Dynamic Speed Control for Shunting Yard Track Brakes
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Solution Overview
Problem
Current shunting systems in rail traffic face inefficiencies in performance due to fixed target run-out speeds and lack of adaptive control based on individual wagon or group properties and brake capacity, leading to suboptimal braking and increased follow-up times.
Innovation Solution
A method for operating shunting systems that determines entry and exit speeds for each track brake dynamically, taking into account the specific properties and work capacity of each brake, allowing for optimized control and coordination across multiple brakes to ensure efficient deceleration and increased performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed target run-out speeds are used for track brakes, then the control system is simple to operate, but the system performance and productivity are reduced
Solution Approach 1:
The patent implements dynamic speed determination for track brakes by calculating entry and exit speeds based on individual wagon or group properties (mass, number of axles, mass distribution) and specific brake work capacity. This replaces fixed target run-out speeds with dynamically adjusted speed values that optimize braking efficiency and throughput for each specific process.
Solution Approach 2:
The system changes operational parameters (entry speed, exit speed, target run-out speed) based on varying conditions including wagon properties, brake capacity, and process characteristics. The control device automatically adjusts these parameters to maximize hump performance while maintaining safe braking operations.
2Productivity
If adaptive control based on individual wagon properties and brake capacity is implemented, then system performance increases, but the control complexity and calculation requirements increase
Solution Approach 1:
The control device performs preliminary calculations of entry speeds and exit speeds before the braking process begins, based on pre-known wagon properties and brake characteristics. This advance preparation allows the system to optimize each braking event without real-time complexity during the actual braking operation.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor actual braking performance and work capacity of track brakes, using this information to continuously refine and adjust speed determinations for subsequent processes, thereby improving performance while managing control complexity through learned optimization.
3Loss of time
If dynamic speed determination for multiple track brakes is implemented, then follow-up times are reduced, but the computational requirements and control coordination increase
Solution Approach 1:
The control system segments the braking process into distinct phases for different track brakes (first track brake, second track brake uphill), determining entry and exit speeds for each segment independently based on local conditions. This segmentation allows optimized control of each brake without requiring complex real-time coordination between all brakes simultaneously.
Solution Approach 2:
Entry speeds for the first track brake and exit speeds for the second track brake are determined in advance based on process properties and brake work capacity, allowing the system to minimize follow-up times by preparing speed values before processes arrive, rather than calculating them in real-time during braking operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables better control of track brakes, optimizing the operation of shunting systems by ensuring compliance with target run-out speeds, reducing follow-up times, and enhancing overall system performance, particularly in humps with asymmetrical distribution zones.
Implementation Method 1
In shunting shunting systems, wagons or groups of wagons, which are also referred to as shunts, are sorted from a mountain track into different directional tracks using the force of gravity acting on the processes
Implementation Method 2
wagons or groups of wagons, which are also referred to as shunts, are sorted from a mountain track into different directional tracks using the force of gravity acting on the processes
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a method for operating a switching hump yard (10). At least one value for an entry speed into a first retarder (70) is ascertained for the respective cuts (100, 101) in the form of rolling cars or car groups for the first retarder (70) on the basis of a target release speed from the first retarder (70). At least one value for a release speed from a second retarder (60) that lies uphill relative to the first retarder (70) is determined for the second retarder (60) on the basis of the ascertained at least one value for the entry speed into the first retarder (70). The second retarder (60) is controlled taking into account the determined at least one value for the release speed. The invention further relates to a control device (200, 220, 230) for a switching hump yard (10).