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To address the limitations of existing methods for underwater unmanned vehicle (UUV) motor fault diagnosis, which rely on manual feature extraction and do not fully leverage the potential of intelligent diagnosis, a two-stream CNN-LSTM fault diagnosis model is proposed. The model employs convolutional neural networks as feature extractor, which can learn the low frequency trend and high frequency detail features of the original signal without complex pre-processing steps, making real-time motor status monitoring possible. Afterwards, the classifier based on the long short-term memory network uses these features to explore temporal dependencies and identify motor faults. Experiments are conducted on a self-constructed UUV motor fault simulation platform, and the performance of the model is validated by setting multiple speeds and load conditions. The results show that this method can efficiently diagnose six typical states in UUV motors and achieve an average diagnostic accuracy of 97.22%. These findings demonstrate the model's effectiveness and robustness in UUV motor fault diagnosis.
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针对水下无人航行器(Unmanned Underwater Vehicle,UUV)电机故障诊断中现有方法依赖人工特征提取、智能诊断潜力无法充分发挥的问题,提出一种基于双流CNN-LSTM的故障诊断模型。该模型采用卷积神经网络作为特征提取器,无需复杂的预处理步骤,能够自动并行地学习原始信号的低频趋势与高频细节特征,从而实现实时电机状态监测。随后,基于长短期记忆网络的分类器利用提取的特征深入挖掘时序依赖关系,以识别电机故障。试验基于自主搭建的UUV电机故障模拟平台,设置了多种转速与负载工况以验证模型性能。结果表明,该方法能够高效诊断UUV电机中的六种典型状态,平均诊断准确率达到97.22%。试验证明,该模型在UUV电机故障诊断领域具有良好的有效性和鲁棒性。
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陈雪倩(2001—),女,硕士研究生,主要研究方向为智能无人系统、时序序列分析。
沈钧戈(1987—),女,博士,副教授,主要研究方向为智能无人系统、人工智能数据分析。
白俊强(1971—),男,博士,教授,主要研究方向为智能无人系统。
谭浩声(1998—),男,博士研究生,主要研究方向为智能无人系统。
黄浩然(2001—),男,硕士研究生,主要研究方向为人工智能数据分析。
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陈雪倩(2001—),女,硕士研究生,主要研究方向为智能无人系统、时序序列分析。
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陈雪倩(2001—),女,硕士研究生,主要研究方向为智能无人系统、时序序列分析。
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沈钧戈(1987—),女,博士,副教授,主要研究方向为智能无人系统、人工智能数据分析。
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沈钧戈(1987—),女,博士,副教授,主要研究方向为智能无人系统、人工智能数据分析。
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白俊强(1971—),男,博士,教授,主要研究方向为智能无人系统。
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谭浩声(1998—),男,博士研究生,主要研究方向为智能无人系统。
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黄浩然(2001—),男,硕士研究生,主要研究方向为人工智能数据分析。
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黄浩然(2001—),男,硕士研究生,主要研究方向为人工智能数据分析。
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2024,
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LSTM结构 —sigmoid函数; —输入门的输出; —遗忘门的输出; —记忆单元的输出; —输出门的输出;Ht —当前时间步的输出;Xt —当前时间步的输入。
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双流CNN-LSTM深度神经网络模型, figureFileSmall=jgXTH7R4x7RLynBRiaciXQ==, figureFileBig=fwRQ0pAZ6gTC6SgbOJ4pzA==, tableContent=null), ArticleFig(id=1190013516837912676, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1189585007975850993, language=EN, label=Fig.4, caption=
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Experiment condition setting
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| 电机工况 | 电机转速/(r·min-1) | 负载情况/N |
| WC1 | 1 000 | 0 |
| WC2 | 1 500 | 0 |
| WC3 | 2 500 | 0 |
| WC4 | 1 000 | 8.34 |
| WC5 | 1 500 | 8.34 |
| WC6 | 2 500 | 8.34 |
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试验工况设置
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| 电机工况 | 电机转速/(r·min-1) | 负载情况/N |
| WC1 | 1 000 | 0 |
| WC2 | 1 500 | 0 |
| WC3 | 2 500 | 0 |
| WC4 | 1 000 | 8.34 |
| WC5 | 1 500 | 8.34 |
| WC6 | 2 500 | 8.34 |
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Experiment fault setting
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| 部件 | 标签 | 电机状态 |
| 电机 | M0 | 转子不平衡故障 |
| M1 | 转子偏心故障 |
| M2 | 绕组匝间故障 |
| M3 | 健康状态 |
| M4 | 轴承故障 |
| M5 | 永磁体退磁故障 |
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试验故障设置
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| 部件 | 标签 | 电机状态 |
| 电机 | M0 | 转子不平衡故障 |
| M1 | 转子偏心故障 |
| M2 | 绕组匝间故障 |
| M3 | 健康状态 |
| M4 | 轴承故障 |
| M5 | 永磁体退磁故障 |
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Two-stream CNN-LSTM network parameter setting
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| 网络层 | 过滤器 | 卷积核大小 | 步幅 | 节点数 |
| Conv1d_1 | 50 | 20 | 2 | — |
| Conv1d_2 | 40 | 10 | 2 | — |
| MAXPooling1d_1 | — | 2 | 2 | — |
| Conv1d_3 | 50 | 6 | 1 | — |
| Conv1d_4 | 30 | 6 | 1 | — |
| MAXPooling1d_2 | — | 2 | 2 | — |
| Conv1d_5 | 30 | 6 | 1 | — |
| Conv1d_6 | 30 | 6 | 2 | — |
| MAXPooling1d_3 | — | 2 | 2 | — |
| LSTM_1 | — | — | — | 60 |
| LSTM_2 | — | — | — | 60 |
| Dense | — | — | — | 6 |
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双流CNN-LSTM网络参数设置
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| 网络层 | 过滤器 | 卷积核大小 | 步幅 | 节点数 |
| Conv1d_1 | 50 | 20 | 2 | — |
| Conv1d_2 | 40 | 10 | 2 | — |
| MAXPooling1d_1 | — | 2 | 2 | — |
| Conv1d_3 | 50 | 6 | 1 | — |
| Conv1d_4 | 30 | 6 | 1 | — |
| MAXPooling1d_2 | — | 2 | 2 | — |
| Conv1d_5 | 30 | 6 | 1 | — |
| Conv1d_6 | 30 | 6 | 2 | — |
| MAXPooling1d_3 | — | 2 | 2 | — |
| LSTM_1 | — | — | — | 60 |
| LSTM_2 | — | — | — | 60 |
| Dense | — | — | — | 6 |
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Motor fault diagnosis results based on dual-stream CNN-LSTM network
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| 故障标签 | 精确度 | 召回率 | F 1分数 |
| M0 | 97.46 | 99.10 | 98.28 |
| M1 | 98.78 | 99.23 | 99.01 |
| M2 | 91.95 | 98.26 | 95.02 |
| M3 | 99.87 | 98.81 | 99.34 |
| M4 | 99.21 | 94.29 | 96.69 |
| M5 | 92.34 | 99.58 | 95.83 |
| 准确率 | 97.22 | — | — |
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双流CNN-LSTM网络电机故障诊断结果 (%)
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| 故障标签 | 精确度 | 召回率 | F 1分数 |
| M0 | 97.46 | 99.10 | 98.28 |
| M1 | 98.78 | 99.23 | 99.01 |
| M2 | 91.95 | 98.26 | 95.02 |
| M3 | 99.87 | 98.81 | 99.34 |
| M4 | 99.21 | 94.29 | 96.69 |
| M5 | 92.34 | 99.58 | 95.83 |
| 准确率 | 97.22 | — | — |
), ArticleFig(id=1190013517844545648, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1189585007975850993, language=EN, label=Tab.5, caption=
Motor fault diagnosis results under different working conditions
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| 电机工况 | 电机转速/(r·min-1) | 负载情况/N | 平均精确率/% |
| WC1 | 1 000 | 0 | 96.53 |
| WC2 | 1 500 | 0 | 97.65 |
| WC3 | 2 500 | 0 | 96.96 |
| WC4 | 1 000 | 8.34 | 97.27 |
| WC5 | 1 500 | 8.34 | 98.31 |
| WC6 | 2 500 | 8.34 | 95.67 |
), ArticleFig(id=1190013517932626033, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1189585007975850993, language=CN, label=表5, caption=
不同工况下电机故障诊断结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 电机工况 | 电机转速/(r·min-1) | 负载情况/N | 平均精确率/% |
| WC1 | 1 000 | 0 | 96.53 |
| WC2 | 1 500 | 0 | 97.65 |
| WC3 | 2 500 | 0 | 96.96 |
| WC4 | 1 000 | 8.34 | 97.27 |
| WC5 | 1 500 | 8.34 | 98.31 |
| WC6 | 2 500 | 8.34 | 95.67 |
), ArticleFig(id=1190013518008123506, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1189585007975850993, language=EN, label=Tab.6, caption=
Motor fault diagnosis results under different algorithms
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | 精确度 | 召回率 | F 1分数 | 准确率 |
| CNN | 84.56 | 85.12 | 84.83 | 87.56 |
| LSTM | 82.34 | 80.36 | 81.34 | 86.81 |
| CNN-LSTM | 90.68 | 89.52 | 90.10 | 92.45 |
| Transformer | 90.12 | 88.34 | 89.21 | 91.02 |
| Two-Stream CNN-LSTM | 96.60 | 98.21 | 97.36 | 97.22 |
), ArticleFig(id=1190013518083620979, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1189585007975850993, language=CN, label=表6, caption=
不同算法电机故障诊断结果 (%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型 | 精确度 | 召回率 | F 1分数 | 准确率 |
| CNN | 84.56 | 85.12 | 84.83 | 87.56 |
| LSTM | 82.34 | 80.36 | 81.34 | 86.81 |
| CNN-LSTM | 90.68 | 89.52 | 90.10 | 92.45 |
| Transformer | 90.12 | 88.34 | 89.21 | 91.02 |
| Two-Stream CNN-LSTM | 96.60 | 98.21 | 97.36 | 97.22 |
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