• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2026, Vol. 62 ›› Issue (16): 406-418.doi: 10.3901/JME.260727

• 特邀专辑:轨道运载装备动态设计理论与运维技术 • 上一篇    

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基于多源加权频谱重构模型的轴承故障诊断方法

胡忠硕1,2,3, 杨建伟1,3, 姚德臣1,3, 王金海1,3, 霍纪元1,3, 孙润韬1,2,3, 任宇腾1,3   

  1. 1. 北京建筑大学机电与车辆工程学院 北京 100044;
    2. 北京交通大学机械与电子控制工程学院 北京 100044;
    3. 北京建筑大学城市轨道交通车辆服役性能保障北京市重点实验室 北京 100044
  • 收稿日期:2025-08-14 修回日期:2026-03-03 发布日期:2026-10-14
  • 作者简介:胡忠硕,男,1996年出生,博士研究生。主要研究方向为旋转机械故障诊断。E-mail:huzhongshuo@163.com;杨建伟(通信作者),男,1971年出生,博士,教授,博士研究生导师。主要研究方向为城轨车辆系统动力学、振动噪声分析与控制、旋转机械故障诊断。E-mail:yangjianwei@bucea.edu.cn
  • 基金资助:
    国家自然科学基金(52272385、52205083)和北京市自然科学基金(L241033)资助项目。

Bearing Fault Diagnosis Method Based on Multi-source Weighted Spectrum Reconstruction Model

HU Zhongshuo1,2,3, YANG Jianwei1,3, YAO Dechen1,3, WANG Jinhai1,3, HUO Jiyuan1,3, SUN Runtao1,2,3, REN Yuteng1,3   

  1. 1. School of Mechanical-electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044;
    2. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044;
    3. Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles, Beijing University of Civil Engineering and Architecture, Beijing 100044
  • Received:2025-08-14 Revised:2026-03-03 Published:2026-10-14

摘要: 滚动轴承是城市轨道列车的关键部件,其健康监测对运营安全具有重大工程意义。然而,单一测点信号易受轮轨冲击、系统部件振动等噪声影响。针对上述问题,提出多源加权频谱重构(Multi-source weighted spectrum reconstruction,MWSR)模型。首先,对计算分析多测点信息的加权熵谱子带能量分布,动态调整子带边界使其接近预设目标的能量分布;其次,构建基于自回归滑动平均(Auto-regressive moving average model,ARMA)模型的多测点间频带耦合关系,迭代各测点信息的子带边界;最后设计基于子带边界的滤波器组,对多测点信号进行融合重构,实现轴承故障特征的增强。通过包络谱实现对轴承的故障诊断。与传统信号分解方法相比,所提方法在不同信噪比下故障特征能量比(Fault characteristic energy ratio,FCER)均保持最高水平,故障特征更具可辨识性,能够为故障诊断提供高辨识度的故障特征。

关键词: 多源信息融合, 故障诊断, 自回归滑动平均模型, 加权谱熵

Abstract: Rolling bearings are critical components of urban rail trains, and their health monitoring holds significant engineering importance for operational safety. However, signals from a single measurement point are susceptible to noise interference such as wheel-rail impacts and vibrations from system components. Therefore, this paper proposes a multi-source weighted spectrum reconstruction(MWSR) model. First, the sub-band energy distribution of the weighted entropy spectrum from multi-point measurement information is calculated and analyzed to dynamically adjust the sub-band boundaries, making them approximate the energy distribution of a preset target. Second, a frequency-band coupling relationship between multiple measurement points is constructed based on an ARMA model, iteratively refining the sub-band boundaries for each measurement point’s information. Finally, a filter bank based on the optimized sub-band boundaries is designed to fuse and reconstruct signals from multiple measurement points, thereby enhancing bearing fault features. Fault diagnosis is achieved through envelope spectrum analysis. Compared to traditional signal decomposition methods, the proposed method maintains the highest fault characteristic energy ratio(FCER) across varying signal-to-noise ratios(SNRs), resulting in more identifiable fault characteristics that provide highly distinguishable features for fault diagnosis.

Key words: multi-source information fusion, fault diagnosis, autoregressive moving average model, weighted spectral entropy

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