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

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...

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 incomplete extraction of running state features of high-speed trains and the inability to quickly extract small-scale snake-like evolution features of trains in the prior art

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