A5100717537- Magnetic Bearings and Levitation Dynamics
- Tribology and Lubrication Engineering
- Advanced Algorithms and Applications
- Industrial Technology and Control Systems
- Electric Motor Design and Analysis
- Effects of Environmental Stressors on Livestock
- Geoscience and Mining Technology
- Higher Education Governance and Development
- Smart Grid Security and Resilience
- Railway Engineering and Dynamics
- Engineering and Technology Innovations
- Advanced Sensor and Control Systems
- International Student and Expatriate Challenges
- Geomechanics and Mining Engineering
- Computational Fluid Dynamics and Aerodynamics
- Communication in Education and Healthcare
- Turbomachinery Performance and Optimization
- Heat Transfer Mechanisms
- Information and Cyber Security
- Advanced Battery Technologies Research
- Adaptive Dynamic Programming Control
- Magnetic Properties of Alloys
- Statistical Distribution Estimation and Applications
- Machine Fault Diagnosis Techniques
- Aerodynamics and Fluid Dynamics Research
Beijing Jiaotong University
2024
Qingdao Center of Resource Chemistry and New Materials
2018-2024
China Academy of Space Technology
2022-2024
National University of Defense Technology
2022-2023
China Three Gorges University
2022
China Energy Engineering Corporation (China)
2022
Lanzhou University of Technology
2020
Shenyang Institute of Engineering
2020
Shanghai Institute of Hypertension
2016
Ruijin Hospital
2016
The majority of electromagnetic force calculation models employed in maglev vehicle system dynamics focus exclusively on vertical and lateral movement while neglecting the nonlinear magnetization properties ferromagnetic materials. This oversight leads to discrepancies between simulations actual conditions. To enhance accuracy evaluate performance systems under various operational conditions, it is imperative identify an model that combines applicability. address this objective, paper...
This work provides a new approach for modeling the electromagnets of magnetic levitation (Maglev) vehicle Transrapid intending to effectively and efficiently represent statics dynamics in frequency range relevant Maglev control design use mechatronic simulation models. It includes effects reluctances, fringing leakage flux, saturation, eddy currents. The follows systematic by setting up equivalent electric circuits, coupling equations using Ampère's circuital law Faraday's induction...
Abstract High‐speed Maglev is a cutting‐edge technology brought back into the focus of research by plans Chinese government for development new 600 km/h train. A Chinese‐German cooperation with industrial and academic partners has been established to pursue this ambitious goal bring together experts from multiple disciplines. This contribution presents joint work achievements CRRC Qingdao Sifang, thyssenkrupp Transrapid, CDFEB, ITM University Stuttgart, regarding in field high‐speed systems....
To investigate the dynamic effects of bolster-hanger length on 600 km/h high-speed EMS maglev vehicles, a model three-car trainset is established, considering kinematic relation mechanism and active levitation/guidance control system. Model validation carried out by comparing simulated results with test Shanghai vehicles. Then, proposed used to simulate response vehicles four different hanger lengths 0.12, 0.18, 0.24, 0.36 m passing through straight track, horizontal curve vertical curve....
In order to investigate the effect of inner loop current gain coefficient, time lag and levitation perturbation on static suspension stability for maglev vehicle, a vertical vibration model HSST-type train with five frames was established. The following conclusions are drawn based obtained results: suppressing vehicle-guideway coupling vibration, coefficient should take large value in double control, such as 300. If one controller has constant delay, 4 ms, instability will occur vehicle....
The violent coupled vibration between the electromagnetically levitated vehicles and steel switch girder had happened in several engineering practices, especially under very low speed conditions. In order to simulate accurately abnormal explore its underlying causes, this paper develops a distributed co-simulation framework, including maglev vehicle dynamic modelling by SIMPACK software, ANSYS software coupler developed C++ language implement of system. Dynamic response system various...
With the expansion of cyber-physical system (CPS) application area, its importance has become more and prominent. As one typical applications CPS, anomaly detections mobile robots have attracted attention all parties. part face problem that conventional residual-based detection methods cannot identify stealthy anomalies. The mainly use residual signal calculated from control measure output for detection, which is widely used in fault diagnosis. Still, it difficult to be useful deceptive...
To maintain the stable suspension of high-speed maglev vehicles, a predictive control algorithm based on neural networks is proposed. Initially, vehicle dynamic response prediction model built using long short-term memory network considering its’ time-varying and nonlinear characteristics. This achieves precise online electromagnetic gap. Then, utilized to construct algorithm. Finally, effectiveness this verified by simulations experiments. The results demonstrate that can accurately...
This research explores a novel paradigm for preserving topological segmentations in existing error-bounded lossy compressors. Today's compressors rarely consider topologies such as Morse-Smale complexes, and the discrepancies topology between original decompressed datasets could potentially result erroneous interpretations or even incorrect scientific conclusions. In this paper, we focus on 2D/3D piecewise linear scalar fields, targeting precise reconstruction of minimum/maximum labels...
We propose a multi-tier paradigm to preserve various components of Morse-Smale complexes in lossy compressed scalar fields, including extrema, saddles, separatrices, and persistence diagrams. Existing error-bounded compressors rarely consider preserving topological structures such as discrete complexes, leading significant inaccuracies data interpretation potentially resulting incorrect scientific conclusions. This paper mainly focuses on the 2D or 3D fields by precisely critical simplices...
In this paper, the influence of multi-rough element combination controlled by cubic polynomial on flow field hypersonic blunt wedge is studied direct numerical simulation. The mechanism six continuous rough combinations parameters in boundary layer analyzed depth, and compared with double elements. It concluded that first has a great pressure, latter decreases turn. elements wall can better suppress incoming heating reduce friction Compared smooth wall, are reduced 25.23 % 2.69 %, respectively.
The maglev train is an open-loop and unstable complex nonlinear system. Generally, design of offline controllers based on a single operating state. However, the system will influence by various factors in actual operation. When model changes, controller designed tuned suffer severe performance degradation that affect system's stability. This paper proposes Data-Ddriven Optimal Controller (DDOC) Q-learning theory reinforcement learning response to this problem. does not need know information...
Objective : To investigate the relationships between resting heart rate (RHR) and ankle brachial index (ABI).Methods: It was a cross-sectional study.Among 101,510 employees of Tangshan KaiLuan Company who underwent annual health examination during July 2006 to October 2007, 5,852 were selected using stratified random sampling method.Finally, data 4,778 collected with unified questionnaire from blood biochemistry tests met study criteria used for final analysis.Multivariate logistic...
Objective : To investigate the relationships between resting heart rate (RHR) and ankle brachial index (ABI).Methods: It was a cross-sectional study.Among 101,510 employees of Tangshan KaiLuan Company who underwent annual health examination during July 2006 to October 2007, 5,852 were selected using stratified random sampling method.Finally, data 4,778 collected with unified questionnaire from blood biochemistry tests met study criteria used for final analysis.Multivariate logistic...
As the application of cyber-physical systems (CPSs) becomes more and widespread, its security is becoming a focus attention. Currently, there has been much research on defense physical layer CPS. However, most only focuses one aspects, for example, attack detection, state estimation, or recovery control. Obviously, effectiveness targeting aspect limited. Therefore, in this paper, set processes proposed case that CPS containing multiple sensors subject to three kinds stealthy attacks (i.e.,...
Abstract Preventive maintenance (PM) for multi-unit parallel system with limited production resource is a crucial issue. To find solution the issue, this study focused on one repairman and some spare units, developed an optimization model system. In model, PM policy cold unit number were jointly considered. After optimization, optimal interval of running obtained. Then, numerical example was analyzed to illustrate proposed results attained based sensitive analysis.