基于重加权谱峭度方法的航空发动机故障诊断

doi:10.7527/S1000-6893.2021.25445

航空发动机运行安全专栏

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基于重加权谱峭度方法的航空发动机故障诊断

张忠强¹, 张新¹, 王家序¹, 刘治汶²

1. 西南交通大学机械工程学院, 成都 610031;
2. 电子科技大学自动化工程学院, 成都 611731

收稿日期:2021-03-04 修回日期:2021-03-17 出版日期:2022-09-15 发布日期:2021-05-20
通讯作者: 张新,E-mail:xylon.zhang@swjtu.edu.cn E-mail:xylon.zhang@swjtu.edu.cn
基金资助:
国家自然科学基金(52075456, 52075080)；中央高校基本科研业务费专项资金(2682021CX021)

Reweighted kurtogram for aero-engine fault diagnosis

ZHANG Zhongqiang¹, ZHANG Xin¹, WANG Jiaxu¹, LIU Zhiwen²

1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received:2021-03-04 Revised:2021-03-17 Online:2022-09-15 Published:2021-05-20
Supported by:
National Natural Science Foundation of China (52075456, 52075080); Fundamental Research Funds for the Central Universities (2682021CX021)

摘要/Abstract

摘要： 针对快速谱峭度方法在分析含强冲击干扰信号时无法选取有效滤波器参数的问题, 定义了一种新的滤波器参数选择指标——重加权峭度, 并基于此提出了重加权谱峭度方法。该方法对经“Binary-Ternary”小波包分解后的各频段信号进行等分并计算各等分频段的峭度及所占其和的权重, 然后对各峭度和权重进行重排序并对峭度进行重加权得到重加权峭度, 最后将新指标表示在中心频率和带宽平面上得到重加权峭度图, 选取滤波器参数。仿真信号分析结果显示, 在强冲击干扰下重加权谱峭度方法仍能选择有效滤波器参数, 提取到周期性故障冲击。通过在航空发动机附齿轮箱中轴承故障诊断中的应用以及与常见方法的对比分析, 进一步验证了重加权谱峭度方法的有效性与优势。

关键词: 航空发动机, 故障诊断, 重加权谱峭度, 重加权峭度, 快速谱峭度, 滤波器参数

Abstract: To address the problem that the fast Kurtogram method cannot select effective filter parameters when analyzing some real vibration signals with strong impulse interferences, a reweighted kurtogram is proposed, where a new indicator-reweighted kurtosis, is defined. Firstly, the frequency bands obtained by decomposition of the "Binary-Ternary" wavelet packet are equally split into several segments. The kurtosis of each segment and their corresponding weights in their sum are calculated. Then, the kurtosis and weights are sorted in the descending and ascending order, and the reweighted kurtosis is calculated using the reordered kurtosis and weights. Finally, the reweighted kurtogram is obtained by representing the reweighted kurtosis in the plane of central frequency and bandwidth frequency. The simulated signal analysis results show the method proposed is still effective in extracting periodic fault impulses, even when the signal contains strong impulse interferences. Application in fault diagnosis of the aero-engine and comparisons with conventional methods further verify the effectiveness and advantages of the method.

Key words: aero-engine, fault diagnosis, reweighted kurtogram, reweighted kurtosis, fast kurtogram, filter parameter

中图分类号:

V233.1

张忠强, 张新, 王家序, 刘治汶. 基于重加权谱峭度方法的航空发动机故障诊断[J]. 航空学报, 2022, 43(9): 625445-625445.

ZHANG Zhongqiang, ZHANG Xin, WANG Jiaxu, LIU Zhiwen. Reweighted kurtogram for aero-engine fault diagnosis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 625445-625445.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

基于重加权谱峭度方法的航空发动机故障诊断

Reweighted kurtogram for aero-engine fault diagnosis

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