Railway Vehicle Speed Recommendations Using Position-Based Wear Data
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Solution Overview
Problem
Existing speed recommendation systems for railway vehicles do not fully exploit the speed capabilities of different types of vehicles within the same speed class, leading to suboptimal operation in terms of safety, passenger comfort, and wear, particularly on curved track sections.
Innovation Solution
A method that combines on-board information with speed determination values from wayside devices to differentiate speed classes, considering vehicle type, location, and track conditions, using a data storage to adjust speed recommendations based on safety, passenger comfort, and wear, and incorporating continuous monitoring of physical quantities to adjust speed limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same speed determination value is transmitted to all railway vehicles regardless of vehicle type, then safety is ensured for all vehicles, but the speed capabilities of different vehicle types are not fully exploited
Solution Approach 1:
The patent applies local quality by transmitting different speed determination values to different vehicle types based on their specific characteristics. Instead of using a uniform speed limit for all vehicles, the system tailors the speed determination values to match the capabilities of each vehicle type (e.g., high-speed trains vs. conventional trains), thereby optimizing speed capability utilization while maintaining safety through vehicle-specific parameter adaptation.
2Productivity
If speed determination values are adjusted frequently to optimize performance, then productivity improves, but system complexity increases
Solution Approach 1:
The patent implements dynamics by enabling flexible and frequent adjustment of speed determination values based on real-time operational conditions, vehicle type, and track characteristics. The system dynamically adapts speed limits rather than using fixed values, allowing optimization of operational efficiency while managing complexity through automated adjustment mechanisms that respond to changing conditions without requiring manual intervention.
3Loss of time
If higher speeds are permitted to reduce travel time, then passenger comfort deteriorates due to increased wear and fatigue
Solution Approach 1:
The patent applies parameter changes by adjusting speed determination values based on vehicle type characteristics and operational conditions. The system modifies speed parameters dynamically to balance travel time reduction with wear mitigation, using vehicle-specific parameters to allow higher speeds for vehicles better suited for them while maintaining lower speeds for vehicles more susceptible to wear, thereby optimizing the trade-off between time loss and harmful effects.
Data Source
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AI summary
The invention relates to a method of determining a vehicle speed recommendation (SR) for operating a railway vehicle (4) comprising the following steps: a) obtaining a first speed determination value (SD1) from an information transfer device (2) which is in particular arranged at least partly at a fixed position relative to the railway and determining a first speed value (S1) by using the first speed determination value (SD1), b) obtaining a position value (PV) of a railway vehicle position by means of a position determination system; c) determining a second speed determination value (SD2) from a data storage (7) by using the position value (PV), wherein the data storage (7) contains position-dependent speed determination values, and determining a second speed value (S2) by using the second speed determination value (SD2), wherein the second speed determination value (SD2) and/or the second speed value (S2) depend(s) on expected and/or actual wear of the railway vehicle (4) and/or on passenger comfort of passengers within the railway vehicle (4); d) outputting the vehicle speed recommendation (SR) as one of the first speed value (S1) and the second speed value (S2) according to a predetermined procedure.