A5066104151- Ultrasonics and Acoustic Wave Propagation
- Structural Health Monitoring Techniques
- Acoustic Wave Phenomena Research
- Machine Fault Diagnosis Techniques
- Vehicle Noise and Vibration Control
- Gear and Bearing Dynamics Analysis
- Mechanical Engineering and Vibrations Research
- Non-Destructive Testing Techniques
- Soil Mechanics and Vehicle Dynamics
- Vibration Control and Rheological Fluids
- Tribology and Lubrication Engineering
- Geophysical Methods and Applications
- Aerodynamics and Fluid Dynamics Research
- Magnetic Bearings and Levitation Dynamics
- Engineering Applied Research
- Engineering Diagnostics and Reliability
- Structural Engineering and Vibration Analysis
- Mechanical Failure Analysis and Simulation
- Railway Engineering and Dynamics
- Probabilistic and Robust Engineering Design
- Geotechnical Engineering and Underground Structures
- Vehicle Dynamics and Control Systems
- Speech and Audio Processing
- Aerodynamics and Acoustics in Jet Flows
- Advanced Measurement and Detection Methods
Beihang University
2016-2025
Hangzhou Institute of Applied Acoustics
2023
Ministry of Transport
2022
State Key Laboratory of Vehicle NVH and Safety Technology
2021
University of Minnesota
2016
Twin Cities Orthopedics
2016
Hangzhou Dianzi University
2013
Nanchang University
2008
Bolted joints are a critical fastening method widely used in mechanical structures, and monitoring their loosening, particularly the early is crucial for ensuring structural safety reliability. This article presents full lifecycle quantitative warning of bolt loosening based on acoustic emission (AE) technology. Variational mode decomposition applied to AE signals from bolted joint interface extract energy characteristics intrinsic functions (IMFs). The IMFs most sensitive changes preload...
Passive dynamic vibration absorber (DVA) is widely used in structural reduction, and the higher efficient DVA always required for some special situations. This paper aims to propose novel inerter-based absorbers (IDVAs) enhance performance of passive DVA. First, several IDVAs are presented by matching inerter with different places. Then, closedform optimal parameters six kinds obtained based on classical fixed-point theory. The demonstrates that all inerters connected between primary system...
Bearing is a key component of satellite inertia actuators such as moment wheel assemblies (MWAs) and control gyros (CMGs), its operating state directly related to the performance service life satellites. However, because complexity vibration frequency components bearing small loading, normal running bearings normally present similar fault characteristics in long-term ground experiments, which makes it difficult judge status. This paper proposes an automatic diagnosis method for based on...
In order to reduce the structural vibrations of a mechanical system used in aerospace, new sketch eddy current damper (ECD), consisting one cylindrical permanent magnet, two ring-shape copper plates, axial transmission shaft and electromagnetic shield, is proposed. Three dimensional (3D) transient analysis on damping performance proposed conducted by ANSYS determine dimensions designed damper. And series tests for subjected sinusoid excitations with amplitudes around 0.1 1 mm are...
Precision equipment is usually accompanied with vibrations during road or railway transportation. Sometimes the vibration exceeds given limit, leading to damage of equipment. It necessary control However, it still difficult adjust parameters a designed isolation system for transportation different precision under various conditions. Aiming at satisfying requirements equipment, this paper proposes parallel air spring based on principle limiting lateral deflection. According measured...
Robustness optimization to enhance the reliability of an engine mounting system (EMS) is necessary in decoupling design EMS, because stochastic factors or uncertainties will have a significant influence on state and decrease system. This paper carries out robustness based torque roll axis theory. After building dynamic model constraints objective functions are improved by principle Six Sigma. A complete process built examples for three different types EMS calculated analyzed. The results...
The rolling bearings in moment wheel assemblies (MWAs) or control gyros (CMGs) are not only the core components spacecrafts but also prone to failure. Therefore, a high reliability is critical characteristic for spacecraft bearings, and long-life testing on ground one of main means bearing assessment. In practical applications, convenient reliable method required monitoring health status abnormal MWAs during test. this paper, based clustering fusion normal operation acoustic parameters...