Speed Sectioning Curvature Endpoint Determination
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Solution Overview
Problem
The existing methods for speed sectioning in high-speed trains require a large number of initial speed sections, leading to increased calculation amounts and reduced efficiency and timeliness of safety control.
Innovation Solution
A method and apparatus for speed sectioning that determine a coordinate point in an initial deceleration curve, calculate the curvature at that point, and use the curvature to determine the end point value of a current speed section, thereby reducing the number of speed sections and improving calculation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of initial speed sections are used for speed sectioning, then the accuracy of speed sectioning is improved, but the calculation amount increases and calculation efficiency decreases
Solution Approach 1:
The patent divides the speed range into multiple initial speed sections (e.g., 0-5km/h, 5-10km/h, etc.) and calculates curvature for each section. By segmenting the problem into manageable sections and using curvature-based endpoint determination, the method achieves accurate speed sectioning while avoiding the need to process an excessive number of sections, thus balancing accuracy with calculation efficiency.
Solution Approach 2:
The patent introduces curvature as a new parameter to determine speed section endpoints. Instead of using fixed or arbitrary endpoint values, the method calculates curvature at coordinate points in the deceleration curve and uses curvature threshold comparisons to dynamically determine endpoints. This parameter change enables adaptive endpoint selection that maintains accuracy while reducing the number of sections needed.
2Measurement precision
If a large number of initial speed sections are used for speed sectioning, then the precision of speed determination is improved, but the timeliness of safety control is reduced
Solution Approach 1:
The patent pre-calculates curvature values for coordinate points in the deceleration curve and stores them for quick reference. During real-time safety control, the system can quickly determine speed section endpoints by comparing current speed against pre-computed curvature data, avoiding time-consuming calculations and ensuring timely safety responses while maintaining precision.
Solution Approach 2:
By using curvature as the determination parameter instead of processing multiple speed sections, the patent achieves fast endpoint identification. The curvature parameter provides a direct mathematical criterion for endpoint detection, eliminating the need to evaluate numerous sections and enabling real-time safety control with high precision.
3Manufacturing precision
If multiple initial speed sections with fixed decelerations are used, then the braking curve accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent replaces the complex multi-section fixed deceleration approach with a curvature-based endpoint determination method. Instead of managing multiple speed sections with different fixed deceleration values, the system uses a unified curvature calculation and threshold comparison mechanism to determine endpoints, simplifying the overall system while maintaining or improving braking curve accuracy.
Solution Approach 2:
The patent substitutes the mechanical approach of dividing speed into many fixed sections with a mathematical approach using curvature analysis. The curvature-based method provides a continuous, smooth criterion for endpoint determination, replacing the discrete, step-wise sectioning approach and reducing system complexity while improving accuracy.
Data Source
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AI summary
Embodiments of the present invention disclose a method and an apparatus for sectioning a speed, an electronic device and a storage medium. The method includes: determining a coordinate point in an initial deceleration curve according to an end point value of an initial speed section and an initial speed section deceleration; determining a curvature at the coordinate point in the initial deceleration curve; and determining an end point value of a current speed section from the end point value of the initial speed section according to the curvature at the coordinate point, so as to acquire a current speed section. A technical solution provided by the embodiments of the present invention may be implemented to solve the problem that since there are a great number of initial speed sections, and a calculation amount is large, subsequent calculation efficiency and timeliness of safety control are caused to be reduced, thereby improving accuracy and efficiency of speed sectioning.