|Table of Contents|

Reproduction simulation of emergency brake fault feature for subway train(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2015年05期
Page:
44-49,56
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Reproduction simulation of emergency brake fault feature for subway train
Author(s):
ZUO Jian-yong1;  HAN Fei1;  HU Wei2
1. Institute of Railway Transit, Tongji University, Shanghai 200092, China; 2. School of Mechanical Engineering,Ecole Nationale Supérieure d’Arts et Métiers, Metz 57070, Lorraine, France
Keywords:
subway train;  emergency brake;  fault feature;  fault reproduction
PACS:
U270.35
DOI:
-
Abstract:
The working principle of emergency braking loop and the characteristics of emergency pneumatic braking system for subway train were introduced. The diagnostic rules of the faults of emergency electromagnetic valve were provided based on comprehensive braking command and volume-chamber pressure of relay valve. Three kinds of fault characteristics for emergency electromagnetic valve are analyzed respectively corresponding to three kinds of cases, in which emergency brake was invalid with emergency braking command, emergency brake occurred without emergency braking command and volume-chamber pressure of relay valve was abnormal without emergency braking command. The detailed process of fault diagnosis for emergency electromagnetic valve was analyzed. The pneumatic braking system model was set up by using AMESim, three types of faults were simulated based on fault reappearance method, and the contrast test of the first type fault was conducted on the pneumatic control test bed. Test result shows that in triggering the emergency braking signal under normal condition, the volume-chamber pressure delays 1.1 s and reaches its goal. Under artificially disconnecting the signal wire of emergency electromagnetic valve and triggering the emergency braking signal, the volume-chamber pressure is zero and remains unchanged. After 2.6 s, the system alarms the faults of emergency braking electromagnetic valve. So, the braking system model can effectively represent the emergency braking fault features, the fault feature identification method is feasible based on braking command and volume-chamber pressure of relay valve, and it can be used for emergency braking fault’s on-line monitoring and service status tracking. 13 figs, 20 refs.

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Last Update: 2015-10-20