Article(id=1149779601754386762, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1149779599254581563, articleNumber=null, orderNo=null, doi=10.19562/j.chinasae.qcgc.2025.02.009, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1723564800000, receivedDateStr=2024-08-14, revisedDate=1729008000000, revisedDateStr=2024-10-16, acceptedDate=null, acceptedDateStr=null, onlineDate=1752058418929, onlineDateStr=2025-07-09, pubDate=1740412800000, pubDateStr=2025-02-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1752058418929, onlineIssueDateStr=2025-07-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1752058418929, creator=13701087609, updateTime=1752058418929, updator=13701087609, issue=Issue{id=1149779599254581563, tenantId=1146029695717560320, journalId=1146120084050784272, year='2025', volume='47', issue='2', pageStart='201', pageEnd='390', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1752058418334, creator=13701087609, updateTime=1753780722751, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1157003467609956875, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1149779599254581563, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1157003467609956876, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1149779599254581563, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=292, endPage=300, ext={EN=ArticleExt(id=1149779601938936140, articleId=1149779601754386762, tenantId=1146029695717560320, journalId=1146120084050784272, language=EN, title=Enhanced Two-Stream Transformer Model for Remaining Useful Life Prediction of Diesel Engines, columnId=null, journalTitle=Automotive Engineering, columnName=null, runingTitle=null, highlight=
Transformer-based models have made significant progress in Remaining Useful Life (RUL) prediction. However,existing Transformer models have the following limitation of difficulty in local feature extraction and failure to consider the importance of varying temporal and spatial input features. To solve the problems,in this paper,an enhanced two-stream Transformer model is proposed,which is reinforced by the local feature extraction module and the interaction fusion module. Firstly,the local feature extraction module captures local features from both the temporal and spatial streams to compensate for the Transformer's deficiency in local feature extraction. Then,the two-stream Transformer is used to extract long-term dependencies in the temporal and spatial dimensions,enhancing complementary learning between the two streams. Finally,the interaction fusion module is constructed to capture stream-level interaction using bilinear fusion,further improving prediction performance. Experiments using multiple models on two real-world datasets from a diesel engine manufacturer demonstrate that the evaluation metrics RMSE and Score are reduced by at least 3.23% and 5.89%,respectively.
, articleAbstract=
Transformer-based models have made significant progress in Remaining Useful Life (RUL) prediction. However, existing Transformer models have the following limitation of difficulty in local feature extraction and failure to consider the importance of varying temporal and spatial input features. To solve the problems, in this paper, an enhanced two-stream Transformer model is proposed, which is reinforced by the local feature extraction module and the interaction fusion module. Firstly, the local feature extraction module captures local features from both the temporal and spatial streams to compensate for the Transformer's deficiency in local feature extraction. Then, the two-stream Transformer is used to extract long-term dependencies in the temporal and spatial dimensions, enhancing complementary learning between the two streams. Finally, the interaction fusion module is constructed to capture stream-level interaction using bilinear fusion, further improving prediction performance. Experiments using multiple models on two real-world datasets from a diesel engine manufacturer demonstrate that the evaluation metrics RMSE and Score are reduced by at least 3.23% and 5.89%, respectively.
, correspAuthors=Ying Yang, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Xi Zhang, Ying Yang, Chaojun Chen, Chunfeng Wang, Lei Yang), CN=ArticleExt(id=1149779618858758831, articleId=1149779601754386762, tenantId=1146029695717560320, journalId=1146120084050784272, language=CN, title=增强双流Transformer的柴油发动机剩余寿命预测模型
*, columnId=null, journalTitle=汽车工程, columnName=null, runingTitle=null, highlight=
基于Transformer的模型在剩余使用寿命(remaining useful life,RUL)预测方面取得了显著的进展。然而,现有Transformer模型主要存在以下不足:模型在提取局部特征方面有所欠缺,且没有同时考虑输入特征的不同时间和不同空间的重要性。针对以上问题,提出一种增强的双流Transformer模型,通过局部特征提取模块和交互融合模块对模型进行增强。首先,通过局部特征提取模块分别在时间流和空间流提取局部特征,以弥补Transformer在局部特征提取方面的不足。然后,使用双流Transformer分别在时间和空间维度提取长期依赖,增强双流分支的互补学习。最后,构建交互融合模块,通过双线性融合方法捕获流级交互,进一步提升预测效果。使用多个模型在某柴油发动机制造商两个真实的数据集上进行实验,其结果表明评价指标RMSE和Score至少分别降低3.23%和5.89%。
, articleAbstract=
基于Transformer的模型在剩余使用寿命(remaining useful life, RUL)预测方面取得了显著的进展。然而,现有Transformer模型主要存在以下不足:模型在提取局部特征方面有所欠缺,且没有同时考虑输入特征的不同时间和不同空间的重要性。针对以上问题,提出一种增强的双流Transformer模型,通过局部特征提取模块和交互融合模块对模型进行增强。首先,通过局部特征提取模块分别在时间流和空间流提取局部特征,以弥补Transformer在局部特征提取方面的不足。然后,使用双流Transformer分别在时间和空间维度提取长期依赖,增强双流分支的互补学习。最后,构建交互融合模块,通过双线性融合方法捕获流级交互,进一步提升预测效果。使用多个模型在某柴油发动机制造商两个真实的数据集上进行实验,其结果表明评价指标RMSE和Score至少分别降低3.23%和5.89%。
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| 数据集 | YCS07-A | YCS07-B |
| 训练发动机数量 | 100 | 100 |
| 测试发动机数量 | 100 | 100 |
| 故障模式 | 1 | 1 |
), ArticleFig(id=1170299397284831672, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149779601754386762, language=CN, label=表 1, caption=
数据集统计
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| 数据集 | YCS07-A | YCS07-B |
| 训练发动机数量 | 100 | 100 |
| 测试发动机数量 | 100 | 100 |
| 故障模式 | 1 | 1 |
), ArticleFig(id=1170299397372912057, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149779601754386762, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 传感器编号 | 参数名称 | 单位 |
| 1 | 功率 | kW |
| 2 | 油耗率 | g/(kW·h) |
| 3 | 进气温度 | ℃ |
| 4 | 排气温度 | ℃ |
| 5 | 进水温度 | ℃ |
| 6 | 排水温度 | ℃ |
| 7 | 机油温度 | ℃ |
| 8 | 燃油温度 | ℃ |
| 9 | 转速 | r/min |
| 10 | 转矩 | N·m |
| 11 | 活塞漏气量 | L/min |
| 12 | 机油压力 | kPa |
), ArticleFig(id=1170299397431632314, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149779601754386762, language=CN, label=表 2, caption=
柴油发动机监测信号参数
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| 传感器编号 | 参数名称 | 单位 |
| 1 | 功率 | kW |
| 2 | 油耗率 | g/(kW·h) |
| 3 | 进气温度 | ℃ |
| 4 | 排气温度 | ℃ |
| 5 | 进水温度 | ℃ |
| 6 | 排水温度 | ℃ |
| 7 | 机油温度 | ℃ |
| 8 | 燃油温度 | ℃ |
| 9 | 转速 | r/min |
| 10 | 转矩 | N·m |
| 11 | 活塞漏气量 | L/min |
| 12 | 机油压力 | kPa |
), ArticleFig(id=1170299397519712699, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149779601754386762, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 数据集 | 时间窗口大小 | 训练样本数量 | 测试样本数量 |
| YCS07-A | 40 | 18 374 | 8 741 |
| YCS07-B | 40 | 18 967 | 8 701 |
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两个数据集的训练样本和测试样本数
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| 数据集 | 时间窗口大小 | 训练样本数量 | 测试样本数量 |
| YCS07-A | 40 | 18 374 | 8 741 |
| YCS07-B | 40 | 18 967 | 8 701 |
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| 超参数 | 数值 |
| YCS07-A滑动窗口大小 | 40 |
| YCS07-B滑动窗口大小 | 40 |
| 优化器 | Adam |
| 批量大小 | 128 |
| 学习率 | 0.001 |
| 迭代次数 | 100 |
| 丢弃率 | 0.2 |
| 多尺度一维卷积核大小 | [3,5,7] |
| Transformer编码器块数 | 2 |
| Transformer编码器注意力头数 | 3 |
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FIT模型的超参数
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| 超参数 | 数值 |
| YCS07-A滑动窗口大小 | 40 |
| YCS07-B滑动窗口大小 | 40 |
| 优化器 | Adam |
| 批量大小 | 128 |
| 学习率 | 0.001 |
| 迭代次数 | 100 |
| 丢弃率 | 0.2 |
| 多尺度一维卷积核大小 | [3,5,7] |
| Transformer编码器块数 | 2 |
| Transformer编码器注意力头数 | 3 |
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| 类别 | 方法 | YCS07-A | YCS07-B |
| RMSE | Score | RMSE | Score |
| 基线方法 | CNN | 23.71 | 1126.39 | 28.28 | 1630.49 |
| RNN | 18.51 | 414.69 | 17.47 | 371.74 |
| Transformer | 13.56 | 198.09 | 14.2 | 225.44 |
| 基于CNN/RNN变体的方法 | DA-LSTM | 12.61 | 183.49 | 13.87 | 207.94 |
| Res-HAS | 12.63 | 176.96 | 13.45 | 197.48 |
| 基于双流网络的方法 | DCFA | 12.31 | 171.92 | 13.66 | 199.16 |
| DAST | 11.77 | 166.76 | 13.59 | 207.27 |
| 基于Transformer的改进方法 | AT | 11.65 | 150.45 | 12.59 | 176.52 |
| CNN-Transformer | 11.31 | 144.51 | 12.28 | 174.37 |
| BGT | 11.24 | 144.33 | 12.06 | 165.16 |
| 本文模型 | FIT | 10.32 | 129.27 | 11.67 | 155.43 |
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与其他模型对比
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| 类别 | 方法 | YCS07-A | YCS07-B |
| RMSE | Score | RMSE | Score |
| 基线方法 | CNN | 23.71 | 1126.39 | 28.28 | 1630.49 |
| RNN | 18.51 | 414.69 | 17.47 | 371.74 |
| Transformer | 13.56 | 198.09 | 14.2 | 225.44 |
| 基于CNN/RNN变体的方法 | DA-LSTM | 12.61 | 183.49 | 13.87 | 207.94 |
| Res-HAS | 12.63 | 176.96 | 13.45 | 197.48 |
| 基于双流网络的方法 | DCFA | 12.31 | 171.92 | 13.66 | 199.16 |
| DAST | 11.77 | 166.76 | 13.59 | 207.27 |
| 基于Transformer的改进方法 | AT | 11.65 | 150.45 | 12.59 | 176.52 |
| CNN-Transformer | 11.31 | 144.51 | 12.28 | 174.37 |
| BGT | 11.24 | 144.33 | 12.06 | 165.16 |
| 本文模型 | FIT | 10.32 | 129.27 | 11.67 | 155.43 |
), ArticleFig(id=1170299398429876673, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1149779601754386762, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 | YCS07-A | YCS07-B |
| RMSE | Score | RMSE | Score |
| DualTransformer | 12.11 | 158.24 | 13.88 | 217.31 |
| IT | 11.55 | 150.03 | 13.18 | 191.02 |
| FIT-Sum | 10.75 | 135.28 | 12.79 | 188.49 |
| FIT-Concat | 10.66 | 134.22 | 12.55 | 169.82 |
| FIT-Hadamard | 10.58 | 131.41 | 12.44 | 184.22 |
| FIT | 10.32 | 129.27 | 11.67 | 155.43 |
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消融实验结果
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| 方法 | YCS07-A | YCS07-B |
| RMSE | Score | RMSE | Score |
| DualTransformer | 12.11 | 158.24 | 13.88 | 217.31 |
| IT | 11.55 | 150.03 | 13.18 | 191.02 |
| FIT-Sum | 10.75 | 135.28 | 12.79 | 188.49 |
| FIT-Concat | 10.66 | 134.22 | 12.55 | 169.82 |
| FIT-Hadamard | 10.58 | 131.41 | 12.44 | 184.22 |
| FIT | 10.32 | 129.27 | 11.67 | 155.43 |
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| 方法 | FLOPs/ ×106 | 参数量/ ×106 | 训练时间/ min | 模型大小/ MB |
| DAST | 7.09 | 0.374 | 4.7 | 1.58 |
| AT | 7.24 | 0.415 | 5.4 | 1.79 |
| CNN-Transformer | 7.28 | 0.397 | 4.9 | 1.63 |
| BGT | 7.42 | 0.402 | 5.6 | 1.66 |
| FIT | 7.17 | 0.387 | 4.8 | 1.61 |
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计算复杂度对比结果
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| 方法 | FLOPs/ ×106 | 参数量/ ×106 | 训练时间/ min | 模型大小/ MB |
| DAST | 7.09 | 0.374 | 4.7 | 1.58 |
| AT | 7.24 | 0.415 | 5.4 | 1.79 |
| CNN-Transformer | 7.28 | 0.397 | 4.9 | 1.63 |
| BGT | 7.42 | 0.402 | 5.6 | 1.66 |
| FIT | 7.17 | 0.387 | 4.8 | 1.61 |
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