Article(id=1243880299826885200, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243880295267676686, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1007-7294.2024.11.003, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716307200000, receivedDateStr=2024-05-22, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774493773657, onlineDateStr=2026-03-26, pubDate=1732032000000, pubDateStr=2024-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774493773657, onlineIssueDateStr=2026-03-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774493773657, creator=13701087609, updateTime=1774493773657, updator=13701087609, issue=Issue{id=1243880295267676686, tenantId=1146029695717560320, journalId=1240685776644648972, year='2024', volume='28', issue='11', pageStart='1633', pageEnd='1802', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774493772569, creator=13701087609, updateTime=1774494101943, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243881676808499395, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243880295267676686, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243881676808499396, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243880295267676686, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1654, endPage=1665, ext={EN=ArticleExt(id=1243880300158235223, articleId=1243880299826885200, tenantId=1146029695717560320, journalId=1240685776644648972, language=EN, title=A federated generalization prediction method for non-stationary ship roll motion, columnId=1241023037940748650, journalTitle=Journal of Ship Mechanics, columnName=Hydrodynamics, runingTitle=null, highlight=null, articleAbstract=
Ships are susceptible to wind and waves causing the declines of installation accuracy and maintenance safety of offshore wind turbines. The most seriously affected case is the non-stationary ship roll motion under long-peaked random wave spectrum. To ensure the stability of offshore operations under complex sea conditions, it is necessary to improve the generalization of the prediction model. In this paper, a preferential feature federation method was proposed. Firstly, the non-stationary ship roll motion was decomposed into multi-component stationary sequences by using the variable modal decomposition method. Then, the long and short-term memory neural network with attention mechanism was used to build a local multi-dimensional multi-step prediction model with error correction. Finally, in order to improve the prediction effect of new type ship motions in complex sea conditions, a federation method was used to combine some ship motion data holders for best model parameters, which were selected with the maximum mean discrepancy method with high similarity for preferential feature federated training. The experimental results show that the federated model has higher prediction accuracy and better generalization ability, which can help the stability control of wave compensation during offshore wind turbines installation.
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船舶易受到风浪干扰而影响海上风力发电机的安装精度和维护安全性,其中长峰波随机波浪谱下的非平稳横摇运动影响最大。为保证海上作业在复杂海况下的稳定性,需要提高预测模型的泛化性,故本文提出基于联邦泛化的非平稳船舶横摇运动预测方法。首先,利用变模态方法分解非平稳船舶横摇运动为多分量平稳序列,进而采用注意力机制的长短期记忆神经网络建立本地多维多步预测模型,并进行误差校正;其次,为了提高复杂海况下遇到新类型船舶横摇运动时的预测效果,在不共享数据的前提下联合多家船舶横摇运动数据持有方进行择优联邦建模;最后,使用最大均值差异方法选择特征相似度高的数据进行加权平均联邦训练。实验结果表明,经过联邦学习后的模型具有更高的预测精度,以及更好的泛化能力,有助于风电安装时的波浪补偿稳定控制。
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Multi-dimensional and multi-step model of VMD-AM-LSTM-EC, figureFileSmall=5niomeE5zELLXco+fHKN6w==, figureFileBig=DpEikieYJVcT0QpNLUgBXA==, tableContent=null), ArticleFig(id=1243880316801233222, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图1, caption=
VMD-AM-LSTM-EC的多维多步模型图, figureFileSmall=5niomeE5zELLXco+fHKN6w==, figureFileBig=DpEikieYJVcT0QpNLUgBXA==, tableContent=null), ArticleFig(id=1243880317023531338, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.2, caption=
Federated learning steps with optimization process, figureFileSmall=uex3CTWRlzt5daDDJl4TNg==, figureFileBig=g8RhDqR5c3JwFBTh2asvNA==, tableContent=null), ArticleFig(id=1243880317136777548, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图2, caption=
添加择优步骤的联邦学习步骤, figureFileSmall=uex3CTWRlzt5daDDJl4TNg==, figureFileBig=g8RhDqR5c3JwFBTh2asvNA==, tableContent=null), ArticleFig(id=1243880317250023758, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.3, caption=
Schematic diagram of segmented feature federation based on MMD, figureFileSmall=pNiKq37Ronjno3X99gEXiQ==, figureFileBig=wbueKsMr7ien4Sh1EFvF7A==, tableContent=null), ArticleFig(id=1243880317359075664, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图3, caption=
基于MMD的分段特征联邦示意图, figureFileSmall=pNiKq37Ronjno3X99gEXiQ==, figureFileBig=wbueKsMr7ien4Sh1EFvF7A==, tableContent=null), ArticleFig(id=1243880317463933265, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.4, caption=
Data chart of ship rolling motion with long peak wave random wave spectrum under Class 4 sea state, figureFileSmall=p3lZgITNN0Gdcrhh5qmPIg==, figureFileBig=O8Oe+lgzIrndqdomyjbE0w==, tableContent=null), ArticleFig(id=1243880317572985170, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图4, caption=
四级海况下长峰波随机海浪谱船舶横摇运动数据图, figureFileSmall=p3lZgITNN0Gdcrhh5qmPIg==, figureFileBig=O8Oe+lgzIrndqdomyjbE0w==, tableContent=null), ArticleFig(id=1243880317661065555, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.5, caption=
Multi-dimensional and multi-step model prediction diagram of VMD-AM-LSTM-EC, figureFileSmall=Kl7g3XCK5jcOZ1DBQLBQdg==, figureFileBig=Cs1uURTQ2XqEHGdJhGbtpQ==, tableContent=null), ArticleFig(id=1243880317736563028, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图5, caption=
VMD-AM-LSTM-EC的多维多步模型预测图, figureFileSmall=Kl7g3XCK5jcOZ1DBQLBQdg==, figureFileBig=Cs1uURTQ2XqEHGdJhGbtpQ==, tableContent=null), ArticleFig(id=1243880317828837717, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.6, caption=
Error comparison of different models, figureFileSmall=MAsfKHm1EtcyTx2pRgNiaw==, figureFileBig=PgoR5WiY8/07whbu2OqAWQ==, tableContent=null), ArticleFig(id=1243880317916918102, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图6, caption=
不同模型误差对比图, figureFileSmall=MAsfKHm1EtcyTx2pRgNiaw==, figureFileBig=PgoR5WiY8/07whbu2OqAWQ==, tableContent=null), ArticleFig(id=1243880318021775703, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.7, caption=
Data chart of multi-wave direction angle change under Level 4 sea state, figureFileSmall=TWNTiRehmb/nuYPktboVyQ==, figureFileBig=SK+RkXfqVJFrvoniqryNQw==, tableContent=null), ArticleFig(id=1243880318101467480, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图7, caption=
四级海况下多浪向角变化的数据图, figureFileSmall=TWNTiRehmb/nuYPktboVyQ==, figureFileBig=SK+RkXfqVJFrvoniqryNQw==, tableContent=null), ArticleFig(id=1243880318181159257, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.8, caption=
Local data of Clients A and B, figureFileSmall=Z0nbR5zxEQ2SBcqEk6sX1g==, figureFileBig=9bOGN1pH4JyZN7oLmWsFQg==, tableContent=null), ArticleFig(id=1243880318290211162, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图8, caption=
客户端A和B的本地数据, figureFileSmall=Z0nbR5zxEQ2SBcqEk6sX1g==, figureFileBig=9bOGN1pH4JyZN7oLmWsFQg==, tableContent=null), ArticleFig(id=1243880318378291547, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.9, caption=
Comparison of results after adding the optimization step, figureFileSmall=q2rJrFg1ArKKcIjYWNBmlw==, figureFileBig=JcR70G+zy+5rLpJHw98yxg==, tableContent=null), ArticleFig(id=1243880318470566236, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图9, caption=
添加择优步骤后的结果对比图, figureFileSmall=q2rJrFg1ArKKcIjYWNBmlw==, figureFileBig=JcR70G+zy+5rLpJHw98yxg==, tableContent=null), ArticleFig(id=1243880318579618141, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Fig.10, caption=
Predicted results for two clients after federated learning, figureFileSmall=QRDWQxBekRhTIhL4YqXG0g==, figureFileBig=nlo+G6N8CNf5obb0U8OIOw==, tableContent=null), ArticleFig(id=1243880318667698526, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=图10, caption=
联邦学习后两客户端的预测效果, figureFileSmall=QRDWQxBekRhTIhL4YqXG0g==, figureFileBig=nlo+G6N8CNf5obb0U8OIOw==, tableContent=null), ArticleFig(id=1243880318751584607, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Tab.1, caption=
Comparison of prediction results with different models
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型种类 | LSTM | AM-LSTM | VMD-AM-LSTM | VMD-AM-LSTM-EC |
|---|
| 均方根误差 | 2.950 | 2.244 | 1.851 | 0.593 |
| 平均绝对误差 | 2.352 | 1.776 | 1.457 | 0.340 |
| 最大误差 | 9.913 | 7.671 | 6.240 | 1.752 |
), ArticleFig(id=1243880318869025120, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=表1, caption=
不同模型预测结果对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模型种类 | LSTM | AM-LSTM | VMD-AM-LSTM | VMD-AM-LSTM-EC |
|---|
| 均方根误差 | 2.950 | 2.244 | 1.851 | 0.593 |
| 平均绝对误差 | 2.352 | 1.776 | 1.457 | 0.340 |
| 最大误差 | 9.913 | 7.671 | 6.240 | 1.752 |
), ArticleFig(id=1243880318952911201, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=EN, label=Tab.2, caption=
Statistical table of federal MMD values
, figureFileSmall=null, figureFileBig=null, tableContent=
| 最大均值差异MMD | 个数Num |
|---|
 | 0.18 | 0.42 | 0.60 | 0.61 | 0.63 | …… | 81 |
 | 1.53 | 1.73 | 1.57 | 1.79 | 1.81 | …… | 28 |
 | 0.18 | 0.42 | 0.60 | 0.61 | 0.63 | … | 31 |
 | 2.01 | 2.49 | 2.81 | 2.60 | 2.69 | … | 22 |
), ArticleFig(id=1243880319053574498, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243880299826885200, language=CN, label=表2, caption=
联邦MMD值统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| 最大均值差异MMD | 个数Num |
|---|
 | 0.18 | 0.42 | 0.60 | 0.61 | 0.63 | …… | 81 |
 | 1.53 | 1.73 | 1.57 | 1.79 | 1.81 | …… | 28 |
 | 0.18 | 0.42 | 0.60 | 0.61 | 0.63 | … | 31 |
 | 2.01 | 2.49 | 2.81 | 2.60 | 2.69 | … | 22 |
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Prediction results for different models before/after federated learnings
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| RMSE | 本地训练模型_A | 择优联邦模型_A | 本地训练模型_B | 择优联邦模型_B |
|---|
| 测试集 | 0.538 15 | 0.323 80 | 0.496 04 | 0.303 41 |
| 验证集 | 0.627 88 | 0.400 23 | 0.549 84 | 0.313 54 |
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联邦前后模型预测结果对比表
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| RMSE | 本地训练模型_A | 择优联邦模型_A | 本地训练模型_B | 择优联邦模型_B |
|---|
| 测试集 | 0.538 15 | 0.323 80 | 0.496 04 | 0.303 41 |
| 验证集 | 0.627 88 | 0.400 23 | 0.549 84 | 0.313 54 |
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