A5100622092- Planetary Science and Exploration
- Astro and Planetary Science
- Spacecraft Design and Technology
- Rocket and propulsion systems research
- Space Exploration and Technology
- Spacecraft Dynamics and Control
- Spacecraft and Cryogenic Technologies
- Electromagnetic Launch and Propulsion Technology
- Aerospace Engineering and Control Systems
- Space Satellite Systems and Control
- Remote Sensing and Land Use
- Guidance and Control Systems
- High-Velocity Impact and Material Behavior
- Technology Assessment and Management
- Space Science and Extraterrestrial Life
- Scientific Research and Discoveries
- Combustion and Detonation Processes
- Robotic Path Planning Algorithms
- Environmental Changes in China
- Inertial Sensor and Navigation
- Manufacturing Process and Optimization
- Image Processing and 3D Reconstruction
- Infrastructure Maintenance and Monitoring
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Engineering and Material Science Research
China Academy of Space Technology
2012-2024
Nanjing University of Science and Technology
2006-2021
Institute of Physics
2020
Heilongjiang Institute of Technology
2011-2019
Nanjing University of Aeronautics and Astronautics
2018
National University of Sciences and Technology
2010
Nanjing Institute of Technology
1994
Human exploration of the Moon is associated with substantial risks to astronauts from space radiation. On surface Moon, this consists chronic exposure galactic cosmic rays and sporadic solar particle events. The interaction radiation field lunar soil leads a third component that neutral particles, i.e., neutrons gamma Lunar Lander Neutrons Dosimetry experiment aboard China's Chang'E 4 lander has made first ever measurements both charged particles on surface. We measured an average total...
Chang'E-4 (CE-4) was the first mission to accomplish goal of a successful soft landing on lunar farside. The trajectory and location site can be effectively reconstructed determined using series images obtained during descent when there were no Earth-based radio tracking telemetry data. Here we powered CE-4 photogrammetrically processed camera, navigation terrain data Chang'E-2. We confirmed that precise is 177.5991°E, 45.4446°S with an elevation -5935 m. accurately identified imagery...
Abstract Ultra-short-period (USP) planets are a rare but dynamically significant subset of the exoplanet sample, and understanding their dynamical histories migration processes is necessary to build complete picture outcomes planet formation. In this work, we present an analysis system age constraints impact tidal evolution in TOI-1937A system, component large-separation stellar binary with ambiguous constraint that hosts massive (>2 M Jup ) USP planetary companion. Through suite...
Temperature probes onboard the Chang'E-4 (CE-4) spacecraft provide first in situ regolith temperature measurements from far side of Moon. We present these with a customized thermal model and reveal particle size lunar at CE-4 landing site to be ∼15 μm on average over depth, which indicates an immature below surface. In addition, conductive component conductivity is measured as ∼1.53 × 10-3 W m-1 K-1 surface ∼8.48 depth 1 m. The bulk density ∼471 kg m-3 ∼824 upper 30 cm regolith. These...
The Chinese lunar probe Chang'E-4 successfully landed in the Von Kármán crater on far side of Moon. This paper presents topographic and geomorphological mapping their joint analysis for selecting landing site crater. A digital model (<small>DTM</small>) crater, with a spatial resolution 30 m, was generated through integrated processing Chang'E-2 images (7 m/pixel) Lunar Reconnaissance Orbiter (<small>LRO</small>) Laser Altimeter (<small>LOLA</small>) data....
Abstract Lunar dust is regarded as the most crucial environmental problem on Moon, and related research has crucially important scientific technological interests. Here, we first reported in situ measurements of lunar at Chang'E‐3 landing site northern Mare Imbrium using temperature‐controlled sticky quartz crystal microbalance. The results showed that a total deposition mass height 190 cm above surface during 12 daytimes was about 0.0065 mg/cm 2 , corresponding to an annual rate ~21.4 μg/cm...
Abstract It was suspected that the horizon glow observed over lunar terminator caused by electrostatically levitated dust particles, but do high concentrations of particles really exist terminator? This is an important question cannot be answered even today. In fact, no in situ investigations about have been conducted on surface since Apollo. Here we first report at Chang'E‐3 (CE‐3) landing site using solar cell probe (SCP). The results show that, different from Apollo's observation,...
Chang’e-4 will become the first probe which soft-land on farside of Moon, carry out in-situ and patrol exploration, transmit data back to Earth through relay satellite. Compared with lunar landing mission nearside soft-landing Moon has important scientific significance engineering challenges. In this paper, objectives are introduced, composition system outline flight described, safety complex terrain, communication, temperature acquisition in moonnight payload mainly designed.
The Queqiao communication relay satellite, as an important part in Chang’e-4 mission, relays commands and data between Earth station lander for the farside lunar landing mission. This paper introduces trajectory design method flight result of satellite. Firstly, analysis results Halo orbit is given with mission requirements constraints. Sencondly, transfer studied, including characteristics, manuever strategies Δ V budget. In end, compared predicted value.
In order to improve the precision and speed of three-dimensional point cloud registration, it is suggested registration based on ICP algorithm employing k-d tree optimization in this paper. First all, centre superposition method adopted realize coarse then traditional where K-D used quickly search closest pair points enhance registration. Finally Three dimensional completed precisely. The overcomes defects using Euclidean distance determine which time-consuming plains lots work. On basis...
Lunar polar exploration is a strategic point to for all space powers compete with each other. Based on the brief summary of development lunar in domestic and globe, main scientific technical issues that need be solved are studied analyzed order provide reference China’s future exploration.
Chang'e-4 probe is planned to land on the farside of moon for first time human being. Compared nearside moon, terrain rugged and complex, there no large flat area, so change will affect soft-landing Chang'e-4. The landing site South-Pole Aitken Basin analyzed compared wth area Chang'e-3 mission, considering influences ofthe mission design, lander design lunar working procedure. main conclusions are as follows:1) latitude longitude range reduced from 16.4° 3° about 4° 2° mission; 2) During...
Abstract The free gas evolved in the pump chamber results a low rod working efficiency, and it can even lead to failure. A common effective solution is install downhole separator before fluid entering chamber, which divert annulus. If we re-inject diverted back tubing at shallower depth above pump, flowing then re-combined with liquid decreases density. Consequently, injected also creates additional lifting drive for liquid. new technology based on this concept has been developed called...
<p indent="0mm">The Chang’e-4 lander has completed the first full cycle measurement of lunar soil temperature in South Pole-Aitken basin on far side Moon. This paper introduces theory and implementation measuring shallow layer lander, as well results three days orbit preliminary analysis. The is outfitted with points that can be buried at end transfer mechanism. surface also a good view surface. Furthermore, comparison was made between measured low data during night phase calculated based...
To gain an insight into the ejecting behavior of granular materials under impact conditions is vital important for asteroid sampling and defense. During penetrate stages, interaction between projectile target controls impact-induced ejecta behavior. However, correlation nose shape formation expansion characteristics remains unclear. In this study, vertical launch system high-speed camera were conducted to carry out experiments on sand at 100 m/s. The variations parameters induced by...