Recognition of Life State for Slewing Bearings Using Probabilistic Principal Component Analysis

doi:10.7652/xjtuxb201510015

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Recognition of Life State for Slewing Bearings Using Probabilistic Principal Component Analysis

更新时间：2025-07-09

- Recognition of Life State for Slewing Bearings Using Probabilistic Principal Component Analysis
- Vol. 49, Issue 10, Pages: 90-96(2015)
- 作者机构：
  
  南京工业大学机械与动力工程学院,南京,211800
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201510015
  CLC： TH17;TP277
- Online First：10 October 2015，
  
  Published：2015
- 稿件说明：
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Recognition of Life State for Slewing Bearings Using Probabilistic Principal Component Analysis[J]. 2015, 49(10): 90-96.
DOI：

Recognition of Life State for Slewing Bearings Using Probabilistic Principal Component Analysis[J]. 2015, 49(10): 90-96. DOI： 10.7652/xjtuxb201510015.

摘要

针对回转支承故障特征微弱以及难以提取的特点

提出一种基于概率主成分分析(probabilistic principal component analysis

PPCA)的多领域特征提取方法。该方法从振动信号的时域和时频域中提取出多个能够表征回转支承运行状态的特征向量

并将其组成高维特征集。采用PPCA从高维特征集中提取出最能够反映回转支承寿命状态信息的特征量

将其输入粒子群算法优化的支持向量机中进行寿命状态的识别。通过回转支承全寿命实验证明

基于PPCA的特征提取方法优于传统的主成分分析(principal component analysis

PCA)

其相应的寿命状态识别精度提高了约8%

并且多领域、多变量的特征更能全面反映回转支承的性能退化趋势。与传统的特征提取方法相比

所提方法能够更全面有效地反映复杂恶劣环境下回转支承的故障信息

因此可以用于回转支承的健康监测领域。

Abstract

A novel multi-domain feature extraction approach based on probabilistic principal component analysis(PPCA)is proposed to deal with the weak fault feature of slewing bearings. Several feature vectors are extracted to form a feature set with high dimension. Then the vectors that best reflect the slewing bearing life status are extracted from the feature set by applying PPCA. These vectors are then used as inputs of a support vector machine with particle swarm optimization to perform the life state recognition. It follows from the whole life experiment of slewing bearing that PPCA is better than the traditional PCA in reducing feature dimension

and its recognition accuracy of lifetime state increases by about 8%. A comparison with a single feature or single domain features shows that the multi-domain and multi-feature set reflects the degradation of slewing bearings more comprehensively and accurately. And a comparison with the traditional feature-extraction method shows that the proposed method reflects the fault of the slewing bearing that is running in a complex and harsh environment more effectively

thus

it can be applied in the area of slewing bearing health monitoring.

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Keywords

references

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