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[1]王得龙,王伟,金路,等.重复使用火箭涡轮泵轴承故障特征提取方法优化[J].火箭推进,2024,50(01):0.[doi:10.3969/j.issn.1672-9374.2024.01.015]
　WANG Delong,WANG Wei,JIN Lu,et al.Optimization of fault feature extraction method for bearings of reusable rocket turbopumps[J].Journal of Rocket Propulsion,2024,50(01):0.[doi:10.3969/j.issn.1672-9374.2024.01.015]
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重复使用火箭涡轮泵轴承故障特征提取方法优化

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 50 期数: 2024年01期 页码: 0 栏目: 目次 出版日期: 2024-02-28
Title:
Optimization of fault feature extraction method for bearings of reusable rocket turbopumps
文章编号:
1672-9374(2024)01-0154-9
作者:
王得龙1; 王伟2; 金路2; 王俨剀1
1. 西北工业大学 动力与能源学院,陕西 西安 710129; 2. 西安航天动力研究所,陕西 西安 710100
Author(s):
WANG Delong1;  WANG Wei2;  JIN Lu2;  WANG Yankai1
1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710129, China; 2.Xi'an Institute of Aerospace Propulsion, Xi'an 710100, China
关键词:
涡轮泵;  滚动轴承;  包络谱;  奇异值分解;  故障特征提取
Keywords:
turbopump;  rolling bearing;  envelope spectrum;  singular value decomposition;  fault diagnosis
分类号:
V434.21
DOI:
10.3969/j.issn.1672-9374.2024.01.015
文献标志码:
A
摘要:
涡轮泵轴承是可重复使用火箭的关键,因此能够有效提取出轴承故障特征频率从而展开故障诊断十分重要。将奇异值分解(SVD)和包络谱解调法相结合,对火箭涡轮泵轴承展开故障特征提取。对轴承内环、外环及滚动体故障数据进行处理和分析,结果表明,针对信号中含有大量噪声的数据,相比传统的包络谱解调法,改进方法的故障特征提取效果明显提升。通过该方法提取出的3种故障低频特征频率的相对幅值相比于传统包络谱解调均有提升。同时,可以有效降低高频噪声的干扰,尤其在高频区依然可以看到比较明显的特征频率,而传统包络谱解调法的高频区基本被噪声覆盖。通过计算得出信号的信噪比均有60 dB以上的提升。
Abstract:
Turbo pump bearings are the key to reusable rockets. Therefore, it is very important to extract the bearing fault characteristic frequency effectively to carry out fault diagnosis. Singular value decomposition(SVD)and envelope spectrum demodulation are combined to extract the fault features of rocket turbopump bearings. By processing and analyzing the fault data of the bearing's inner ring, outer ring and rolling element, the results show that compared with the traditional envelope spectrum demodulation method, the improved method has significantly improved the fault feature extraction effect for the data with a lot of noise in the signal. Compared with traditional envelope spectrum demodulation, the relative amplitudes of three kinds of fault low frequency characteristic frequencies extracted by this method are improved. At the same time, it can effectively reduce the interference of high frequency noise. Especially in the high frequency region, characteristic frequency can still be seen more obviously, while the high frequency region of the traditional envelope spectrum demodulation method is basically covered by noise. Through calculation, the signal-to-noise ratio of the signal is improved by more than 60 dB.

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备注/Memo

收稿日期:2023- 10- 11 修回日期:2023- 11- 01
基金项目: 国家液体火箭发动机重点实验室基金(6142704220401, 6142704210403, 6142704220403)
作者简介:王得龙(2000—),男,硕士,研究领域为液体火箭发动机故障诊断及健康管理。

更新日期/Last Update: 1900-01-01