On February 2, 65438, the combination of Chang 'e-5 lander and elevator completed the lunar drilling, sampling and packaging. .
On February 2, 65438, Chang 'e V completed the automatic sampling and packaging of the lunar surface.
On February 3, 65438, Chang 'e V sent samples into orbit around the moon.
On February 6, 65438, Chang 'e V elevator rendezvous and docked with the combination of orbiter and returner, and transferred the sample container to the returner.
65438+February 6 12: 35, the combination of the orbiter and the returner of Chang 'e V separated from the riser, and entered the waiting stage around the moon, ready to return to the earth at the right time.
On February 8, 65438, Chang 'e V elevator was derailed and landed at the scheduled landing site. .
65438+February 65438+February, the combination of Chang 'e V orbiter and returner made the first transfer event around the moon.
12 16, Chang 'e V successfully completed the second lunar transfer orbit correction? .
12 17 in the early morning, the Chang' e-5 returner landed on the earth with lunar samples.
Extended data:
Chang 'e V mainly faces four technical problems: sampling, ascent, docking and high-speed reentry. At the same time, the system design of Chang 'e V faces five major challenges.
The first is "many separation surfaces". Compared with shenzhou spaceship and Chang 'e III, it only needs to separate two parts, that is, two separation surfaces. Chang 'e V has five separation surfaces, namely, orbiter and lander assembly, lander and riser assembly, orbiter and returner assembly, orbiter and support cabin, orbiter and docking support. These parting surfaces must be "successful once".
The second is "complex mode". The detector needs to go through multiple flight stages, and also needs to complete key links such as lunar sampling, lunar takeoff and ascent, lunar orbit rendezvous and docking, sample transfer, high-speed re-entry and landing of the earth's atmosphere, and there are many design constraints. Among them, the elevator and orbiter need to dock in the lunar orbit 380 thousand kilometers away from the earth, where the rendezvous and docking can not be realized by satellite navigation, but by the detector itself.
The third is "harsh details". In order to obtain lunar soil samples, the unmanned sampler Chang 'e-5 will go deep into the interior of the moon through the sampling bit, and sample the lunar surface through the sampling manipulator, and then transfer the samples to the riser, which will be docked with the orbiter, and finally transfer the samples to the returner. The whole process must be accurate.
The fourth is "temperature control". The temperature on the surface of the moon is about 180 degrees Celsius during the day, about 150 degrees Celsius at night, and the temperature difference between day and night is about 330 degrees Celsius. In addition, the ignition of the elevator engine instantly reaches thousands of degrees Celsius. How to avoid burning elevators and landers poses a challenge to the development team.
The fifth is "slimming pressure". The carrying capacity of the launch vehicle has strict constraints on the weight of the Chang 'e-5 probe. On the one hand, we should "slim down" the subsystem as much as possible. On the other hand, due to the lack of backup products, it is necessary to ensure reliable quality.
References:
Baidu encyclopedia-Chang 'e No.5