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If all goes well, the eighth brother of the Shenzhou family has so far soared in space and has begun a wonderful journey to space for chasing the one that has been "the long-awaited". As the Shenzhou series of spaceships, what is the difference between the Shenzhou-8 spacecraft, which ranks the oldest eight, and the Shenzhou VII spacecraft, its own Seventh Brothers? What kind of unique advantages does the Shenzhou “Old Eight†bear with a flying kiss? Aerospace experts conducted an authoritative interpretation of this, according to reports, "God 8" hidden mystery, technical status changes up to 100, involving the product has a cabin, cabin and extravehicular cameras, power subsystems, the overall circuit.
Shape: increase the measurement sensor
Shenzhou No.8, which performs the rendezvous and docking mission, is an improved spacecraft. It uses the three-cabin structure of the return capsule, the propulsion capsule and the orbital capsule. The total length is 9 meters. The maximum diameter of the capsule segment is 2.8 meters and the takeoff mass is 8082 kg. The orbital cabin is an astronaut's living cabin, with an effective activity space of 5 cubic meters. It is equipped with rendezvous and docking measurement equipment and an active docking mechanism. The return capsule is a cosmonautical cabin with a parachute and a landing buffer system. Dashboards and instructions are installed in the cabin. The board and the astronaut manually control the handle; the propulsion module is the power and energy section of the spacecraft, and it is equipped with track-controlled, attitude-controlled engines and solar panels.
According to Shi Yong, the designer of China Aerospace Science and Technology Corporation’s five-hospital manned space division, the cabin of the Shenzhou VII can be said to be one cabin and two “namesâ€. According to its function of supporting astronaut’s space life, it is called an orbital module. According to its function of supporting the astronaut's out-of-home activities, it is called an airlock. Shenzhou 8 does not have this airlock. "God Eight" has added a measuring sensor to the shape for rendezvous and docking measurements.
Flying: Forward and Pan
From the appearance point of view, the "God 8" and "Shen 7" are the same. However, another highlight of the “God 8†is reflected in the return seats, reflecting the green concept of the designers.
Although "God 8" was not carried, the researchers designed it according to the astronaut's suitable environment. "Although the seals of the spacecraft systems have been completely safe, the harmful gas in a pressurized gas bag under the seat will be inconceivable if it is leaked," said Shi Yong. Therefore, "God 8" finally decided to use compressed air instead of gas, and accordingly added a set of air source assembly system as a power source. The principle of lift of the seat is not changed, and the use of compressed air means that even if a leak occurs, it will not have any adverse effect on the astronauts' body. When returning, the astronauts suffered heavy impact. In order to make the astronauts feel more comfortable when they landed, the seat of the “God Eight†was changed to a big bottom.
In addition, the spacecraft not only can go forward, but also has a translation function. This is another highlight of the Shenzhou 8 spacecraft.
Power: 12 generators added
"God 8" has changed its technological status by up to 100 items. Shi Yong said that because the added equipment is of different sizes, different severity and different functions, these equipment cannot simply be installed in the propulsion module. The design of the overall unit of the propulsion tank must take into account the center of gravity and balance of the tank in the process of space flight. It must also be installed in a suitable location according to the size of the product volume. At the same time, it is necessary to consider the operation and maintenance of the operator when installing, and the comprehensive Trade-offs, the overall design scheme for the development of the cabin is scientific and rational, and safety commissioning is in place in one step, which ensures the completion of the mission of the "God 8".
At the same time, the “God 8†is more powerful than the “Shenzhou 7â€, and its booster cabin has added 12 generators. In terms of function, "God 8" has added the capability of rendezvous and docking.
Videography: Spreading the screen to the world
How can the moments of "God 8" and "Heavenly Temple" be quickly passed to the world? The Shenzhou 8 spacecraft's measurement, control, and communication subsystems solved this problem. Shi Yong said that the "Kai Shen 8" outboard camera can be controlled by the astronaut, and its image processing capability is better than that of "Shenzhou 7". The sub-system adopts an advanced compression coding system and dual-channel image transmission mode, which greatly improves the image transmission quality and ensures that the images can be clearly transmitted back to the ground so that the people of the world can see the feats of China’s spaceflight. (Editor: Guo Caiping)
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