Train stability evaluation method and system based on recurrence plot analysis

Abstract

The invention discloses a train stability evaluation method based on recurrence plot analysis. The method comprises the following steps of respectively acquiring vibration acceleration signal sequences of M sampling periods of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of a train bogie; regarding a vibration acceleration signal sequence of a left front wheel as a state track of vibration acceleration in a three-dimensional phase space, and constructing M recurrence plots corresponding to M sampling periods of the left front wheel according to comparison of the distance between vibration acceleration vectors corresponding to any two sampling times ti and tj in the phase space and a critical distance; and according to the change characteristic values of the recurrence plots of any two adjacent sampling periods, judging the running state of the left front wheel, acquiring the running states of other wheels of the bogie by analogy, and then determining the running state of the train. According to the invention, the stability of the train is judged by constructing the recurrence plot, and more comprehensive and more accurate control over the running condition of the train is achieved.

Description

Technical field [0001] The present invention relates to the field of train safety techniques, and more particularly to a train stability assessment method and system based on recursive graph analysis. Background technique [0002] At present, the railway train is still the main means of transportation at many people, and the basic task is safe, punctual, and efficiently transport passengers. During the operation, once the train derails, the derailed train may be rushing into the opposite orbit, or even turned into the car, which is unmeasureable. In order to make more accurate judgment on the safety of train derailment, it is urgent to improve or re-establish the train dynamic derailment safety evaluation index and method to ensure the safe operation of the train. [0003] With the development and application of domestic automatic driving subway technology, the derailment detection system has become an important part of automatic driving safety operation protection. The derailmen...

AI Technical Summary

Problems solved by technology

The patent with the publication number CN112722003A discloses a train derailment risk monitoring system based on wheel lift. This invention can only detect the lift of the train wheels in the vertical direction, and it is difficult to find the lateral instability of the train. Its application scenarios are limited.

The patent with the publication number CN113343811A discloses a method for discriminating train derailment. The method uses the vibration acceleration signal of the train axle box to analyze the instability. Changes in acceleration can easily lead to misjudgment, and the application scenarios are limited

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