English 版 (精华区)
发信人: murjun (萧牧), 信区: English
标 题: Spaceship perfect for mission job
发信站: 哈工大紫丁香 (2003年10月16日08:52:26 星期四), 站内信件
The Shenzhou spaceship has three main modules - the orbital module, the
re-entry module and propellant module - plus an extra section.
The orbital module is for the astronaut to live in and to use in carrying out
his scientific experiments during the flight while in earth orbit.
There-entry module is where he stays during the launching period and when
returning to the earth, while the propellant module is to offer power for the
craft and to control its position, change its orbit and return it to earth.
Lying at the forefront of the spacecraft, the orbital module is an air proof
columniform structure equipped with solar cells on both sides, and solar
sensors with all sorts of antennae on its exterior.
The orbitor is fixed with a docking port if docking maneuvers are required.
If no docking is planned an extra segment is attached.
The uniqueness of the craft lies in its orbital module, which has multiple
functions: It becomes a sitting room for astronauts during their flight, a
testing cabin when they do experiments, a targeting aircraft when they seek
to dock to other craft, an air brake when astronauts stroll outside, and, a
hold when the craft is returning.
Conditions for life in the Shenzhou V are similar to that on earth, a senior
expert was quoted yesterday by Xinhua as saying.
While in space, the astronaut works, eats and sleeps in the orbital module,
according to Su Shuangning, a chief designer for the astronaut system under
China's space flight programme.
"The onboard life support system creates an intra-module environment about
the same as on earth,'' the expert said.
Elaborating, he said the astronaut system is fitted with sub-systems for air
pressure, ventilation, sterilization, temperature and humidity. These ensure
normal temperature, moisture and air pressure, including the pressure of
oxygen and carbon dioxide, inside the two modules.
Shenzhou V operates primarily on preset programming, meaning that the
astronaut plays a supplementary role in monitoring the flight and in
controlling and running the spaceship in the course of the flight.
His task is to observe and record the conditions of the orbiting spaceship
for the ground control centre.
The Shenzhou spaceship is distinct from the first manned spaceship of the
former Soviet Union and the US in terms of its structure.
The Vostok spacecraft, the craft that contained Yuri Gagarin, the former
Soviet Union cosmonaut and the first one in human history, and the Freedom 7
Mercury spacecraft, the one that contained Alan Shepard, the first US
astronaut, both had two modules, while the Shenzhou spaceship has three.
In the first space flight, Vostok only circled around the earth for one time
and the Mercury craft conducted a suborbital flight.
The Chinese astronaut, in comparison, is due to spend nearly one day along a
low earth orbit.
In the aspect of power supply, the Shenzhou spaceship mainly uses solar
cells, which is an advancement compared with the power supply systems on the
Mercury and Vostok spaceships
--
我非常喜欢在有风有雨的季节计划自己;
有风有雨后的季节晒着阳光我昏昏睡去;
睡去的我依然在甜梦中将曾有过的温习;
温习昨天前天等等的种种激情与过去。
Jim Mural
※ 来源:·哈工大紫丁香 bbs.hit.edu.cn·[FROM: 211.93.37.4]
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