If you want to choose the most concerned about the country, then the upcoming launch of the "Shenzhou VI" can definitely be elected. In yesterday's "flying into space --- China manned (Nanjing)" exhibition, Nanjing, several space experts to the reporter to disclose on the "Shen6" The exhibition was held at the "Flying into Space - China's manned (Nanjing)" exhibition.
Many of the materials for "Shenzhou VI" came from Nanjing
Chen Meng, former chairman of the Nanjing Chenguang Group, said they were responsible for the piping system and fuel-filling system of Shenzhou VI this time. Because the capsule space itself is very small, leaving the place to put the pipeline is naturally very limited, the spacecraft on the installation of a variety of tubes are very dense, it is not possible to use the ground pipeline materials and connections, researchers through years of effort to develop a tube has a soft and easy to connect the characteristics of the space can be completely adapted to the requirements of the narrow space. Chen Meng brindled also said, Chenguang Group for spacecraft piping system research has continued for decades, China's production of rockets on the first tube is their production. In addition, the radar and recovery system for Shenzhou VI and the optical instruments on the spacecraft were also produced in Nanjing.
To the "Shenzhou" spacecraft with "air conditioning"
While everything about "Shenzhou" is still a state secret, Prof. Wang Lirong of Nanjing University of Aeronautics and Astronautics revealed to reporters that the "Shenzhou" spacecraft has been equipped with "air-conditioning". Prof. Wang Lirong still to the reporter revealed some details: "God six" will carry two astronauts in the sky to stay 5 days, people for a long time in so small space capsule will emit a lot of heat, which will make the cabin temperature rises, the instrument and astronauts have a certain impact. For this reason, experts for the "God six" installed an environmental control system, like a room with air conditioning, can absorb heat, to maintain a constant temperature in the cabin.
Two parachutes for safe landing
Professor Wang said the return of the spacecraft is to get out of the original orbit in space, but exactly where to get out of the orbit requires precise calculations. This is mainly manipulated by the ground control system, if the ground control fails, then the spacecraft is likely to land in a lake or even a more dangerous place.
In addition, the return capsule will "carry" a large parachute when it lands, but because the landing speed is too fast, the parachute is very large, so in the short period of time when the parachute is open, the astronauts in the return capsule will be subjected to the acceleration of gravity will be as high as 3-4 G, which is several times the weight of the spacecraft, and will have a significant impact on the astronauts. This force is several times the weight of the spacecraft, which will be harmful to the astronauts and the instruments in the capsule. For this reason, the experts designed two umbrellas, first open a small umbrella when landing, to reduce the speed of some first, and then open the large umbrella.
Experts detailed Shenzhou VI and the ground to keep in touch with a variety of control systems
Reportedly, as soon as the middle of next month, the two astronauts will carry "Shenzhou VI" for nearly five days of space travel. During this time, how will the spacecraft keep in touch with the ground? Undertake "Shenzhou six" measurement and control communications nine sub-systems of the Shanghai Institute of Spaceflight Measurement and Control Communications researchers yesterday to the Morning Post reporter told the spacecraft and the ground between the inextricable relationship.
Eyes "live" astronauts every move
In the more than 300 kilometers high altitude of the "Shenzhou" spacecraft, astronauts every move on the ground screen is clearly visible, and this will be measured by the measurement and control communications system in the "eyes" to "eyes" to realize. According to experts, the realization of the "eye" function is mainly through the spacecraft internal camera, image compression and transmission system, digital transmission system and ground receiving and broadcasting system to complete.
It is understood that the "God six" to the ground data transmission of the total bandwidth of 2M per second, which is used for the transmission of the picture 704k, for the picture of the sound with 64k. With the development of China's image compression technology, 704k can be transmitted back to the image has been quite clear.
November 13, 2003, in the Shanghai Science and Technology Museum, the public to see the "God V" style. It is reported that there is no difference in appearance between the "Shen6" and "Shen5".
Mouth and ears After landing, the "voice" for the search
In the incomparable cold space, the ability to hear the voice of the ground for the astronauts is a psychological comfort. In the astronauts' training and testing process, the ability to withstand psychological pressure is also one of the most important aspects. According to experts, the "God six" design of the sound transmission of the "multi-insurance" to ensure that the "hotline" smooth.
It is understood that the voice communicator on the spacecraft will cover analog voice and digital voice, including digital voice 16kbps, 32kbps, 64kbps and other channels. The analog voice transmitted through short waves will be used as an emergency channel, which experts explain is because short waves are characterized by wide coverage.
According to the experts, the "God VI" in addition to the communication equipment on the suit, but also specially prepared for the headset. It is understood that Yang Liwei in the "God five" 21-hour space trip in nearly 10 kilograms of spacesuit has not been able to leave the body, and will soon be ascending to the sky, "God six" astronauts can not be subjected to this "ordeal! "After entering the capsule, they can take off their spacesuits and put on their operating suits and headsets.
In addition to the air, "God six" of the "mouth and ears" in the return to Earth will also be put to great use. It is revealed that in this "Shen six" return capsule return, after landing it will be through the short-wave to the surrounding analog voice, waiting for the search forces to come, and this is also because the short-wave has the characteristics of the ground suitable for transmission.
A pair of invisible hands can remotely control the attitude switch of the spacecraft
During the flight of Shenzhou VI, the "USB-band channel" and "C-band channel" of the measurement and control communication system can determine the flight speed, speed and speed of the return capsule, as well as the speed of the return capsule and the speed of the return capsule. "can flight speed, distance, orientation and other information transmitted back to the ground command center. According to experts, these two channels are like the main road and auxiliary channels on the road, responsible for all kinds of information sent to the ground smoothly.
After the ground receives the specific information, it will be able to transmit commands or data to the spacecraft through a USB transponder, which can remotely control the spacecraft's attitude and the switch of each instrument.
Nerves Touching astronauts' pulse on the ground
Aboard the Shenzhou VI spacecraft, there is an ultra-short-wave communication system that allows ground staff to learn about the astronauts' physical condition. According to experts, the system monitors the astronauts' physiological data through special sensors. Biological and medical experts on the ground can receive the astronauts' pulse, blood pressure, and physiological reactions of the organs of the whole body, so that they know the astronauts' physical condition well and give timely and reasonable health care advice. In addition, these data can also accumulate information for the future establishment of the space station.
It is understood that, in order to avoid sudden external interference, the researchers have prepared a variety of programs to ensure foolproof. Short-wave, ultra-short-wave, S-band, C-band and a variety of different frequency bands will be able to ensure that all kinds of data can be transmitted to the ground smoothly.
Shenzhen 6 measurement and control communication system developed by Shanghai's nine major subsystems
1. USB-band channel: complete the manned spacecraft between heaven and earth wireless communication main channel, can realize remote control, telemetry, image transmission, two-way call, ground tracking and measurement tasks.
2. C-band channel: It is mainly used for orbit measurement of the spacecraft, and transmits the flight speed, distance and orientation of the return capsule back to the ground command center. It is also used as the auxiliary of USB band channel.
3. Image Transmission System: It takes pictures of the astronauts' flight in space and conducts digital-to-analog conversion and compression, and transmits them to the ground in real time.
4. Voice transmission system: there are several transmission channels, which can provide reliable two-way voice transmission between space and earth.
5. Spaceship telemetry system: it is used to display the working status of all kinds of equipments in the spaceship, and the experts in the ground control center can know whether all kinds of equipments on the spaceship work and whether the spaceship's running attitude is normal through the data interpretation.
6. Remote control system of the airship: it can cover the process of the airship's ascent section, operation section, return section, and recovery section, etc. It is mainly used to issue all kinds of flight commands and inject them into the airship. It is mainly used to issue all kinds of flight commands and inject the data needed for the work of the airship's computer. In the flight, in case of individual equipment failure of the spacecraft, the computer will provide astronauts with a "menu" on how to overcome the failure.
7. Ultra-short-wave communication system: responsible for transmitting all kinds of physiological data of the astronauts.
8. Short-wave communication system: with strong ground wave transmission capability, it can transmit farther than other channels and is used for emergency communication. It can also transmit GPS positioning signals, which can provide ground searchers with the latitude and longitude of their location after the return module has landed.
9. Antennas
Remarks: The entire measurement and control communication system includes a GPS positioning system and a frequency synthesizer developed by a Beijing-based organization, in addition to the nine subsystems in Shanghai.
Experts revealed the manufacturing details of Shenzhou VI, equipped with environmental control and oxygen supply system
2005-10-10 14:29:23 Source: People's Daily Online (Beijing) Netizen comments 1
By the news (reporter Huang Yong) China is about to launch the "Shenzhou VI" spacecraft news touched hundreds of millions of people's hearts, the news of the launch of the "Shenzhou VI" spacecraft. Hundreds of millions of people's hearts, "Shenzhou six" on a number of equipment is the Nanjing research institutes or colleges and universities. Yesterday, "flying into space - China manned (Nanjing)" exhibition organizing committee invited several aerospace experts from Nanjing to visit the National Exhibition Center, the reporter interviewed them to unveil the mystery of the "Shenzhou VI".
"God VI" a number of equipment made in Nanjing
Nanjing Chenguang Group Science and Technology Committee Director, former Chairman of the Board of Directors Chen Meng Eminent revealed that they are responsible for the "God VI" piping system and fuel refueling system. Because the space capsule itself is very small space, leaving the pipeline "body" place is very limited, coupled with the spacecraft requires the installation of a variety of pipeline to be very dense, so it is not possible to use the ground on the pipeline materials and connection methods. Chenguang Group through the spacecraft piping system continued for decades of research, the newly developed soft and easy to connect the pipeline, for the "God six" astronauts in the capsule section of the life, walking, scientific research activities "make" more space. Chen Meng brindled also said that although the "God six" launch has been basically ready, but the launch time also depends on the weather, otherwise the spacecraft can not be safely controlled in time after the airspace operation.
The fuel-filling system for the Shenzhou VI launch vehicle is also developed and produced by Chenguang Group. Zhu Zhonghui, the group's chief engineer, told reporters that the general weight of the satellite is 3 to 4 tons, and the manned spacecraft is 4 to 5 tons, which requires the launch vehicle to have a very strong boost while reducing weight. Liquid-fueled launch vehicle has become the first choice, the precision of this system is directly related to the launch of the launch vehicle safety - must ensure that the fuel refueling "watertight", in the launch can not produce intense sparks, generally in the rocket launch the day before, refueling The refueling system usually starts working the day before a rocket is launched to add fuel.
In addition, Nanjing's scientific research units were involved in the development of the Shenzhou VI tracking radar, the construction of the ground monitoring station, the production of spacesuits and many other tasks. Many graduates of the Nanjing University of Aeronautics and Astronautics also participated in the development and launch of Shenzhou VI, and Prof. Wang Lirong of the University of Aeronautics and Astronautics also disclosed that the deputy commander-in-chief of the launch of Shenzhou VI was a graduate of the university.
"God six" spacecraft internal installation of "air conditioning"
"God six" is more everyone wants to "reveal the secret of the internal
"Shen six" interior is more everyone want to "reveal the secret", Prof. Wang Lirong revealed to the reporter some of the details: "Shen five", Yang Liwei or lying or sitting in the narrow return module, but "Shen six" will load two astronauts in the sky to stay 5 days, and to be from where the The small return capsule in the "floating" to the larger space below the orbital module, to carry out some scientific experiments. The two astronauts stayed in the return capsule, which is only 2.5 meters in diameter, for a long time will emit a lot of heat, making the temperature inside the capsule rise, which may cause certain effects on the instruments and astronauts.
To this end, experts have installed an "air conditioner" - an environmental control system - for "Shenliu", which can absorb heat and maintain a constant temperature in the cabin. In addition, in order to provide enough oxygen to the two astronauts, the spacecraft is also equipped with an oxygen supply system, which can not only disseminate oxygen, but also absorb a large amount of carbon dioxide exhaled by the astronauts.
In addition to the launch, "Shenzhou" can carry the astronauts to return safely, return to whether the accurate landing in the predetermined location, the scientific and technological "gold content" requirements are equally demanding.