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A Judgment Method for Serpentine Instability of Rail Vehicles

A judgment method and rail vehicle technology, applied to vehicle parts, railway vehicles, motor vehicles, etc., can solve problems such as serpentine instability, and achieve unreliable results

Active Publication Date: 2019-05-21
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Judgment Method for Serpentine Instability of Rail Vehicles
  • A Judgment Method for Serpentine Instability of Rail Vehicles
  • A Judgment Method for Serpentine Instability of Rail Vehicles

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

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

[0036] The serpentine instability suppression system for rail vehicles includes a serpentine early warning and control module and a traction motor speed control system. 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 determine 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 ...

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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 method for judging snake instability of a rail vehicle. Background technique [0002] Train safety is the primary consideration for train operation. Therefore, domestic and foreign manufacturers have designed different monitoring systems and equipment to monitor train operation 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 the snake-like instability of trains. This method is usually adopted: 0.5-10Hz band-pass filtering is performed on the transverse vibration acceleration of the train bogie, if the filtered signal has 6 consecutive peaks greater than 8 -10m / s^2, the train is considered to be laterally unstable (snaking instability). However, this method has a large filtering range, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(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