On-Board Train Control for Accurate Release Speed and Supervisory Location
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Solution Overview
Problem
Existing technologies struggle to accurately determine the release speed and supervisory location of a train, which is crucial for safe train operation, as they are often influenced by measurement errors and inaccuracies, leading to potential unsafe crossings of the end of movement authority.
Innovation Solution
A method and system for calculating the actual release speed and supervisory location by constructing various brake intervention and deceleration curves, considering track information and speed limits, to ensure accurate determination of the train's stopping point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the release speed is calculated based on simple distance and speed parameters, then the calculation is fast and simple, but the accuracy is insufficient leading to unsafe train operation
Solution Approach 1:
The patent segments the release speed calculation into multiple independent components: emergency brake intervention curve calculation, emergency brake deceleration curve calculation, service brake intervention curve calculation, and speed limit list integration. Each component handles a specific aspect of the calculation, making the overall complex problem manageable and solvable through systematic decomposition.
Solution Approach 2:
The patent performs preliminary calculations by pre-calculating and storing emergency brake intervention curves, emergency brake deceleration curves, and service brake intervention curves before the actual release speed determination is needed. This allows the system to quickly retrieve and apply pre-computed data during real-time operation, improving both accuracy and computational efficiency.
2Reliability
If the supervisory location is determined without considering measurement errors, then the determination is simple, but the train may unsafe cross the end of movement authority
Solution Approach 1:
The patent applies beforehand cushioning by calculating a supervisory location that includes a safety margin based on measurement errors. The supervisory location is determined by adjusting the end of movement authority position with compensations for distance measurement errors and speed measurement errors, ensuring the train stops before the actual supervisory location even under erroneous conditions.
Solution Approach 2:
The patent implements feedback mechanisms by continuously monitoring the train's actual position and speed, comparing them against the calculated supervisory location and release speed. The system adjusts the supervisory location and release speed based on real-time feedback from position sensors and speed sensors to maintain safe operation margins.
3Adaptability or versatility
If the release speed does not consider minimum speed limits from speed limit lists, then the calculation is simpler, but the train cannot comply with track speed restrictions
Solution Approach 1:
The patent achieves universality by integrating multiple speed limit lists that cover different track sections, gradients, and operational conditions into a single comprehensive release speed calculation. The system automatically selects the applicable speed limit list based on the current train position and track conditions, making the release speed determination adaptable to various operational scenarios.
Solution Approach 2:
The patent applies dynamics by making the release speed and supervisory location adjustable based on real-time operational conditions. The system dynamically updates the release speed by comparing calculated values with minimum speed limits from speed limit lists and adjusting the supervisory location based on current train position, gradient, and speed constraints to maintain compliance with varying track requirements.
Data Source
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AI summary
The present invention proposes a method, system, computer-readable storage medium and electronic device for determining release speed and supervisory location of a train control on-board device, relating to the technical field of rail transit operation control, and the method includes: acquiring an original release speed between a trip location and a supervision location; acquiring an original supervisory location corresponding to the beginning of the original release speed; acquiring, in a speed limit list, a minimum speed limit in a first list between the original supervisory location and the trip location; determining an actual release speed and an actual supervisory location based on the original release speed and the minimum speed limit in the first list. With the train's release speed and the supervisory location at the beginning of the release speed being accurately calculated through this method, it is guaranteed that the train won't cross the supervisory location while approaching the end of movement authority, thereby achieving a more convenient and accurate parking.