Railway vehicle snaking motion stability detection and evaluation method

Abstract

The invention provides a rail vehicle snaking motion stability detection and evaluation method, and aims to solve the problems of relatively large energy loss and inaccurate peak value extraction caused by relatively narrow filtering frequency band in an existing snaking motion detection method. The method comprises the following steps: filtering a sampling signal based on a high-order odd harmonic frequency characteristic of snaking motion to obtain a broadband filtering signal; carrying out snaking main frequency identification on the filtered signal in a preset frequency identification range to obtain a snaking main frequency; then, filtering the filtered signal again to obtain a snaking dominant frequency signal; carrying out continuous peak value extraction on the snaking main frequency signal in a time domain to obtain a first peak value sequence and a corresponding time sequence; and performing continuous peak value extraction on the filtered signal based on the time sequence by using a snaking dominant frequency oscillation period proportion rule so as to obtain a second peak value sequence, and judging the stability of the vehicle based on the second peak value sequence. The method provided by the invention can improve the discrimination sensitivity and the accuracy of peak value extraction.

Description

technical field [0001] The invention belongs to the field of monitoring the running safety state of a running part of a rail vehicle, and in particular relates to a method for detecting and evaluating the stability of the snaking motion of a rail vehicle. Background technique [0002] The wheel-set meandering motion is one of the inherent characteristics of rail vehicles. The fundamental reason for its formation is determined by the geometric characteristics of the rail vehicle wheel-rail contact, and the wheel-set meandering motion of rail vehicles cannot be fundamentally eliminated. When the running speed of the vehicle exceeds the critical speed of snaking motion, the lateral and oscillating motion of the bogie and the vehicle will develop into an unstable state with gradually expanding amplitude, which will bring great safety risks to the vehicle operation. Therefore, monitoring the bogie snaking state is of great significance to ensure and improve the safety of vehicle ...

AI Technical Summary

Problems solved by technology

[0008] In summary, due to the large energy loss of the filtered signal, or the inaccurate peak value extracted, the sensitivity of the discrimination of the stability of the rail vehicle snaking motion needs to be improved.

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