Rapid extraction method for small snaking operation characteristics of high-speed train

A technology for operating characteristics and high-speed trains, applied to pattern recognition in signals, instrument, character and pattern recognition, etc., can solve problems such as incomplete extraction of operating state features, and inability to quickly extract small serpentine evolution characteristics of trains, etc.

Active Publication Date: 2019-08-02
SOUTHWEST JIAOTONG UNIV
View PDF12 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method for quickly extracting small-scale snake-like running features of high-speed trains, which solves the problem of incompl

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rapid extraction method for small snaking operation characteristics of high-speed train
  • Rapid extraction method for small snaking operation characteristics of high-speed train
  • Rapid extraction method for small snaking operation characteristics of high-speed train

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0096] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0097] Such as figure 2 As shown, a rapid extraction method for the small snaking running characteristics of a high-speed train includes the following steps:

[0098] S1. Extracting the original vibration signal when the high-speed train is running, and preprocessing it;

[0099] Among them, the original vibration signal includes 1-bit axle box lateral vibration signal, 1-bit frame lateral vibration signal and 4-bit upper...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a rapid extraction method for small snaking operation characteristics of a high-speed train. The method aims to solve the problem that an existing method cannot quickly identify the small snaking motion state (normal operation, small convergence, small divergence and large snaking) of the high-speed train. The method comprises the following steps of: decomposing a preprocessed signal by adopting an EEMD (Empirical Mode Decomposition) method; converting the result into an energy matrix, performing joint approximate diagonalization (JAD) processing on the energy matrix under a non-stationary condition, and fusing the energy matrixes of a plurality of sensors to obtain fused characteristics of the small snaking running state of the high-speed train. The fusion featuresare put into the least square method support vector machine to be trained and identified, it is verified that the method can rapidly and accurately separate the four operation states of normal operation, small convergence, small divergence and large snaking of the high-speed train, and therefore the operation safety of the train is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of train running state feature extraction, and in particular relates to a method for quickly extracting small-scale snaking running features of a high-speed train. Background technique [0002] High-speed trains are developing rapidly in China. As of 2018, China is the country with the most mileage of high-speed railways in operation and under construction in the world. High-speed railways have brought convenience to people’s travel, but with the increase in the speed of high-speed railways, the safety and stability of its operation has become an issue. focus of attention. [0003] During the operation of high-speed trains, studies have found that when the vehicle's speed exceeds a certain critical value, the high-speed train will produce an unstable snaking motion. Snaking instability will generate large lateral wheel-rail force, which will lead to train derailment in severe cases. Therefore, snaking inst...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06K9/00
CPCG06F2218/02G06F2218/08G06F2218/12
Inventor 宁静冉伟陈春俊李艳萍张兵方明宽
Owner SOUTHWEST JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap