After about 7.5 hours of out-of-cabin activities, Shenzhou-17 astronauts Tang Hongbo, Tang Shengjie, and Jiang Xinlin worked closely together, with the cooperation and support of the space station's robotic arm and ground scientific researchers.
Astronauts Tang Hongbo and Tang Shengjie have safely returned to the Wentian experimental module, and the out-of-cabin activities have been a complete success.
However, there may be such a question, the Shenzhou 17 astronauts appeared to carry out the maintenance of the solar wing of the Chinese space station, which can be called "thrilling", obviously the Chinese space station has a "large and small robotic arm", the strength is outstanding, why can't the Chinese space station be repaired directly?
This seems to make many people a little overwhelmed: What can capture visiting hovering vehicles, transfer cargo spacecraft loads, and so on, are all "stunts" of the robotic arm of China's space station.
Therefore, seeing such strength, it should indeed be able to carry out space station missions, so why can't it be executed?
China's space station was hit, and the Shenzhou-17 astronauts went out of the capsule in a thrilling way
Indeed, the impact on the solar wing of China's space station was publicly stated by the mainland when the Shenzhou-17 manned spacecraft mission was carried out. That is, in the long-term operation of China's space station, it is inevitable to encounter the impact of space junk.
During the preliminary inspection of the space station on the mainland, it was found that the solar wings of the space station were also hit by tiny particles in space many times, causing minor damage.
Although it has not affected the stable operation of China's space station, from the perspective of long-term space station operation and verification of technical capabilities, the mainland Shenzhou-17 is to be repaired.
However, this is indeed a challenge for the Shenzhou 17 astronauts, and in the out-of-cabin activities, it is really "thrilling", why do you say that?
As we all know, in space, there are many problems, when astronauts go out of the capsule, they will lose this layer of "protection measures" of the space station, although astronauts out of the capsule also wear extravehicular spacesuits, but due to the lack of bulkhead protection, astronauts face complex and variable temperature, pressure and radiation challenges outside the capsule.
Therefore, in fact, the danger of out-of-cabin activities is extremely high, and it is necessary to be cautious.
Many people may not know that during the Shenzhou 12 mission on the mainland, there was a "nervous" scene, that is, when Liu Boming, an astronaut of the Shenzhou 12 spacecraft, came out of the capsule, he suddenly received a ground command 02, which was an emergency and called the astronauts to quickly enter the Chinese space station.
And don't have any waiting, not even the tools need to be placed perfectly, when the instructions are executed, the direct instructions are to temporarily place the foot limiter at the hatch and go back quickly.
So, this command shows the high-risk nature of the spacewalk mission, so what happened at that time? It was because the ground detected abnormal radiation values in the area near the astronauts, so the astronauts were called to return urgently.
Because the Chinese space station module has a multi-layer protective structure, which can shield most of the dangerous radiation, the commander asked the astronauts to return to the capsule as soon as possible to take refuge, and after the abnormal radiation dissipates, Liu Boming went out of the capsule again and installed the foot limiter on the equipment interface on the outer surface of the node cabin, and successfully completed the relevant tasks.
Every mission out of the cabin is "thrilling", requiring the perfect cooperation of the personnel of heaven and earth, and avoiding all possible problems, which is the problem that many people say "the right time and place are right", and this is the general situation.
However, for Shenzhou 17 astronauts Tang Hongbo, Tang Shengjie, and Jiang Xinlin, various problems may also exist.
The robotic arm can grasp the aircraft, why can't the solar wing be repaired?
Indeed, the robotic arm of China's space station is very powerful, which is the most intelligent, difficult and complex space intelligent manufacturing system in the mainland, and the most realistic restoration of the human arm.
It integrates mechanical, electronic, thermal control, vision, dynamics and other disciplines, with powerful performance and broad application prospects, and is a well-deserved "all-rounder" in space.
China's space station has two robotic arms, the core module of the space station robotic arm is called the "big robotic arm", is the continent's first long-term space orbit robotic arm, composed of two arms, corresponding to the human body's big arm and small arm, the two arms can be deployed up to 10.2 meters in length.
Like a human arm, it has seven degrees of freedom of movement, and through the rotation structure, it can grasp and operate at any angle and position in front of it, backward, left and right.
The small robotic arm is an airlock extravehicular robotic arm located in the Wentian experimental module of the Chinese space station, with a length of 5 meters, but the position accuracy of the small robotic arm is 5 times that of the large arm, and the attitude accuracy is 2 times that of the large arm, which is a more dexterous and accurate robotic arm.
At the same time, the two robotic arms can be used not only separately, but also together, and the combined robotic arm is up to 15 meters long, which is enough to cover the range of the three main modules of the space station.
Therefore, for the Chinese space station, it is really a "space station all-rounder", which can do many tasks, such as: it can support extravehicular status inspection, extravehicular cargo transfer and installation, extravehicular maintenance and repair and other tasks, and can also capture visiting hovering vehicles, etc., so the power of the robotic arm is very clear.
Isn't it puzzling that the above says that it can be "repaired outside the vehicular system"? It has this function, isn't it? Why do mainland astronauts risk their lives to carry out such a difficult task?
In fact, there is no need to wonder, although the robotic arm of the Chinese space station is very powerful, it does not mean that it can completely solve all problems.
This is a regrettable problem, that is, robots and other automated equipment cannot completely replace astronauts to perform extravehicular tasks, so it is imperative for astronauts to go out of the capsule.
Of course, this is not to say that it is "useless", because when Chinese astronauts are active outside the cabin, the robotic arm can also play a supporting role, as mentioned above, the Shenzhou 17 astronauts can complete the task perfectly, and it is indispensable, now you understand, right?
To put it bluntly, there is one point - that is, although the robotic arm is very powerful, it cannot perform all tasks, and it cannot be solved 100%.
And this is not only a problem faced by the Chinese space station, but also the International Space Station, which often goes out to repair the space station.
It's just that many people may think that the robotic arm may be too strong, and it is magnified several times, and it is omnipotent, so there is such a "doubt".
It is good to go out of the cabin and pave the way for the future
Indeed, this time, the extravehicular repair mission of the astronauts of the Shenzhou-17 manned spacecraft can be regarded as paving the way for the future continental space station.
This mission is a good "real-combat" experience accumulation, and after the perfect completion of the mission, it can improve the continent's technology in space station maintenance.
In the future, after the continental space station is upgraded to six cabins, it will be more convenient to perform the same task, and it can also be solved quickly and easily.
Therefore, for the Shenzhou 17 astronauts to carry out the mission, say that it is hard work.
Once again, congratulations to the Shenzhou-17 astronaut crew for successfully completing the first out-of-cabin activity, and completing the most difficult mission in China's space history for the first time, and perfectly executing the mission in an extreme environment.
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