|Table of Contents|

Comparison method of energy transfer characteristics for fault detection of vehicle suspension spring(PDF)

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

Issue:
2013年04期
Page:
51-
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Comparison method of energy transfer characteristics for fault detection of vehicle suspension spring
Author(s):
DING Jian-ming;  LIN Jian-hui;  ZHAO Jie;  HUANG Chen-guang
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
Keywords:
vehicle engineering;  suspension spring;  spring fault;  harmonic wavelet packet decomposition;  scale energy transfer characteristics;  dynamic detection
PACS:
U279.3
DOI:
-
Abstract:
The frequency shift characteristics of suspension transfer function under different spring stiffnesses were analyzed, and a new dynamic detecting method of vehicle suspension spring fault was developed. The vertical vibration accelerations of car body and bogie at the locations installed with suspension springs were respectively decomposed by seven-layer harmonic wavelet packet, and the eight low scales energies were calculated. The suspension's scale energy transfer characteristics were got through the division of car body and frame acceleration energies in each scale. The comparison method of suspension's scale energy transfer characteristics in adjacent periods was constructed to achieve the failure detection of suspension spring. Detection result shows that suspension's energy transfer characteristic changes to high scale due to spring stiffness metamorphosis, which is consistent with the conclusion drawn from the detection mechanism analysis to low frequency change, and the method correctly detects suspension failure with 10% stiffness metamorphosis. Therefor, the method has high reliability and good engineering applicability. 9 figs, 14 refs.

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Last Update: 2013-08-30