A5064631631- Ultrasonics and Acoustic Wave Propagation
- Flow Measurement and Analysis
- Structural Health Monitoring Techniques
- Image and Signal Denoising Methods
- Acoustic Wave Phenomena Research
- Speech and Audio Processing
- High-Velocity Impact and Material Behavior
- Wind and Air Flow Studies
- Advanced Fiber Optic Sensors
- Advanced MEMS and NEMS Technologies
- Photonic and Optical Devices
- Geophysical Methods and Applications
- Infrastructure Maintenance and Monitoring
- Gait Recognition and Analysis
China Academy of Space Technology
2021-2025
The detection of continuous acoustic sources on composite structures is an important research direction in the field structural health monitoring. However, complexity signal and anisotropy materials lead to difficulty location. Therefore, a method source location for structure based dispersion wave velocity modified beamforming proposed. In this method, L-shaped sensor array used locate with algorithm, velocity-direction curve constructed by selecting filter frequency band optimal weight...
The analysis of acoustic signals to localize emission (AE) sources has emerged as a kind favored approach. Despite recent advances, the task localizing AE such impacts in discontinuous structure with hole still poses considerable challenge. A method based on gradient vector descent is presented this article, which applied hole. When an impact event observed, will first calculate time difference-of-arrival values different sensors and set most likely location origin coordinates. Then, tracks...
Composites play an important role in the development of modern science and technology, but special anisotropy leads to difficulties impact localization. To achieve localization on composite materials, this paper proposes a time difference matrix matching method with edge accuracy optimization. The uses propagation characteristics Lamb wave materials solve direction dependence velocity. overcome anisotropy, feature vector each element material is obtained by grid division, location found...
With the increasing number of space debris and extreme working environment, station faces risk cabin damage. Once leakage occurs, it must be repaired in time. Identifying shape leaks can guide for astronauts to make plugging plans. The current research on leak identification methods is mostly aimed at circular with different diameters, there little shapes. Therefore, great significance methods. A method identifying categories vacuum based improved variational mode decomposition support...