A5036365573- Electric Motor Design and Analysis
- Sensorless Control of Electric Motors
- Magnetic Bearings and Levitation Dynamics
- Magnetic Field Sensors Techniques
- Atomic and Subatomic Physics Research
- Advanced Sensor and Control Systems
- Multilevel Inverters and Converters
- Superconducting Materials and Applications
- Advanced Algorithms and Applications
- Embedded Systems and FPGA Design
- Advanced Computational Techniques and Applications
- Particle accelerators and beam dynamics
- Geophysics and Sensor Technology
- High voltage insulation and dielectric phenomena
- Aerosol Filtration and Electrostatic Precipitation
- Advanced MRI Techniques and Applications
- Magnetic Properties and Applications
- Engineering Applied Research
- Inflammatory Biomarkers in Disease Prognosis
- Gear and Bearing Dynamics Analysis
- Flow Measurement and Analysis
- Simulation and Modeling Applications
- Inertial Sensor and Navigation
- Non-Invasive Vital Sign Monitoring
- Mechanical Failure Analysis and Simulation
Beihang University
2017-2025
Huazhong University of Science and Technology
2025
Ningbo University of Technology
2021-2024
Nantong University
2019-2024
Linyi People's Hospital
2023-2024
Hebei University of Science and Technology
2023
China Design Group (China)
2023
University of Science and Technology Beijing
2023
Changchun University
2020
Beijing Microelectronics Technology Institute
2019
Abstract The repair of large bone defects with complex geometries remains a major clinical challenge. Here, we explored the feasibility fabricating polylactic acid-hydroxyapatite (PLA-HA) composite scaffolds. These scaffolds were constructed from vascularized tissue engineered using an in vivo bioreactor (IVB) strategy three-dimensional printing technology. Specifically, rabbit model was established to prefabricate two groups. An experimental group (EG) designed tibial periosteum capsule...
Particulate matter (PM) poses a threat to people's living environment. Fresh air ventilation systems can filter particulate and play an important role in enhancing indoor quality. A high filtration efficiency material with low pressure drop prolongs the service life of filters reduces energy consumption. However, maintaining long-term storage charge electret materials remains challenge. Herein, we report novel sheath/core bicomponent spunbond (BCS) improved stability using...
The sensorless drive method of the permanent magnet synchronous motor (PMSM) has attracted wide attention for its low cost and high reliability. As a critical technology, fast high-precision rotor-position estimation is essential. This article addresses position-estimation deviation issue based on sliding-mode observer (SMO) phase-locked loop (PLL). A nonlinear equivalent model SMO established to analyze compensate caused by SMO, feed-forward PLL employed suppress steady-state position...
Sensorless control is an effective measure to improve reliability and reduce cost for the brushless dc motor (BLDCM). However, performance generally related complexity of system, making it difficult engineering applications. Therefore, this article proposes a high-dynamic low-cost sensorless method high-speed BLDCMs using rich built-in resources digital signal processor. First, variable relating commutation moment constructed detected, which not affected by modulation noise. Then, detailed...
Facing the threats of infectious diseases, we take various actions to protect ourselves, but few studies considered an evolving system with competing strategies. In view that, propose evolutionary epidemic model coupled human behaviors, where individuals have three strategies: vaccination, self-protection and laissez faire, could adjust their strategies according neighbors' payoffs at beginning each new season spreading. We found a counter-intuitive phenomenon analogous well-known Braess's...
Gallstones are a common digestive disorder, yet the association between fibrosis-4 index (FIB-4) and gallstone formation remains poorly understood. This study explores link FIB-4 levels prevalence among US adults. was based on data from 2017-2020 National Health Nutrition Examination Survey (NHANES), which included 7,771 participants. The risk analyzed using multivariate logistic regression with restricted cubic spline (RCS) analysis to assess nonlinear correlations, threshold effects...
As aerospace applications, high reliability and low power consumption operation of the brushless direct current (BLDC) motor for magnetically suspended control moment gyro (MSCMG) is primary consideration. To guarantee reliability, sensorless without position sensors adopted. Due to phase lag caused by hardware software, commutation error inevitable. In order reduce losses, this article proposes a fast compensation method improve accuracy. First, topology BLDC with buck converter point...
Due to the asymmetry of actual back electromotive force (back EMF), performance conventional commutation deviation correction method degrades in sensorless control brushless direct current (BLDC) motor. This article proposes a high-precision optimal strategy, which considers problems EMF. First, this discusses issues and internal power factor angle based method. Then, given issue nonsinusoidal phase integration asymmetric EMF, dual improved second-order generalized integrator with positive...
Accurate commutation point is essential to ensure the ideal torque performance and low power consumption for brushless DC (BLDC) motor. In order achieve precise sensorless at a constant or rapidly varying speed, fast error correction method proposed in this article. First, it pointed out that controlled variable variation, high rate of relative speed nonlinearity loop are main origins when varies rapidly. Then, novel through following three aspects: first, constructing first utilized...
This article focuses on the sensorless commutation strategy of brushless DC (BLDC) motor with three-phase nonideal asymmetric back-EMFs (NAEMFs). To improve torque performance and reduce power consumption, this addresses two key issues: pointing out accurate positions BLDC NAEMFs proposing a novel closed-loop error compensation to obtain positions. First, are proved from relationship between electromagnetical curve polar coordinates. Then, feedback network sampling subsystem utilized sample...
As a space application, the brushless dc motor (BLDCM) configured in magnetically suspended control moment gyroscope has extremely high requirements for reliability and power consumption, where accurate commutation is key point. However, inevitable nonideal factors, especially asymmetric back-electromotive force (back EMF) characteristics, would dramatically reduce accuracy. In order to meet requirements, this article proposes fast self-correction method sensorless BLDCMs with back EMF....
Abstract Magnetoencephalography (MEG) system based on optically pumped magnetometers (OPMs) requires a magnetically shielded room (MSR) to establish stable near-zero field environment. Affected by external environmental electromagnetic interference, the magnetic noise in MSR will become very severe. In order overcome this problem, paper proposes method for dynamic stabilisation of fields measured inside using an coil system. Firstly, form compensation was analysed taking AC characteristics...