents the need for repeated emergency deceleration and acceleration cycles, thereby minimizing train delay while maintaining smooth travel without abrupt speed changes
Solution Approach 2:
The system dynamically adjusts the train's speed by switching between multiple operation modes (deceleration operation, constant speed operation, and acceleration operation) based on real-time position and speed differences relative to the preceding train. This dynamic control optimizes both delay minimization and travel smoothness by selecting the appropriate operation mode at each moment
2Loss of time
If the train is accelerated to catch up with the preceding train when they become far away, then the train delay is minimized, but the repeated acceleration increases energy consumption and reduces travel efficiency
Solution Approach 1:
The control device performs preliminary deceleration to maintain an optimal distance from the preceding train, preventing the need for subsequent acceleration to catch up. This eliminates unnecessary energy consumption from repeated acceleration while still minimizing overall train delay through proactive speed management
Solution Approach 2:
The system maintains continuous optimal spacing from the preceding train through sustained speed control, avoiding the stop-start pattern of repeated acceleration and deceleration. This continuous control reduces energy consumption by keeping the train in efficient operating conditions throughout the journey
Data Source
AI summary
A train control device, according to one embodiment, includes a storage unit, an acquiring unit, and a control unit. The storage unit is configured to store therein information of a plurality of limit speeds corresponding to a plurality of respective blocks and being determined based on a block on which a preceding train traveling at least one ahead is located. The acquiring unit is configured to acquire schedule information of the preceding train indicating a time at which the preceding train exits each of the blocks. The control unit is configured to determine a limit speed in each of the blocks associated with a travel of a train, based on the acquired schedule information and the information of the limit speeds; and to create a travel plan of the train using the determined limit speed.