Requesting a composition for Shenzhou 7

Unlike the "Shenzhou 5" and "Shenzhou 6", the key points in the development of the "Shenzhou" 7 rocket are the spacesuit and valve brake. Because "Shenzhou" 7 will perform a space walk, the air valve and spacesuit will play an important role in whether the astronauts can suddenly adapt to the vacuum environment from the cabin air pressure.

The spacewalk during "Shenzhou 7" has higher requirements for astronauts' assessment. Since the pressure inside the space suit is lower than normal, it is possible that nitrogen in human tissues will be released, which will increase in the blood vessels. Air embolism is formed, causing decompression sickness and even endangering human life. Therefore, after putting on the spacesuit, the astronauts must fully absorb oxygen in the airlock cabin and assist the working astronauts in returning to the inner cabin (i.e., the orbital cabin). After closing the inner cabin door, the airlock begins to depressurize to a vacuum, which is consistent with the vacuum state outside the spacecraft. At this time, the astronauts can leave the cabin and return to the cabin after completing the extravehicular mission. Decompress to a certain extent and then inflate the airlock.

“Astronauts’ extravehicular activities are a difficult and high-risk activity. According to experts, the spacewalk during the "Shenzhou 7" requires astronauts to conduct sufficient tests and training on the ground. The ground training is usually conducted in a neutral pool with certain specific gravity requirements. This kind of pool is usually built in In a large test room, the spacecraft is placed in a pool to use the buoyancy of water to simulate the weightlessness phenomenon in space, and then the astronauts conduct entry and exit and extravehicular operation training in the pool.

Experts said, " "Shenzhou 7" will have several necessary conditions for astronauts to spacewalk. First of all, it will provide the environment and conditions for astronauts to live and work outside the vehicle. The most important of these is the extravehicular space suit, which has anti-micrometeor, It has multiple functions such as vacuum heat insulation shielding, air sealing, pressure maintaining, ventilation, and temperature regulation. The gloves of the space suit are both sealed and flexible, and the helmet is transparent and sealed. Secondly, the out-of-vehicle backpack has a control system and communication system, and the control system is equipped with it. The jet device allows astronauts to control the walking direction. It is reported that the space suit and backpack are complex in structure, technically difficult and expensive. A set of space suits produced in the United States costs about 1.5 million US dollars. The third, of course, is the need for technical operation. Skilled, physically healthy, and mentally stable astronauts

In order to adapt to the vacuum environment, the "Shenzhou" 7 spacecraft has to be equipped with airtightness, communication, excretion, communication, power supply, movable joints and other aspects. It is much improved than the "Shenzhou 6".

At the time of the "Shenzhou 5", my country's manned spaceflight was only an assessment of one person going into space in one day. At that time, Yang Liwei only stayed in the return capsule and orbited. The cabin door is closed. Although the "Shenzhou 6" is almost the same in appearance as the "Shenzhou 5", the difference is that the two astronauts will enter the orbital module from the return capsule to engage in multi-person missions. The experts used a vivid metaphor: "Two astronauts are operating in a 'one room and one hall'." "When it comes to "Shenzhou 7", in addition to activities in the "one room and one hall", the astronauts will also go out of the "hall" and come out of the window on the side of the orbital module to walk in space. "Shenzhou 7" has a great impact on the lives of the astronauts. The support system, evacuation equipment, and structural air tightness requirements are higher, so the appearance of "Shenzhou 7" will be significantly different from that of "Shenzhou 6", and related systems will also be changed, especially the orbital module.

Usually after the spacecraft is launched into space, astronauts will first conduct 2-3 hours of adaptive preparation in the airlock before conducting extravehicular activities, and put on extravehicular space suits in the airlock. , put on your backpack and bring your supplies. The spacesuit worn by astronauts performing spacewalks is bulky and weighs 125 kilograms on the ground. It is not as easy as putting on clothes and hats on the ground. They must be helped by other astronauts. Put it on. "So there will be at least two astronauts in the sky during the 'Shenzhou 7', so that they can cooperate with each other. As for how many people will go out of the spacecraft, it is not determined. It is estimated that one person will conduct a space walk. ”

There will be three astronauts on Shenzhou 7. One will go out of the cabin to walk, one will greet him in the orbital module, and there will be one person left in the return module. The out-of-vehicle activities will include installation equipment such as walking, operating, and tightening screws. and other projects to prepare for the establishment of a space station in the future.

China will implement the "Shenzhou 7" manned space mission in the second half of this year. Currently, various preparations are proceeding as planned. It is reported that the "Shenzhou VII" flight will achieve a number of major technological breakthroughs. First, the number of astronauts will increase to three; second, it will realize the first space walk by Chinese astronauts; third, it will choose the opportunity after the spacecraft enters the predetermined orbit. Release a small accompanying satellite (herein referred to as "companion satellite"), and so on.

What can a "companion star" do? According to Hong Kong's "Ta Kung Pao" report, the mission of this "companion star" is to use a CCD stereo camera to take close-up photos of the "Shenzhou VII" flying in orbit. At that time, we will obtain the first three-dimensional exterior photo of a Chinese spacecraft flying in orbit. This photo uses space as the background to show the unique scenery of the high-speed operation of the "Shenzhou VII" and will become a permanent historical witness of the Chinese nation's space flight.

Did "Shenzhou VII" just bring a mechanical "photographer" into space? Haha, of course not!

Prior to this, China has successfully launched several small satellites. The technology of small satellites has reached maturity. The significance of "Shenzhou VII" carrying "companion stars" into space is even more significant.

First of all, there are changes in the means of small satellite delivery. In the past, China's small satellites were launched into orbit by launch vehicles; this time, the small satellites were placed at the front of the "Shenzhou 7" orbital module. When the spacecraft entered the predetermined orbit, it could automatically eject the spacecraft according to instructions, or The astronauts can manually "select the opportunity" to release, and the delivery method is more flexible. The "select the opportunity" release means that it can be released whenever they want according to needs.

Secondly, the "companion star" can be used as a reconnaissance satellite. Hong Kong media revealed that the "companion star" carried by "Shenzhou VII" is equipped with a CCD stereo camera similar to that of "Chang'e 1", which can capture high-definition surface images. The "companion star" will be released into orbit by the "Shenzhou 7" at the opportunity to take photos and reconnaissance of the surface of interest.

Third, the "companion star" can become a very terrifying space weapon. It can be released by the spacecraft at the right time to carry out the mission of attacking enemy space targets; it is also the most powerful and loyal "bodyguard" of our spaceship - when the enemy launches an attack on our spacecraft, our spacecraft can release the "companion star" in a timely manner , use the weapons you carry to destroy enemy attacking weapons or die with them.

Carrying the expectations of 1.3 billion Chinese people and facing the attention of the world, at 21:10 on the 25th, the Shenzhou 7 manned spacecraft was launched. This is another surprise that China has given the world in the extraordinary year of 2008, and it is also another shining light of the Chinese nation’s spirit of self-improvement.

Just after entering 2008, some areas in southern my country suffered from a rare rain, snow and freezing disaster. Under the strong leadership and strong command of the Party Central Committee and the State Council, we carried forward the national spirit of constant self-improvement and overcame difficulties. This disaster has just receded, but the Wenchuan Earthquake has caused the entire country and nation to face unprecedented challenges in history. Beautiful homes in the disaster area were instantly destroyed, tens of thousands of compatriots lost their lives, and many difficulties are before us. It is the national spirit of constant self-improvement that once again allowed us to stand up unyieldingly and compose a heroic epic of earthquake relief and disaster relief that moved the world and moved the mountains and rivers.

People still have an unforgettable memory. The Beijing Olympic and Paralympic Games torches burning over the "Bird's Nest" in Beijing have lit up the beacon for the world to experience the splendid five thousand years of Chinese civilization, attracting people from more than 200 countries and regions. Players come together for "one world, one dream". The Olympic spirit of athletes from all over the world pursuing "faster, higher, stronger" has been sublimated in Beijing, complementing the Chinese nation's spirit of continuous self-improvement, leaving precious spiritual wealth for the world Olympic movement and the Chinese nation. [www.gwdq.cn Collection of official documents]

At this moment, the Shenzhou 7 manned spacecraft is traveling in space, and the astronauts are preparing to carry out a space walk. Every move of the three astronauts always affects the hearts of the people across the country, and their steps to explore the mysteries of the universe attract the attention of the whole world. The brilliant achievements of my country's aerospace industry come from the persistent pursuit and unremitting efforts of several generations of Chinese astronauts over more than 50 years of self-reliance and hard work. They are also the fruitful results of the national spirit of self-improvement and the scientific spirit.

From earthquake relief, the success of the Beijing Olympics to the Seven Flying Gods, whether it is facing the severe test of natural disasters or new issues and challenges brought about by the development of human society, the world can always learn from the Chinese The same answer is that the national spirit of constant self-improvement is the development and innovation of constantly surpassing oneself based on the national spirit.

In this golden autumn, in September 2008, the launch horn sounded again. We look forward to the footsteps of Chinese astronauts stepping into the vast space, and Shenzhou 7 will shine brightly on the new historical coordinates of China's aerospace industry.

The first human being in the world to attempt the dream of flying was a Chinese - Wan Hu, a scholar-bureaucrat of the Ming Dynasty more than 600 years ago. He sat on a chair with 47 homemade rockets tied to it, holding a large kite with both hands. . Think about using rocket thrust to fly into the sky and then landing using a flying kite. Although his life turned into a wisp of smoke with the roar, his name is recorded at the starting point of mankind's dream of flying into the sky.

600 years later, generations of astronauts in New China have overcome obstacles one after another on the road to space, turning the dreams of their ancestors into reality. Every magnificent takeoff is held up by the Chinese nation's dream of flying into the sky.

The reason why take-off is magnificent is because the realization process is extremely difficult.

Looking back at New China’s aerospace journey, while other countries have entered the space era, our country has just been born 10 years ago.

At that time, if there were no large computers, we would use hand-cranked computers; if there were no desks, we would lie on the ground and draw pictures with the dim candlelight and flashlight light..."If you are hungry, you will eat gravel rice, if you are thirsty, you will drink. "Bitter slurry." General Zhang Aiping once described the "two bombs" development base in the northwest.

This is how the older generation of astronauts created breakthroughs in atomic bomb, hydrogen bomb, and artificial satellite technology, laying the foundation for realizing the dream of flying into space. The passionate 1960s and 1970s forged our own "two bombs and one satellite"!

And the developed countries in aerospace are even further ahead of our country. In April 1961, the Vostok 1 spacecraft carried 27-year-old former Soviet Air Force Major Gagarin on a 108-minute space journey. This was the first manned space flight in human history. 23 days later, the United States also Send astronauts into space.

Therefore, when China successfully launched its first artificial earth satellite, Dongfanghong, into the sky on April 24, 1970, the music "Dongfanghong" that resounded around the world announced that China had also Entered the space age. The whole country is excited and enthusiastic!

However, no matter in terms of economic foundation or industrial design and manufacturing level, China at that time was far from having the conditions to carry out manned spaceflight.

We must face the fact that a country with poor national strength cannot support a major space country! Japan and China, which are becoming increasingly powerful during the reform and opening up, are also accumulating the power to achieve flying.

Aerospace technology and space exploration are important indicators of a country’s comprehensive national strength and have a strategic impact on a country’s political, economic, military, scientific and technological development. In order to firmly seize the initiative in the fierce international competition, in 1992, the Party Central Committee decisively launched the manned space project, announcing to the world the clarion call for the Chinese to enter the most challenging field of aerospace technology.

From now on, move forward! Forward! Forward! The world has heard the determination of Chinese astronauts to catch up.

From now on, fly to the sky! Flying! Flying! Chinese astronauts have completed magnificent journeys in space.

On the desolate Gobi Desert, the aerospace city towers into the clouds;

The vast prairie echoes with the heroism and passion of the Shenzhou spacecraft’s sixth triumph...

In more than ten years, the Chinese have accomplished what other countries have achieved in decades: China has not only become the third country in the world to independently master manned spaceflight technology, but also the third country in the world to be able to independently conduct manned spaceflight missions. The country of space science experiments.

"No matter who goes to heaven - whether it's me for the first time or Junlong and Haisheng this time, we all go to heaven together." This was Yang Liwei's sincere words after the successful launch of Shenzhou-6 expression.

From Shenzhou 1 to Shenzhou 6, from unmanned to manned, from one day to many days...the changes in numbers mark a big step in the progress of manned spaceflight.

It is the glorious practice of Chinese astronauts that has created great achievements for our country and our nation