At the beginning of 2022, the State Key Laboratory of Robotics and Systems of Harbin Institute of Technology, Beijing Aerospace Flight Control Center, State Key Laboratory of Remote Sensing Science of Institute of Aerospace Information Research of Chinese Academy of Sciences, China Academy of Space Technology, Ryerson University of Canada and other units cooperated to publish "A 2-year locomotive exploration and" in the internationally renowned academic journal "Science Robotics" scientificinvestigation of the lunar farside by the Yutu-2 rover" cover paper.
Figure 1 Trajectory of the "Jade Rabbit" 2 lunar rover (Cover of Science Robotics Magazine)
The team estimated the mechanical properties of the lunar soil based on the information on the action of the lunar rover wheels and the surface of the moon and the ground mechanical model, and the results showed that the pressure bearing characteristics of the weathering layer of the lunar soil were similar to those of dry sand and sand loam on The Earth, and had stronger pressure bearing characteristics than the typical lunar soil in the Apollo program of the United States. In the images of several different locations, it was observed that the wheels of "Yutu-2" were adhered to large clumps of soil, while the wheels of "Yutu" were basically free of clay, indicating that the lunar soil near the Landing Area of Chang'e-4 was more cohesive, which may be due to the inclusion of a higher proportion of agglutinites, making soil particles more likely to reunite by wheel rolling.
Figure 2 Analysis of the physical and mechanical properties of lunar soil based on the interaction between the "Yutu" No. 2 wheel and the ground
Figure 3 Impact craters and rocks discovered by the "Yutu-2" observation
At present, Chang'e-4 is on the night of the 41st month, the lunar rover has a moving range of 1142.39 meters, and the two instruments and one satellite are in good condition.
Source China Lunar Exploration Project
Edited by Shanshan Gao
Process Editor Liu Weili