A5101729513- Adaptive optics and wavefront sensing
- Infrared Target Detection Methodologies
- Advanced optical system design
- Thermal Radiation and Cooling Technologies
- Optical Systems and Laser Technology
- Impact of Light on Environment and Health
- Calibration and Measurement Techniques
- Metamaterials and Metasurfaces Applications
- Non-Destructive Testing Techniques
- Advanced Optical Sensing Technologies
- solar cell performance optimization
- Magnetic Properties and Applications
- Optical Coatings and Gratings
- Welding Techniques and Residual Stresses
- Hydrogen embrittlement and corrosion behaviors in metals
- Nuclear and radioactivity studies
- Space Satellite Systems and Control
- Inertial Sensor and Navigation
- Food composition and properties
- Photonic Crystal and Fiber Optics
- Astronomical Observations and Instrumentation
- Laser-Matter Interactions and Applications
- Corrosion Behavior and Inhibition
- Advanced Fiber Laser Technologies
- Lanthanide and Transition Metal Complexes
Tsinghua University
2024
Changchun University of Science and Technology
2023-2024
Beijing Institute of Technology
2024
China National Petroleum Corporation (China)
2022
Nanjing University of Finance and Economics
2021
Xi'an University of Technology
2017-2020
Dalian University of Technology
2017
Dalian University
2017
Geely (China)
2013
Chery Automobile (China)
2013
In this study, a giant magnetostrictive ultrasonic transducer was designed with Terfenol-D as the active material. The influence of different rod structures on performance investigated. Finite element analysis used to analyze dynamics theoretical and validate design. Eddy current losses were simulated for rods various using finite in ANSYS Maxwell. Two then fabricated either slices along axial direction or slit radial direction, impedance amplitude composed two measured. results suggest that...
This study proposes an optical illumination system design based on vector diffraction characteristics and the Scheimpflug principle to determine optimal relationship between uniformity, energy utilization, size in infrared scene projector. We investigate influence of digital micromirror device (DMD) efficiency at different incidence angles utilization rate establish a two-dimensional grating model angle DMD beam. demonstrate that long-wave (LWIR) projector can simulate with compact...
This paper provides a design method of novel giant magnetostrictive ultrasonic transducer utilized in incremental sheet metal forming. The frequency equations the vibrator were deduced and corresponding correctness verified by modal harmonic response characteristic through finite element (FEM) ANSYS software. In addition, magnetic field system was designed ANSYS. Finally, tests based on impedance analysis amplitude measurements laser displacement sensor performed prototype. results confirmed...
In the process of designing and adjusting solar simulator, side lobe effect aberration optical integrator affect irradiation uniformity, an integrating sphere is proposed to replace for uniform light compound parabolic reflector beam shaping. First, based on equal illuminance theorem radiation transfer theory, calculation formula energy transmission efficiency porous derived; Then, hole interference factor introduced, effects aperture size sphere, radius position baffle uniformity are...
Abstract For the current stellar spectral simulation can not realize color temperature information with large dynamic range simulation, this paper proposes a broad spectrum high-resolution subdivision and spatial beam zoning modulation combined of radiation method, designed kind imaging non-imaging optical system, using an system to achieve multi-color simulation. The experimental results show that simultaneously accuracy (single point evaluation) better than ± 7% in 450–1000 nm 3000–11,000...
The existing infrared target simulation system with a total internal reflection (TIR) prism has the problem of low imaging contrast ratio, which will seriously affect quality simulated image. This study proposes design method optimized TIR (OTIR) based on Snell's law in medium-wave (MWIR) to solve problem. radiation theory is used construct constraint model OTIR MWIR system. Further, this investigates influence different states digital micromirror device beam direction and derives equation...
Dispersion plays a great role in ultrafast laser oscillators, ultrashort pulse amplifiers, and many other nonlinear optical dynamics. Therefore, dispersion measurement is crucial for device characterization, system design dynamics investigation therein. In this work, we demonstrate versatile approach, i.e., Kalman filtering-aided white-light interferometry, group delay (GDD) characterization. Extended filter adopted to track the cosine-like interferogram, eliminate unintended bias envelope,...
For the current spectral simulation based on Digital Micromirror, unit has different bias properties and nonlinear modulation, which leads to lack of a method for multiple color temperature modulation. In this paper, stellar spectrum Genetic Algorithm fuzzy PID compound control was proposed. It analyzed composition working principle system, designed corresponding matrix algorithm, studied algorithm PID, constructed dual-input, three-output controller architecture, dual-optimized algorithm....
This study proposes a parabolic off-axis reflective optical system design method to reduce the wave aberration of large aperture single star simulator and improve system’s imaging quality. Firstly, we determined indexes by analyzing technical sensitizer development status simulator; secondly, initial structural parameters were calculated based on theory primary aberration; then, carried out optimization system, image quality evaluation, tolerance analysis using Zemax software; finally,...
This study proposes an ultraviolet-visible composite optical target simulation technique based on a liquid crystal display (LCD) spatial light modulation device to solve the problem of not being able satisfy demand for both ultraviolet and visible operating spectral ranges in single system when multi-source targets is performed. We establish source model emitting diode (LED) xenon lamp enhance energy portion, mixed homogenized by integrating sphere. analyze transmission principle LCD devices...
This study investigated the multiple correlations among spectral simulation units based on digital micromirror device (DMD) simulation, which leads to problem that conventional methods such as PID control exhibit a low fitting accuracy or long time in of various targets. In this paper, method stellar spectrum back propagation neural network-based (BP-PID) is proposed achieve high efficiency and precision The topology BP network was constructed modulation model DMD system, algorithm BP-PID...
The simulation of terrestrial stellar radiation information suffers from distortions due to limited precision spectrum and magnitude simulations. Hence, the effective verification evaluation experimental conditions for new techniques such as astronomical spectral velocity measurement navigation are hindered. This study proposes a multi-color temperature multi-magnitude approach navigation. First, we analyzed composition operational principles system. Furthermore, established mathematical...
Structure optimization and the application of light material process were two main ways integral body lightweight. So ultra high strength steel was applied to anterior anti-collision beam aim study. In this study, performance development frontal impact taken for example, selected lightweight analyzed, structure established. The front optimized following process. front-end obtained under guaranteed collision performance.
A new Ru-Ni-Nb combined cathode modification for Ti-6Al-4V alloy was investigated. There a multiple blocking mechanism existed in the passivation film of modified alloy, which not only increased surface potential, but also greatly decreased number metastable oxides and point defects passive film, reduced transport diffusion process titanium ions and/or oxygen thus effectively reducing destruction maintaining stability integrity oxide has excellent corrosion resistance harsh oil &gas...