official announcement!Shenzhou 18 search and rescue tasks conducted the last full system comprehensive exercise. All the search and rescue power and equipment and equipment of Dongfeng landing field were in a good state. All preparations were ready. They had the conditions to perform search and rescue tasks.The staff rides triumph.
So, Shenzhou 18 astronauts have entered the return countdown, which is worth looking forward to.
Of course, before returning, Shenzhou 18 astronaut Ye Guangfu, Li Cong, Li Guangsu and Shenzhou 19 astronauts Cai Xuzhe, Song Lingdong EastWang Haoge is still being transferred on the track mission. Lets show the transfer of transfer first, and then explain the problem about returning.
6 astronauts of China Space Station fly with each other. What tasks are you transfer?
Indeed, it is a rare situation for 6 astronauts to fly with each other.The situation.
In the process of flying synchronous flights, what are the main transfer tasks?
First, For Shenzhou 18th astronauts multiplication group, during the task of implementing the Chinese space station, it can be said that many technologies have been learned. And these technologies are also helpful for the development of my countrys space station in the future.
At the same time, for the Shenzhou 19th astronauts multiplication group, there may also be some needed technologies, such as the improvement of space protection measures, these technologies can be transferred, and these technologies can be transferred.Then let the Shenzhou 19th astronauts be able to get started quickly when performing the same type of task.
Second, During the period of the supplies that transfer space in my country Class, transportation to the freight ship, how much materials are left, and need to be transferred to the Shenzhou 19th multiplication group. Of course, these handover materials also include the third point.
Third, experiment, etc.For a long time, the experiment that cannot be interrupted, this transfer is important.
In addition, there are space key transfer, etc. These are what Shenzhou 18, Shenzhou 19 astronauts multiplying on the track to hand over.
After the transfer is completed, Shenzhou 18 astronauts returned to Dongfeng landing.
And I also told you before that the entire transfer task time is about 5 days, so the Shenzhou 18th astronaut multiplication group can determine the return time.
Shenzhou 18 return time is determined!How difficult is it to search and rescue at night?
Yes, the return time of Shenzhou 18 astronauts is determined. According to time, it is expected to return to Dongfeng landing on November 4th, butIt is not convenient to disclose the specific time here. At most, it is to explain that it is in the early morning, and everyone is based on the aerospace center.
and the preparation of Dongfeng landing fields released from my country, many people should also see when The difficulty of the task is under dark and low temperature conditions. The target search finds difficult, the reaching the landing site is difficult, and the protection requirements at the rescue site are high.
What does this indicate?That is, this time the Shenzhou 18th astronauts multiplied by the group at night, the difficulty is definitely not small.
However, they also pointedMaterials.
Simultaneous dispatch of medical and supervision and medical insurance vehicles to ensure that under low temperature conditions can also provide a venue for medical supervision and supervision and medical insurance.
So, the return time of Shenzhou 18 is determined, which is executed at night, which also shows that it is difficult, which is the Dongfeng of my country. For the search and rescue personnel of the landing, it is also a difficult challenge.
It also mentioned that my country has also performed night mission before, that is, in Shenzhou 14th astronaut multiplication group, my country has also made a layout in this regard, which also shows that it also shows that it also shows that it also shows that it also shows The problem is not big, after all, it is not the first time that this task is.
So, I believe that my countrys search and rescue personnel can perfectly perform the entire search and rescue task. Lets look forward to the return of Shenzhou 18 astronauts.
Although it is not difficult to challenge at night, my country has publicly announced that all Dongfeng landing fields are ready, then there is no problem at all, everyone can rest assured.
Really this task is that when many friends wake up, Shenzhou 19 manned spacecraft has successfully launched.
Next, when they wake up, the Shenzhou 18th astronauts in my country returned to the Dongfeng landing field. This is the strange point of the point. Essence
What will the astronauts face during the return process?
There are indeed a lot of challenges for the return process of the astronauts. They will go through the stage of separation, braking, re -entry, deceleration, and landing.It is also aimed at our technology again.
But for my countrys strong aerospace technology, these challenges can be said When the astronauts returned, when they experienced this process again, there was nothing.
I will explain the adjustment process here, nothing else.
But in terms of comprehensive, it is mainly divided into a better explanation of 4 major stages.
In the first stage, separation and braking phase, after the spacecraft is separated from the space station combination, a few laps will enter the background process.
After, the rail compartment located in the front section is separated from the return compartment propulsion compartment in the middle section.The circular orbit of nearly 400 kilometers became an elliptical rail with a nearly place below 100 kilometers. Subsequently, it was separated from the back cabin and the return capsule.
The second stage, the re-entry stage, before the spacecraft enters the again, the mobility on the cabin will be adjusted to the background to the large outlet.The front -to -flat state is re -entered by lift control.
In the process of re -incorporation, the return compartment and the atmosphere air fierce friction, forming a plasma area that wraps the return capsule, causing the signal between the ground and the cabin to interrupt.In the process of "black barriers", in this process, the ground cannot control the spacecraft through any remote control method, and rely on the aircraft to fully process it.
The third stage, the deceleration stage, when the spacecraft is about 40 kilometers from the ground, the spacecraft has basically separated from the "black barrier area".
The static pressure height controller is installed on the return capsule to determine the height of the atmosphere by measuring the atmospheric pressure.A signal, guiding umbrellas, deceleration umbrellas and main umbrellas one after another.
In addition, in order to prevent the deceleration umbrella and the main umbrella open the momentary power, it will be in a half -opening state when the umbrella is opened, and it will be completely opened after a few seconds of work.
At the same time, in order to ensure the safety of the lives of the astronauts and improve the reliability and security of the recycling landing system, a backup of a backup parachute is also equipped on the return compartment.Once the spacecraft detects the failure, it will be switched to the plain parachute working state according to the predetermined program.
In the fourth stage, the landing buffer stage, thermal anti -thermal material on the anti -thermal outsole and the side wall is the "armor" after the spacecraft enters the atmosphere.The cabin will throw off this "armor". The gamma height control device starts to work. By launching gamma rays, the real -time measuring distance is height.
When the return compartment drops to a height of 1 meter from the ground, the bottom gamma height control device issues a ignition signal, 4 on the cabinReverse the engine ignition, generating a upward impulse, so that the landing speed of the return capsule reaches 1-2 meters/s.
At the same time, the astronaut seats that install the buffer device will start to rise before landing, so that the impact energy will be cushioned and absorbed, fully ensuring the comfort of the astronauts landing.
So, these challenges look simple, but the process of execution is still more complicated. Each step is indispensable, and it must be accurate. This is the rough situation.
