From 18:10 on December 26, 2021 to 0:55 on December 27, 2021, the astronauts of the Chinese space station carried out another mission out of the capsule, astronaut Ye Guangfu moved to the mission position by mechanical arm, and astronaut Zhai Zhigang moved freely to the mission position through the bulkhead handrail.
The time out of the capsule is more than 6 hours, the main task is to add a 20 cm long bracket to the panoramic camera C located under the small column segment, expand the field of view of the panoramic camera C, and then re-verify the performance of a variety of scientific equipment, flying spacesuits, large robotic arms, etc.
This is the first time that Chinese astronaut Ye Guangfu has left the capsule, the second time that the Shenzhou 13 astronauts have left the capsule, the fourth time since the Chinese space station entered orbit, and the last time that Chinese have left the capsule in 2021.
Chinese astronauts live up to expectations, Zhai Zhigang and Ye Guangfu once again completed the task of leaving the capsule excellently, a number of media have broadcast the process of leaving the capsule live, if you have not seen enough, there will be more outgoing activities in 2022, we just need to wait and see.
Have you found that the Chinese space station astronauts use advanced robotic arms every time they go out of the capsule, 4 times the capsule robot arm is used 4 times, in November 2021, the "Ren Dou Second Pulse" of the Chinese space station has been passed, and now the mechanical arm is still the final test.
There are actually two Chinese space station robotic arms, one is a large robotic arm, the other is a small robotic arm, the design life is 10 years, 10 years life can fully meet the needs of China's space station construction, besides, the actual service life is far beyond the design life.
Now, the large robotic arm is operating on the core module of Tianhe, the main mechanical arm of the Chinese space station, weighing more than 700 kilograms, the arm length is 10.2 meters, the large mechanical arm is composed of three shoulder joints, an elbow Liu joint and three wrist joints, two stations plus two end effectors.
Adopting the "3 shoulders + 1 elbow + 3 wrists" structure, the large robotic arm has 7 degrees of freedom, which can be accurately transferred to any task position, safe and without dead angles, and the end transfer speed is 0.3 m/s. In order to prevent the robotic arm from colliding with the object, each joint has an extremely sensitive tactile nerve.
Don't look at the total weight of the Chinese space station's large robotic arm is only more than 700 kilograms, but its maximum load is 25 tons, that is, even if it is placed on the ground, it can lift an object weighing 25 tons after powering.
The use of the big robotic arm is too much, you can crawl around on the outer wall of the space station like a caterpillar, where there is an end effector interface, the big robotic arm can come to wherever it goes.
The large robotic arm can send astronauts and the scientific instruments they carry to designated locations, and can also carry out extravehicular cargo handling, and even carry out "space transfer" and replace astronauts for extravehicular operations.
Shenzhou 13 astronauts will return to the ground in mid-April 2022, and when Shenzhou 13 is separated from the Tianhe core module, the big robot arm will carry out one of the most complex technical tests since liftoff - the "space transfer" experiment, transferring the Tianzhou 2 cargo spacecraft from one pair to another.
At present, the Tianzhou 2 cargo spacecraft is located on the forward interface of the Tianhe core module, and the large mechanical arm will likely transfer the Tianzhou 2 to the interface below the Tianhe core module, and the "space transfer" operation is mainly completed by the large mechanical arm, and the Tianzhou 2 cargo spacecraft does not need to start the engine system.
The "space transfer" experiment is the last technical test of the big mechanical arm, after passing the test, the Tianhe core module will usher in the Tianzhou 4 cargo spacecraft, and the large mechanical arm will also wait to ask the Tiantian experimental module and the Dream Experiment Module, as well as its "little brother" small mechanical arm.
The small robot arm is about 5 meters long, which can work independently or be connected to a whole with a 10-meter long large robot arm, just like the Transformers, forming a longer mechanical arm, and the traction distance can be extended to 15 meters at once, which greatly increases the range of motion of the robot arm.
On November 7, 2021, the main task of the Shenzhou 13 astronauts out of the capsule was to install a cascade device for large and small robotic arms on the small column segment.
After the cascade device is installed, the large robotic arm can go to the Wentian Experimental Cabin and the Dream Experiment Cabin through the cascading device, and the small mechanical arm on the experimental chamber can come to the Tianhe Core Cabin through the cascading device, and the large and small robotic arms can also form a larger mechanical arm through the cascading device.
Some people have compared the installation of cascading devices on the Chinese space station to open up the "second pulse of Ren Dou", this metaphor is really too appropriate, with the cascade device, the size of the mechanical arm can come to a "double sword combination", then the function of the Chinese space station is more powerful. Interesting and informative scientific content, please pay attention to the only WeChat public account: Interesting Exploration