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Method for determining snakelike instability of rail vehicle

A determination method and technology for rail vehicles, which are applied in railway vehicles, vehicle components, motor vehicles, etc., can solve problems such as serpentine instability, and achieve the effect of solving unreliability.

Active Publication Date: 2016-08-24
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to solve the technical problem of how to determine the serpentine instability and provide a method for determining the serpentine instability of rail vehicles

Method used

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  • Method for determining snakelike instability of rail vehicle
  • Method for determining snakelike instability of rail vehicle
  • Method for determining snakelike instability of rail vehicle

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0035] The method for judging the serpentine instability of a rail vehicle according to the present invention is mainly used in a rail vehicle serpentine instability suppression system, and is used as a method for judging whether the rail vehicle is in a serpentine instability.

[0036] The rail vehicle serpentine instability suppression system includes a serpentine early warning and control module and a traction motor speed control system, and the signal output end of the serpentine early warning and control module is connected to the traction motor speed control system. The serpentine early warning and control module is used to judge whether the bogie is in a serpentine instability state, and the traction motor speed control system is used to control the speed of the traction motor according to the judgment of the serpentine early warning and c...

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Abstract

A method for determining snakelike instability of a rail vehicle includes noise-assisted ensemble empirical mode decomposition (EEMD), instantaneous frequency (and amplitude ), generalized zero-crossing (GZC) frequency (and amplitude ), and non-linear index calculating methods. If snakelike instability occurs to a train, the non-linear index of the train is enhanced, so that early warning can be given for possible instability. The invention provides a novel method for determining snakelike instability. The method includes calculating instantaneous frequency, instantaneous amplitude, zero-crossing average frequency (amplitude) and non-linear index, and determining the snakelike instability according to the non-linear index. The defect of unreliable determination of a conventional determining method is solved.

Description

technical field [0001] The invention relates to a judging method, in particular to a judging method for a rail vehicle serpentine instability. Background technique [0002] Train safety is the primary consideration for train operation, so domestic and foreign manufacturers have designed different monitoring systems and equipment to monitor the train operating status. These detection systems and equipment widely use accelerometers and strain gauges to monitor key parts, including the monitoring of train safety indicators and stability indicators. However, at present, there is no national standard for judging train serpentine instability in China. Usually, such a processing method is adopted: carry out 0.5-10 Hz band-pass filtering on the lateral vibration acceleration of the train bogie. -10m / s^2, it is considered that the train is laterally unstable (serpentine instability). However, this method has a large filtering range, and the filtered signal may have signals other th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00B60L15/20
CPCB60L15/20B60L2200/26B60L2240/421G01H17/00Y02T10/72
Inventor 陈双喜虞大联邓小军刘韶庆李海涛曲文强
Owner CRRC QINGDAO SIFANG CO LTD