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Digital twin-assisted gearbox dynamic model updating toward fault diagnosis

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-023-0748-0

Abstract: One of the core challenges of intelligent fault diagnosis is that the diagnosis model requires numerousGenerating training data using a virtual model is a potential solution for addressing such a problem,In this study, a digital twin-assisted dynamic model updating method for fault diagnosis is thus proposedupdating.Finally, the proposed method is successfully applied to the dynamic model updating of a single-stage

Keywords： digital twin     gearbox     model construction     model updating     physical–virtual interaction    

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Multi-stage Model Updating Method via Substructure Analysis

Guo Li,Li Zhaoxia,Chen Hongtian

Strategic Study of CAE 2006, Volume 8, Issue 9,   Pages 42-48

Abstract:

Basing on substructure analysis, original research on multi-stage model updating method (MSMUM) ispresented to reduce the uncertainties in traditional model updating process.The kernel philosophy of the multi-stage model updating method is used to update a complicated FE modelComparing the updated FE model here with the updated model using traditional updating method, it couldbe concluded that the multi-stage updating method is more effective.

Keywords： model updating     substructure     error localization     parameters updating     Runyang Bridge    

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Dynamic test and finite element model updating of bridge structures based on ambient vibration

HUANG Minshui, ZHU Hongping, LI Lin, GUO Wenzeng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 139-144 doi: 10.1007/s11709-008-0028-4

Abstract: In this paper, a three-dimensional finite-element model is first established for a highway bridge overa set of data is selected based on sensitivity analysis and optimization theory; the finite element modelexperimental results show that the updated method is more simple and effective, the updated finite element model

Keywords： numerical     effective     Highway     vibration     complex external    

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Ambient vibration testing and updating of the finite element model of a simply supported beam bridge

Ivan Gomez ARAUJO, Esperanza MALDONADO, Gustavo Chio CHO

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 344-354 doi: 10.1007/s11709-011-0124-8

Abstract: ambient vibration test on a concrete bridge constructed in 1971 and calibration of its finite element modelThen, these characteristics were used to update the finite element model of the bridge by formulatingtransverse; and these experimentally obtained dynamic characteristics were also achieved in the analytical modelthrough updating.optimization techniques showed great versatility to optimize any number and type of variables in the model

Keywords： modal analysis     parameter identification     ambient vibration test     Eigensystem Realization Algorithm (ERA) method     finite element method    

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Finite element model updating of a large structure using multi-setup stochastic subspace identification

Reza KHADEMI-ZAHEDI, Pouyan ALIMOURI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 965-980 doi: 10.1007/s11709-019-0530-x

Abstract: analysis in conjunction with bees optimization algorithm are utilized to update the finite element modelstructure located in Shahid Chamran university of Ahvaz, Iran, to update parameters of its finite element model

Keywords： operational modal analysis     solar power plant structure     multi-setup stochastic subspace     bees optimization algorithm     sensitivity analysis    

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Engineering Application of FEM Updating Technology

Chen Decheng,Wei Zhensong,Qu Guangji,Zhu An wen,Xiao Yifang

Strategic Study of CAE 2001, Volume 3, Issue 10,   Pages 59-63

Abstract:

In this paper, focusing on practical engineering application of Finite Element Model (FEM) updatingThis paper explains the basic thought and numerical method of a FEM updating approach that has achievedThis paper also presents the difficulties in the practical engineering application of Finite Element Model(FEM) updating technology, and indicates the ways by which those difficulties can be solved.

Keywords： FEM updating     test model     sensitivity     dynamic reduction     natural frequency     mode shape    

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Design and analysis for health-diagnosis-oriented test model of cable stayed bridge

Zhang Guogang,Fang Zhi,Tang Shenghua,Chen Sujun,Chen Feng

Strategic Study of CAE 2012, Volume 14, Issue 11,   Pages 49-56

Abstract: justify;">Taking the Hesheng Bridge as the prototype, a health-diagnosis-oriented concrete cable-stayed modelThe initial finite element model(FEM) of prototype and model bridge were established and the baselineFEM were computed after model updating.simplifications and treatments, the static and dynamic characteristic and damage characteristic of modelThe method can provide a reference for the model design of concrete cable stayed bridge.

Keywords： concrete cable-stayed bridge     model design     model updating     damage diagnosis    

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Map Update in Raster Mode by Means of Aerial and Space Images

Lin Zongjian

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 43-47

Abstract:

To meet the urgent needs of updating 1：10 000 scale and 1 ：50 000 scale topographic map for the whole

Keywords： surveying and mapping     remote sensing     map updating     digital raster graphic (DRG)    

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Strategic Updating of Internet Plus Considering Digital Transformation

He Wei,Zhang Weidong,Wang Chaoxian

Strategic Study of CAE 2020, Volume 22, Issue 4,   Pages 10-17 doi: 10.15302/J-SSCAE-2020.04.002

Abstract:

Since the Internet Plus initiative was proposed five years ago, innovations associated with the new-generation information technology have accelerated and digital transformation of the economy and society has exhibited many new features. These necessitate the construction of a new system and exploration of new paths for the transformation, and measures currently taken under the Internet Plus initiative need to be evolved and upgraded. This study follows the objective laws of technological industry transformation and is based on the theoretical paradigm of technology economics. It analyzes the new trend and research frontiers of digital transformation at the technology, application, and policy levels. The study reveals that the current technology system and technological capabilities of digital transformation have gradually improved, a new blueprint for the transformation has emerged, and the integration of information technology with the real economy has entered a new stage. However, the digital transformation framework system needs to be reconstructed, the key elements of transformation needs to be strengthened, and key breakthroughs need to be achieved. To this end, in the follow-up policy design of the Internet Plus initiative and during the formulation of the 14th Five-Year Plan, China should focus on exploring the potentials of digital elements, promote the construction of the digital transformation ecology, establish transformation and innovation networks, and upgrade the policy support system for the Internet Plus initiative, thereby promoting the digital transformation of economy and society to a higher level.

Keywords： technology industry transformation     digital transformation     Internet Plus     industry upgrade    

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Updating the Fossil-fired Power Infrastructure via Supercritical Thermal Power Units

Song Zhiping

Strategic Study of CAE 2002, Volume 4, Issue 2,   Pages 22-27

Abstract: This paper points out that China should follow this way of development for updating the fossil-fired

Keywords： thermal power infrastructure     supercritical steam conditions     ultra-supercritical power unit     sustainable development    

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Efficientmesh denoising via robust normal filtering and alternate vertex updating Article

Tao LI, Jun WANG, Hao LIU, Li-gang LIU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11,   Pages 1828-1842 doi: 10.1631/FITEE.1601229

Abstract: Based on the robust guided normal estimation and alternate vertex updating strategy, we investigate aIn the vertex updating process, we classify vertices according to filtered normals at each iteration

Keywords： Mesh denoising     Guided normal filtering     Alternate vertex updating     Corner-aware neighborhoods    

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DDUC: an erasure-coded system with decoupled data updating and coding Research Article

Xiang LI, Yibing LI, Chunrui TANG, Yingsong LI,chunruitang@126.com

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5,   Pages 742-758 doi: 10.1631/FITEE.2200253

Abstract: To improve the accuracy of modulated signal recognition in variable environments and reduce the impact of factors such as lack of prior knowledge on recognition results, researchers have gradually adopted deep learning techniques to replace traditional modulated signal processing techniques. To address the problem of low recognition accuracy of the modulated signal at low signal-to-noise ratios, we have designed a novel network of multi-scale analysis with deep threshold noise elimination to recognize the actually collected modulated signals under a symmetric cross-entropy function of label smoothing. The network consists of a denoising encoder with deep adaptive threshold learning and a decoder with . The two modules are skip-connected to work together to improve the robustness of the overall network. Experimental results show that this method has better recognition accuracy at low signal-to-noise ratios than previous methods. The network demonstrates a flexible self-learning capability for different noise thresholds and the effectiveness of the designed feature fusion module in multi-scale feature acquisition for various modulation types.

Keywords： Signal noise elimination     Deep adaptive threshold learning network     Multi-scale feature fusion     Modulation recognition    

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Standard model of knowledge representation

Wensheng YIN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 275-288 doi: 10.1007/s11465-016-0372-3

Abstract: methods include predicate logic, semantic network, computer programming language, database, mathematical modelintrinsic link between various knowledge representation methods, a unified knowledge representation modelAccording to ontology, system theory, and control theory, a standard model of knowledge representationThe model is composed of input, processing, and output.In addition, the standard model of knowledge representation provides a way to solve problems of non-precision

Keywords： knowledge representation     standard model     ontology     system theory     control theory     multidimensional representation    

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State of the Art of Compartment Fire Modeling

Zheng Xin,Yuan Hongyong

Strategic Study of CAE 2004, Volume 6, Issue 3,   Pages 68-74

Abstract: The relevant underlying physical assumptions are presented first and the conventional model performance

Keywords： compartment     field model     zone model     network model     FZN (field     zone and network) model     empirical model    

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Title Author Date Type Operation

Digital twin-assisted gearbox dynamic model updating toward fault diagnosis

Journal Article

Multi-stage Model Updating Method via Substructure Analysis

Guo Li,Li Zhaoxia,Chen Hongtian

Journal Article

Dynamic test and finite element model updating of bridge structures based on ambient vibration

HUANG Minshui, ZHU Hongping, LI Lin, GUO Wenzeng

Journal Article

Ambient vibration testing and updating of the finite element model of a simply supported beam bridge

Ivan Gomez ARAUJO, Esperanza MALDONADO, Gustavo Chio CHO

Journal Article

Finite element model updating of a large structure using multi-setup stochastic subspace identification

Reza KHADEMI-ZAHEDI, Pouyan ALIMOURI

Journal Article

Engineering Application of FEM Updating Technology

Chen Decheng,Wei Zhensong,Qu Guangji,Zhu An wen,Xiao Yifang

Journal Article

Design and analysis for health-diagnosis-oriented test model of cable stayed bridge

Zhang Guogang,Fang Zhi,Tang Shenghua,Chen Sujun,Chen Feng

Journal Article

Map Update in Raster Mode by Means of Aerial and Space Images

Lin Zongjian

Journal Article

Strategic Updating of Internet Plus Considering Digital Transformation

He Wei,Zhang Weidong,Wang Chaoxian

Journal Article

Updating the Fossil-fired Power Infrastructure via Supercritical Thermal Power Units

Song Zhiping

Journal Article

Efficientmesh denoising via robust normal filtering and alternate vertex updating

Tao LI, Jun WANG, Hao LIU, Li-gang LIU

Journal Article

DDUC: an erasure-coded system with decoupled data updating and coding

Xiang LI, Yibing LI, Chunrui TANG, Yingsong LI,chunruitang@126.com

Journal Article

Standard model of knowledge representation

Wensheng YIN

Journal Article

Zhang Zhengyan: Pre Training Language Model Integrating Knowledge (2020-4-3)

18 Apr 2022

Conference Videos

State of the Art of Compartment Fire Modeling

Zheng Xin,Yuan Hongyong

Journal Article