A method for detecting and evaluating the stability of rail vehicle snaking motion

A motion stability, rail vehicle technology, applied in the direction of railway vehicle testing, etc., can solve the problems such as the need to improve the discrimination sensitivity, the loss of signal energy, and the inaccurate peak value, etc., to improve the discrimination sensitivity, improve the accuracy, and reduce the false peak value. effect of possibility

Active Publication Date: 2022-04-08
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • A method for detecting and evaluating the stability of rail vehicle snaking motion
  • A method for detecting and evaluating the stability of rail vehicle snaking motion
  • A method for detecting and evaluating the stability of rail vehicle snaking motion

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Embodiment Construction

[0031] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, a method for detecting and evaluating the stability of rail vehicle snaking motion of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0032]

[0033] In order to illustrate a method for detecting and evaluating the stability of rail vehicle snaking motion of the present invention, this embodiment is specifically demonstrated on the basis of a certain model of high-speed vehicle dynamics model in China. The vehicle dynamics simulation software Simpack is established.

[0034] In this embodiment, by adjusting the parameters of the secondary anti-snaking damper, the vehicle is in a snaking instability state at a speed of 300 km / h.

[0035] figure 1 It is a flow chart of a method for detecting and evaluating the stability of meandering motion of a rail vehicle according to an embod...

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Abstract

The present invention provides a method for detecting and evaluating the stability of the snaking motion of a rail vehicle. Aiming at the problems of large energy loss and inaccurate peak extraction due to the narrow filter frequency band in the existing snaking motion detection method, the present invention is based on the snaking motion The high-order odd harmonic frequency characteristic filters the sampling signal to obtain a broadband filtered signal; and within the predetermined frequency identification range, conducts snake main frequency identification on the filtered signal to obtain the snake main frequency; then, filters the filtered signal again to obtain the snake main frequency signal; then extract the first peak sequence and its corresponding time series by performing continuous peak extraction on the main frequency signal in the time domain; use the main frequency oscillation cycle ratio rule of the main frequency to extract the continuous peak value of the filtered signal based on the time series, thereby A second peak sequence is obtained, and vehicle stability can be judged based on the second peak sequence. The method provided by the invention can improve the discrimination sensitivity and the accuracy of peak 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/08
CPCG01M17/08
Inventor 王小超陆正刚
Owner TONGJI UNIV
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