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Zude ZHOU, Desheng JIANG, Quan LIU
《机械工程前沿(英文)》 2009年 第4卷 第1期 页码 5-14 doi: 10.1007/s11465-009-0011-3
关键词: fiber Bragg grating sensor (FBGS) mechanical equipment operation safety embedded technology high-speed demodulation digital monitoring health diagnosis
Multiple fault separation and detection by joint subspace learning for the health assessment of wind
Zhaohui DU, Xuefeng CHEN, Han ZHANG, Yanyang ZI, Ruqiang YAN
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 333-347 doi: 10.1007/s11465-017-0435-0
The gearbox of a wind turbine (WT) has dominant failure rates and highest downtime loss among all WT subsystems. Thus, gearbox health assessment for maintenance cost reduction is of paramount importance. The concurrence of multiple faults in gearbox components is a common phenomenon due to fault induction mechanism. This problem should be considered before planning to replace the components of the WT gearbox. Therefore, the key fault patterns should be reliably identified from noisy observation data for the development of an effective maintenance strategy. However, most of the existing studies focusing on multiple fault diagnosis always suffer from inappropriate division of fault information in order to satisfy various rigorous decomposition principles or statistical assumptions, such as the smooth envelope principle of ensemble empirical mode decomposition and the mutual independence assumption of independent component analysis. Thus, this paper presents a joint subspace learning-based multiple fault detection (JSL-MFD) technique to construct different subspaces adaptively for different fault patterns. Its main advantage is its capability to learn multiple fault subspaces directly from the observation signal itself. It can also sparsely concentrate the feature information into a few dominant subspace coefficients. Furthermore, it can eliminate noise by simply performing coefficient shrinkage operations. Consequently, multiple fault patterns are reliably identified by utilizing the maximum fault information criterion. The superiority of JSL-MFD in multiple fault separation and detection is comprehensively investigated and verified by the analysis of a data set of a 750 kW WT gearbox. Results show that JSL-MFD is superior to a state-of-the-art technique in detecting hidden fault patterns and enhancing detection accuracy.
关键词: joint subspace learning multiple fault diagnosis sparse decomposition theory coupling feature separation wind turbine gearbox
王军,丁荣军
《中国工程科学》 2023年 第25卷 第2期 页码 232-242 doi: 10.15302/J-SSCAE-2023.02.019
随着列车运营速度不断提升、配属规模及车辆种类不断扩展,加之受长交路、多物理场耦合等复杂服役环境的影响,高速列车安全保障及经济运维的要求持续提高;高速列车健康监测与管理技术的研究与应用,为中国高速铁路的长距离、大规模、高密度运营提供了关键支撑。本文阐述了健康监测与管理对高速列车的重要价值,回顾了近20年中国高速列车健康监测与管理的发展历程:从安全监控到关键系统健康监测,再到一体化、全寿命周期的运维管理;总结了列车全方位状态监测、精准评估与诊断预测、车辆远程运维服务、智能运维决策支持等方面的重大技术突破。进一步展望了广域全过程适应性、列车数据 / 计算资源一体化管理与应用、基于健康监测与管理的列车设计、车–线–站一体化智能运维等未来发展方向,以期应对中国高速铁路面临的高效安全运维、深度降本降耗等发展挑战,推动中国高速列车技术持续领先。
张国刚,方志,唐盛华,陈素君,陈峰
《中国工程科学》 2012年 第14卷 第11期 页码 49-56
以广东惠州合生大桥为原型,基于相似理论面向健康诊断设计制作了1∶15的大比例混凝土斜拉桥模型,分析了模型设计中的问题及解决办法。建立了原型桥和模型桥的初始有限元模型(FEM),以实测数据对其进行修正,得到了符合实际的基准有限元模型,采用基准有限元模型对模型桥和原型桥的静动力特性及损伤状态下的损伤特性进行了计算和相似性分析。结果表明,模型设计中进行了各种简化和处理后,模型桥与原型桥的静动力性能及损伤状态下的损伤特性仍具有良好的相似性,采用该模型桥进行损伤识别试验研究能够较好地反映实际,为混凝土斜拉桥模型设计提供参考。
Laboratory diagnosis for malaria in the elimination phase in China: efforts and challenges
《医学前沿(英文)》 2022年 第16卷 第1期 页码 10-16 doi: 10.1007/s11684-021-0889-7
关键词: malaria laboratory diagnosis quality control malaria elimination China
Primary health care for all by 2020: The systematic reform of the medical and health system in China
《医学前沿(英文)》 2010年 第4卷 第1期 页码 3-7 doi: 10.1007/s11684-010-0024-7
Kan ZHANG MM, Wei DONG MM, Ying-Yao CHEN MD,
《医学前沿(英文)》 2010年 第4卷 第2期 页码 134-138 doi: 10.1007/s11684-010-0041-6
关键词: community health general practitioners health management
Biosensor-based assay of exosome biomarker for early diagnosis of cancer
《医学前沿(英文)》 2022年 第16卷 第2期 页码 157-175 doi: 10.1007/s11684-021-0884-z
Tomographic diagnosis of defects in hydraulic concrete structure
ZHAO Mingjie, XU Xibin
《结构与土木工程前沿(英文)》 2008年 第2卷 第3期 页码 226-232 doi: 10.1007/s11709-008-0027-5
关键词: satisfactory processing orientation tomographic diagnosis orientation perpendicular
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 814-828 doi: 10.1007/s11465-021-0650-6
关键词: bearing cross-severity fault diagnosis hierarchical fault diagnosis convolutional neural network decision tree
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0689-z
关键词: surrogate model gas face seal fault diagnosis nonlinear dynamics tribology
Machine learning for fault diagnosis of high-speed train traction systems: A review
《工程管理前沿(英文)》 doi: 10.1007/s42524-023-0256-2
关键词: high-speed train traction systems machine learning fault diagnosis
《环境科学与工程前沿(英文)》 2022年 第16卷 第4期 doi: 10.1007/s11783-021-1475-6
• The concentrations of 13 heavy metals in Taihu Lake were analyzed.
关键词: Heavy metals Human health ambient water quality criteria Taihu Lake Health risk assessment Contribution rate
Pathogenesis, diagnosis, and treatment of recurrent spontaneous abortion with immune type
Qi-De LIN, Li-Hua QIU
《医学前沿(英文)》 2010年 第4卷 第3期 页码 275-279 doi: 10.1007/s11684-010-0101-y
关键词: spontaneous abortion recurrent autoimmune alloimmune pathogenesis diagnosis immunotherapy
Intelligent diagnosis methods for plant machinery
Huaqing WANG, Peng CHEN, Shuming WANG,
《机械工程前沿(英文)》 2010年 第5卷 第1期 页码 118-124 doi: 10.1007/s11465-009-0084-z
关键词: intelligent diagnosis neural network fuzzy algorithm adaptive filtering plant machinery
标题 作者 时间 类型 操作
Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg
Zude ZHOU, Desheng JIANG, Quan LIU
期刊论文
Multiple fault separation and detection by joint subspace learning for the health assessment of wind
Zhaohui DU, Xuefeng CHEN, Han ZHANG, Yanyang ZI, Ruqiang YAN
期刊论文
Primary health care for all by 2020: The systematic reform of the medical and health system in China
期刊论文
The next step of community health construction: Training general practitioners and implementing health
Kan ZHANG MM, Wei DONG MM, Ying-Yao CHEN MD,
期刊论文
convolutional tree-inspired network: a decision-tree-structured neural network for hierarchical fault diagnosis
期刊论文
Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models
期刊论文
Human health ambient water quality criteria for 13 heavy metals and health risk assessment in Taihu Lake
期刊论文
Pathogenesis, diagnosis, and treatment of recurrent spontaneous abortion with immune type
Qi-De LIN, Li-Hua QIU
期刊论文