《计算机应用》唯一官方网站 ›› 2026, Vol. 46 ›› Issue (10): 3391-3399.DOI: 10.11772/j.issn.1001-9081.2025080937
• 前沿与综合应用 • 上一篇
王井阳1, 王浩1, 张宾2(
), 时薇3(
), 黄敏1, 张杨1
收稿日期:2025-08-15
修回日期:2025-09-01
接受日期:2025-09-01
发布日期:2026-10-21
出版日期:2026-10-10
通讯作者:
张宾,时薇
作者简介:王井阳(1971—),男,河北唐山人,教授,硕士,CCF高级会员,主要研究方向:机器学习、深度学习、人工智能基金资助:
Jingyang WANG1, Hao WANG1, Bin ZHANG2(
), Wei SHI3(
), Min HUANG1, Yang ZHANG1
Received:2025-08-15
Revised:2025-09-01
Accepted:2025-09-01
Online:2026-10-21
Published:2026-10-10
Contact:
Bin ZHANG, Wei SHI
About author:WANG Jingyang, born in 1971, M. S., professor. His research interests include machine learning, deep learning, artificial intelligence.Supported by:摘要:
为实现发电厂给水泵故障的早期预警,提出一种基于多头注意力(MHA)机制和新门控单元(NGU)的给水泵故障预警模型——MHA-NGU。MHA用于捕捉时间序列中的长距离依赖关系,通过多视角特征交互强化关键维度;本文提出的NGU是一种改进循环神经网络(RNN),将它的输出门和重置门设置为两级,避免单级门因过度依赖局部信息导致的全局依赖捕捉能力下降,并在内部嵌入T转换模块,用于进一步缓解模型梯度消失问题。以浙江省某1 030 MW火电机组的给水泵为例进行验证,实验结果表明:所提模型比门控循环单元(GRU)和次优模型MHA-GRU的决定系数(R2)分别提高4.38%和1.90%,且比GRU提前5.39 h触发预警,有效实现了给水泵的早期故障预警。
中图分类号:
王井阳, 王浩, 张宾, 时薇, 黄敏, 张杨. 基于多头注意力和新门控单元的发电厂给水泵故障预警[J]. 计算机应用, 2026, 46(10): 3391-3399.
Jingyang WANG, Hao WANG, Bin ZHANG, Wei SHI, Min HUANG, Yang ZHANG. Fault warning of feedwater pumps in power plant based on multi-head attention and new gated unit[J]. Journal of Computer Applications, 2026, 46(10): 3391-3399.
| 序号 | 测点名称 |
|---|---|
| 1 | 给水泵转速 |
| 2 | 给水泵润滑油压力 |
| 3 | 给水泵液力耦合器润滑油冷却器出口油温 |
| 4 | 给水泵推力轴承非工作面温度1 |
| 5 | 给水泵推力轴承工作面温度1 |
| 6 | 给水泵电机轴承温度1 |
| 7 | 给水泵吸入侧径向轴承温度1 |
| 8 | 给水泵吐出侧径向轴承温度1 |
| 9 | 给水泵液力耦合器推力轴承温度1 |
| 10 | 给水泵液力耦合器径向轴承温度1 |
| 11 | 给水泵吐出侧轴承Y向振动 |
| 12 | 给水泵吸入侧轴承Y向振动 |
| 13 | 给水泵电机线圈温度1 |
| 14 | 给水泵电机线圈温度2 |
| 15 | 给水泵电机线圈温度3 |
表1 测点名称
Tab. 1 Names of monitoring points
| 序号 | 测点名称 |
|---|---|
| 1 | 给水泵转速 |
| 2 | 给水泵润滑油压力 |
| 3 | 给水泵液力耦合器润滑油冷却器出口油温 |
| 4 | 给水泵推力轴承非工作面温度1 |
| 5 | 给水泵推力轴承工作面温度1 |
| 6 | 给水泵电机轴承温度1 |
| 7 | 给水泵吸入侧径向轴承温度1 |
| 8 | 给水泵吐出侧径向轴承温度1 |
| 9 | 给水泵液力耦合器推力轴承温度1 |
| 10 | 给水泵液力耦合器径向轴承温度1 |
| 11 | 给水泵吐出侧轴承Y向振动 |
| 12 | 给水泵吸入侧轴承Y向振动 |
| 13 | 给水泵电机线圈温度1 |
| 14 | 给水泵电机线圈温度2 |
| 15 | 给水泵电机线圈温度3 |
| 数据 | 测点1 | 测点2 | 测点3 | 测点4 | 时间 |
|---|---|---|---|---|---|
| 数据1 | 30.194 6 | 30.339 8 | 27.311 5 | 27.323 7 | 2024-08-15 T 00:00:00 |
| 数据2 | 30.727 9 | 30.854 2 | 27.685 1 | 27.839 9 | 2024-08-116 T 09:30:00 |
| 数据3 | 30.749 9 | 30.928 4 | 27.781 5 | 27.856 2 | 2024-08-17 T 09:30:00 |
| 数据4 | 31.387 7 | 31.459 1 | 28.511 2 | 28.614 2 | 2024-08-17 T 20:30:00 |
表2 原始数据示例
Tab. 2 Raw data samples
| 数据 | 测点1 | 测点2 | 测点3 | 测点4 | 时间 |
|---|---|---|---|---|---|
| 数据1 | 30.194 6 | 30.339 8 | 27.311 5 | 27.323 7 | 2024-08-15 T 00:00:00 |
| 数据2 | 30.727 9 | 30.854 2 | 27.685 1 | 27.839 9 | 2024-08-116 T 09:30:00 |
| 数据3 | 30.749 9 | 30.928 4 | 27.781 5 | 27.856 2 | 2024-08-17 T 09:30:00 |
| 数据4 | 31.387 7 | 31.459 1 | 28.511 2 | 28.614 2 | 2024-08-17 T 20:30:00 |
| 函数 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| tanh | 0.076 652 | 0.099 268 | 0.940 003 | 514.10 | 3.99 |
| ReLU | 0.079 530 | 0.104 205 | 0.933 887 | 510.85 | 3.98 |
表3 GRU模型使用不同激活函数的实验结果
Tab. 3 Experimental results of GRU model using different activation functions
| 函数 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| tanh | 0.076 652 | 0.099 268 | 0.940 003 | 514.10 | 3.99 |
| ReLU | 0.079 530 | 0.104 205 | 0.933 887 | 510.85 | 3.98 |
| 头数 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| 1 | 0.075 274 | 0.100 703 | 0.938 256 | 676.67 | 3.77 |
| 2 | 0.061 531 | 0.078 954 | 0.962 047 | 742.24 | 3.99 |
| 4 | 0.070 942 | 0.089 127 | 0.951 635 | 1 032.97 | 4.37 |
| 8 | 0.121 224 | 0.171 106 | 0.821 747 | 1 075.97 | 4.40 |
| 16 | 0.163 028 | 0.200 268 | 0.755 809 | 1 084.80 | 4.40 |
表4 不同头数下MHA-GRU的实验结果
Tab. 4 Experimental results of MHA-GRU with different numbers of heads
| 头数 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| 1 | 0.075 274 | 0.100 703 | 0.938 256 | 676.67 | 3.77 |
| 2 | 0.061 531 | 0.078 954 | 0.962 047 | 742.24 | 3.99 |
| 4 | 0.070 942 | 0.089 127 | 0.951 635 | 1 032.97 | 4.37 |
| 8 | 0.121 224 | 0.171 106 | 0.821 747 | 1 075.97 | 4.40 |
| 16 | 0.163 028 | 0.200 268 | 0.755 809 | 1 084.80 | 4.40 |
| 模型 | 层 | 参数 |
|---|---|---|
| RNN | RNN及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| SVR | SVR | Kernal=‘rbf’,C=4,epsilon=0.1 |
| MLP | MLP | Activation=‘tanh’,hidden_layer_sizes=(10,50),Max_iter=50 |
| BP | BP | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| LSTM | LSTM及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| BiLSTM | BiLSTM及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| GRU | GRU及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| Transformer | MHA及其他 | num_heads=2,d_model=16,Activition=‘relu’,Learning=0.001,Batch_size=128,Epoch=100 |
| NGU | NGU及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| MHA-GRU | MHA、GRU及其他 | num_heads=2,Dropout=0.1,units=16,Activition=‘tanh’,Learning=0.001,Batch_size=128,Epoch=100 |
| MHA-NGU | MHA、NGU及其他 | num_heads=2,Dropout=0.1,units=16,Activition=‘tanh’,Learning=0.001,Batch_size=128,Epoch=100 |
表5 模型参数
Tab. 5 Parameters of models
| 模型 | 层 | 参数 |
|---|---|---|
| RNN | RNN及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| SVR | SVR | Kernal=‘rbf’,C=4,epsilon=0.1 |
| MLP | MLP | Activation=‘tanh’,hidden_layer_sizes=(10,50),Max_iter=50 |
| BP | BP | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| LSTM | LSTM及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| BiLSTM | BiLSTM及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| GRU | GRU及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| Transformer | MHA及其他 | num_heads=2,d_model=16,Activition=‘relu’,Learning=0.001,Batch_size=128,Epoch=100 |
| NGU | NGU及其他 | Activition=‘tanh’,units=16,Learning=0.001,Batch_size=128,Epoch=100 |
| MHA-GRU | MHA、GRU及其他 | num_heads=2,Dropout=0.1,units=16,Activition=‘tanh’,Learning=0.001,Batch_size=128,Epoch=100 |
| MHA-NGU | MHA、NGU及其他 | num_heads=2,Dropout=0.1,units=16,Activition=‘tanh’,Learning=0.001,Batch_size=128,Epoch=100 |
| 模型 | T | 二级门 | MHA | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|---|---|---|
| GRU | 0.076 652 | 0.099 268 | 0.940 003 | 514.10 | 3.990 | |||
| √ | 0.065 912 | 0.081 185 | 0.959 871 | 578.50 | 4.100 | |||
| √ | 0.068 157 | 0.085 243 | 0.955 759 | 564.86 | 4.090 | |||
| MHA-GRU | √ | 0.060 499 | 0.078 954 | 0.962 947 | 742.24 | 4.210 | ||
| NGU | √ | √ | 0.061 531 | 0.079 178 | 0.961 830 | 641.04 | 4.177 | |
| √ | √ | 0.054 863 | 0.068 984 | 0.971 026 | 864.08 | 4.260 | ||
| √ | √ | 0.051 190 | 0.066 582 | 0.973 009 | 883.56 | 4.250 | ||
| MHA-NGU | √ | √ | √ | 0.042 466 | 0.055 546 | 0.981 215 | 976.81 | 4.360 |
表6 消融实验结果
Tab. 6 Results of ablation experiments
| 模型 | T | 二级门 | MHA | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|---|---|---|
| GRU | 0.076 652 | 0.099 268 | 0.940 003 | 514.10 | 3.990 | |||
| √ | 0.065 912 | 0.081 185 | 0.959 871 | 578.50 | 4.100 | |||
| √ | 0.068 157 | 0.085 243 | 0.955 759 | 564.86 | 4.090 | |||
| MHA-GRU | √ | 0.060 499 | 0.078 954 | 0.962 947 | 742.24 | 4.210 | ||
| NGU | √ | √ | 0.061 531 | 0.079 178 | 0.961 830 | 641.04 | 4.177 | |
| √ | √ | 0.054 863 | 0.068 984 | 0.971 026 | 864.08 | 4.260 | ||
| √ | √ | 0.051 190 | 0.066 582 | 0.973 009 | 883.56 | 4.250 | ||
| MHA-NGU | √ | √ | √ | 0.042 466 | 0.055 546 | 0.981 215 | 976.81 | 4.360 |
| 模型 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| RNN[ | 0.105 450 | 0.148 718 | 0.854 710 | 240.75 | 2.830 |
| SVR[ | 0.079 583 | 0.117 629 | 0.915 765 | 56.22 | 1.560 |
| MLP[ | 0.083 230 | 0.107 568 | 0.929 551 | 7.64 | 1.100 |
| BP[ | 0.090 561 | 0.137 183 | 0.884 883 | 141.71 | 2.650 |
| LSTM[ | 0.077 425 | 0.100 814 | 0.938 121 | 572.16 | 4.100 |
| BiLSTM[ | 0.077 728 | 0.100 439 | 0.938 384 | 974.40 | 4.350 |
| GRU[ | 0.076 652 | 0.099 268 | 0.940 003 | 514.10 | 3.990 |
| Transformer[ | 0.065 584 | 0.085 152 | 0.955 853 | 504.90 | 3.980 |
| NGU | 0.061 531 | 0.079 178 | 0.961 830 | 641.04 | 4.170 |
| MHA-GRU | 0.060 499 | 0.078 954 | 0.962 947 | 742.24 | 4.210 |
| MHA-NGU | 0.042 466 | 0.055 546 | 0.981 215 | 976.81 | 4.360 |
表7 不同模型的对比实验结果
Tab. 7 Experimental results of different models
| 模型 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| RNN[ | 0.105 450 | 0.148 718 | 0.854 710 | 240.75 | 2.830 |
| SVR[ | 0.079 583 | 0.117 629 | 0.915 765 | 56.22 | 1.560 |
| MLP[ | 0.083 230 | 0.107 568 | 0.929 551 | 7.64 | 1.100 |
| BP[ | 0.090 561 | 0.137 183 | 0.884 883 | 141.71 | 2.650 |
| LSTM[ | 0.077 425 | 0.100 814 | 0.938 121 | 572.16 | 4.100 |
| BiLSTM[ | 0.077 728 | 0.100 439 | 0.938 384 | 974.40 | 4.350 |
| GRU[ | 0.076 652 | 0.099 268 | 0.940 003 | 514.10 | 3.990 |
| Transformer[ | 0.065 584 | 0.085 152 | 0.955 853 | 504.90 | 3.980 |
| NGU | 0.061 531 | 0.079 178 | 0.961 830 | 641.04 | 4.170 |
| MHA-GRU | 0.060 499 | 0.078 954 | 0.962 947 | 742.24 | 4.210 |
| MHA-NGU | 0.042 466 | 0.055 546 | 0.981 215 | 976.81 | 4.360 |
| 模型 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| RNN[ | 0.586 583 | 0.731 093 | 0.864 310 | 395.34 | 4.12 |
| SVR[ | 0.519 365 | 0.655 411 | 0.909 871 | 77.48 | 2.33 |
| MLP[ | 0.491 486 | 0.623 163 | 0.917 490 | 10.33 | 1.55 |
| BP[ | 0.526 584 | 0.660 762 | 0.891 158 | 212.60 | 3.77 |
| LSTM[ | 0.470 136 | 0.580 445 | 0.927 408 | 798.37 | 5.14 |
| BiLSTM[ | 0.471 782 | 0.583 219 | 0.929 224 | 1 190.47 | 5.32 |
| GRU[ | 0.403 145 | 0.498 158 | 0.940 413 | 792.71 | 5.12 |
| Transformer[ | 0.329 614 | 0.414 267 | 0.958 793 | 557.42 | 5.07 |
| NGU | 0.310 211 | 0.400 215 | 0.961 032 | 887.45 | 5.19 |
| MHA-GRU | 0.301 922 | 0.399 103 | 0.961 447 | 924.69 | 5.20 |
| MHA-NGU | 0.276 413 | 0.354 267 | 0.968 720 | 1 205.67 | 5.33 |
表8 泛化实验结果
Tab. 8 Results of generalization experiments
| 模型 | MAE | RMSE | R² | 训练时长/s | 预测时长/ms |
|---|---|---|---|---|---|
| RNN[ | 0.586 583 | 0.731 093 | 0.864 310 | 395.34 | 4.12 |
| SVR[ | 0.519 365 | 0.655 411 | 0.909 871 | 77.48 | 2.33 |
| MLP[ | 0.491 486 | 0.623 163 | 0.917 490 | 10.33 | 1.55 |
| BP[ | 0.526 584 | 0.660 762 | 0.891 158 | 212.60 | 3.77 |
| LSTM[ | 0.470 136 | 0.580 445 | 0.927 408 | 798.37 | 5.14 |
| BiLSTM[ | 0.471 782 | 0.583 219 | 0.929 224 | 1 190.47 | 5.32 |
| GRU[ | 0.403 145 | 0.498 158 | 0.940 413 | 792.71 | 5.12 |
| Transformer[ | 0.329 614 | 0.414 267 | 0.958 793 | 557.42 | 5.07 |
| NGU | 0.310 211 | 0.400 215 | 0.961 032 | 887.45 | 5.19 |
| MHA-GRU | 0.301 922 | 0.399 103 | 0.961 447 | 924.69 | 5.20 |
| MHA-NGU | 0.276 413 | 0.354 267 | 0.968 720 | 1 205.67 | 5.33 |
| 模型 | 上控制限 | 下控制限 |
|---|---|---|
| GRU | 0.162 955 | -0.197 441 |
| MHA-GRU | 0.191 028 | -0.128 010 |
| NGU | 0.137 838 | -0.158 168 |
| MHA-NGU | 0.112 823 | -0.160 504 |
表9 预警控制限
Tab. 9 Warning control limits
| 模型 | 上控制限 | 下控制限 |
|---|---|---|
| GRU | 0.162 955 | -0.197 441 |
| MHA-GRU | 0.191 028 | -0.128 010 |
| NGU | 0.137 838 | -0.158 168 |
| MHA-NGU | 0.112 823 | -0.160 504 |
| 状态等级 | 健康指数I/% |
|---|---|
| 优秀 | (90,100] |
| 良好 | (80,90] |
| 警告 | (60,80] |
| 恶化 | (40,60] |
| 严重恶化 | (0,40] |
表10 给水泵状态和健康指数间的对应关系
Tab. 10 Correlation between feedwater pump status and health indicator
| 状态等级 | 健康指数I/% |
|---|---|
| 优秀 | (90,100] |
| 良好 | (80,90] |
| 警告 | (60,80] |
| 恶化 | (40,60] |
| 严重恶化 | (0,40] |
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