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Aiming at the problem of motor failure caused by complex factors interacting and interfering during the operation of pure electric mining trucks, a method based on principal component analysis (PCA) and random forest (RF) is proposed for predictive diagnosis. A dataset is constructed based on the actual collected motor failures of electric mining trucks, and the eigenvalue extraction and dimensionality reduction of the failure data are carried out using principal component analysis to reduce the dimensional redundancy of the data; the random forest prediction model is used to train and test the dimensionality-reduced data, and to predict the motor failure categories. The results show that the accuracy of motor fault type diagnosis using PCA-RF method reaches more than 97%, which is significantly improved compared with the accuracy of the method without dimensionality reduction processing. The accuracy of the above method for motor fault diagnosis of electric mining trucks is confirmed.
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针对纯电动矿山卡车作业过程中复杂因素交互干扰而引发的电机故障问题,提出了一种基于主成分分析(PCA)和随机森林(RF)的方法进行预测诊断。根据实际采集的电动矿卡电机故障构建数据集,利用PCA对故障数据进行特征值提取、降维,减少数据维度冗余;采用RF预测模型对降维后的数据进行训练测试,并对电机故障类别进行预测。结果表明:采用PCA-RF方法对电机故障类型进行诊断的准确率达到97%以上,对比未经降维处理方法的准确率明显提升。本文证实了以上方法对电动矿卡电机故障诊断的准确性。
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随机森林分类预测, figureFileSmall=i3k6Bpc89Pu0g+COGmCy2A==, figureFileBig=jJrwGo+Uo9v39mHyZoqQjg==, tableContent=null), ArticleFig(id=1207748670867481083, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=EN, label=Fig.2, caption=
Flowchart of electric mining truck motor fault classification based on random forest with optimized data dimensions, figureFileSmall=d0vMPZxd5MDK1cE+G47DnA==, figureFileBig=Xxz3KBKVWIEqdwYGhaYxjQ==, tableContent=null), ArticleFig(id=1207748670976532996, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=CN, label=图2, caption=
基于优化数据维度随机森林的电动矿卡电机故障分类流程, figureFileSmall=d0vMPZxd5MDK1cE+G47DnA==, figureFileBig=Xxz3KBKVWIEqdwYGhaYxjQ==, tableContent=null), ArticleFig(id=1207748671085584909, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=EN, label=Fig.3, caption=
Distribution of fault downgrading features, figureFileSmall=sUDe2S3yUCClpossFFWtZw==, figureFileBig=g28Q/+tatuH3o8fXqjrLEA==, tableContent=null), ArticleFig(id=1207748671182053910, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=CN, label=图3, caption=
故障降维特征分布, figureFileSmall=sUDe2S3yUCClpossFFWtZw==, figureFileBig=g28Q/+tatuH3o8fXqjrLEA==, tableContent=null), ArticleFig(id=1207748671324660257, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=EN, label=Fig.4, caption=
Decision tree versus error, figureFileSmall=JJA+prwqsKfVaqh3B3B+iw==, figureFileBig=0xdfdzHW16EEg4cAXKvRUw==, tableContent=null), ArticleFig(id=1207748671425323563, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=CN, label=图4, caption=
决策树与误差的关系, figureFileSmall=JJA+prwqsKfVaqh3B3B+iw==, figureFileBig=0xdfdzHW16EEg4cAXKvRUw==, tableContent=null), ArticleFig(id=1207748671538569778, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=EN, label=Fig.5, caption=
Predicted results of fault classification, figureFileSmall=65r/z/aYvRzMP7gMobJhdg==, figureFileBig=OxViBljxRsvZeoLV+0MCPg==, tableContent=null), ArticleFig(id=1207748672750723645, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=CN, label=图5, caption=
故障分类的预测结果, figureFileSmall=65r/z/aYvRzMP7gMobJhdg==, figureFileBig=OxViBljxRsvZeoLV+0MCPg==, tableContent=null), ArticleFig(id=1207748672851386951, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=EN, label=Fig.6, caption=
Fault classification results for random forest, figureFileSmall=j6JhbRH6e/Iu8xW0wsyYug==, figureFileBig=CkXLJPc0KYdun4xe85ytlQ==, tableContent=null), ArticleFig(id=1207748673002381909, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=CN, label=图6, caption=
随机森林的故障分类结果, figureFileSmall=j6JhbRH6e/Iu8xW0wsyYug==, figureFileBig=CkXLJPc0KYdun4xe85ytlQ==, tableContent=null), ArticleFig(id=1207748673111433826, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=EN, label=Tab.1, caption=
Principal component eigenvalues and contributions
, figureFileSmall=null, figureFileBig=null, tableContent=
| 主成分 | 初始特征值 |
|---|
| 特征值 | 贡献率/% | 累计贡献率/% |
|---|
| 1 | 3.491 1 | 29.09 | 29.09 |
| 2 | 3.204 2 | 26.70 | 55.79 |
| 3 | 2.699 2 | 22.49 | 78.29 |
| 4 | 1.325 6 | 11.05 | 89.33 |
| 5 | 0.452 5 | 3.77 | 93.11 |
| 6 | 0.306 4 | 2.55 | 95.66 |
| 7 | 0.240 3 | 2.00 | 97.66 |
| 8 | 0.136 3 | 1.14 | 98.80 |
), ArticleFig(id=1207748673233068653, tenantId=1146029695717560320, journalId=1205116883411038211, articleId=1207658086064559092, language=CN, label=表1, caption=
主成分特征值和贡献率
, figureFileSmall=null, figureFileBig=null, tableContent=
| 主成分 | 初始特征值 |
|---|
| 特征值 | 贡献率/% | 累计贡献率/% |
|---|
| 1 | 3.491 1 | 29.09 | 29.09 |
| 2 | 3.204 2 | 26.70 | 55.79 |
| 3 | 2.699 2 | 22.49 | 78.29 |
| 4 | 1.325 6 | 11.05 | 89.33 |
| 5 | 0.452 5 | 3.77 | 93.11 |
| 6 | 0.306 4 | 2.55 | 95.66 |
| 7 | 0.240 3 | 2.00 | 97.66 |
| 8 | 0.136 3 | 1.14 | 98.80 |
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