Shenzhou spacecraft

November 18, 2011 God of eight home "the Watcher

　　"Go home!”17th under the witness of many pairs of eyes, Shenzhou eighth returned to space safely. Advantages of independent innovation of China's space technology, gamma height table, "recycling first" radar, connecting trip sth Silent guardian angels eight home, left China in a vast journey between heaven and Earth space people shining footprints.

　　Gamma altimeter – enables eight of God "Made In China"

　　Shenzhou spacecraft's return capsule, eighth after the main parachute opened, there is a localization of key devices – developed independently by China Aerospace Science and industry group company gamma altimeter, enabled in China's manned spacecraft returns for the first time, it is also a stand-alone device localization of Shenzhou spacecraft's final implementation, realization of Shenzhou spacecraft's "Made in China". Its success, won unanimously praised by the parties, once again inspired the nation's aspirations.

　　It is understood that the eight gamma altimeter with God after launch, flight and Rendezvous in orbit and reentry returned a total of four flight phases. Mission ultimate recovery and landing, about 8,000 metres height from the ground after the main parachute opened, gamma altimeter starting power, landed 10 minutes until the whole process in 1 second before landing and some 9 meters altitude, giving command signals, prompting astronaut to be a soft landing. In front of the landing "0 seconds" from the ground about 1 meter high ignition is given instructions, start the return capsule backstepping engine ignition, slowing the return capsule lowering speed and achieve security soft landing spacecraft's return capsule.

　　Gamma altimeter system is the last link eight mission of God. So the success of the device, not only has a direct bearing on the successful completion of the Mission of Shenzhou spacecraft, more related to the safety of the astronauts. Zhiqian, given the technical complexity of the device, has been unable to master the key technology in China. 18 years, the China Aerospace Science and industry of hospitals 35 aerospace Clank oath has been issued for several generations, overcome hard times in a row, fame and selfless devotion, God's eight provided the final link of safety and security, and further proved the powerful research and development capabilities of China's space.

　　"Recycling first" eight escort radar – Shenzhou "back home"

　　Central Inner Mongolia on the Prairies, the China Aerospace Science and industry LM-313 radar developed by the hospital 23, also known as "recycling first" radar. It look as far as the eye can see nine days, no missed eight of God to enter any period after the blackout area, and a perfect record of eight before the return to Earth of God trajectory. This is also the radar eighth escort spacecraft home.

　　According to understanding, in the and Temple first, separation completed zhihou, God eight in entered atmosphere of process among, in returns ground Qian, entered to from ground 120 ㎞-40 ㎞ height of dense atmosphere Shi, due to 7.9km/s of high speed, and around of atmospheric friction produced high temperature, led atmospheric molecular ionization of, formed ion shell, cause isolated has spacecraft and ground remote control device with communications, therefore also on lost has contact, this is "black barrier area".

　　And LM-313 radar is what makes up for lack of ground control equipment, by radar reflective track to maintain continuous tracking of the spacecraft, until the landing of the spacecraft, provides accurate data for accurate positioning of the spacecraft landing site.

　　As early as 1999, LM-313 radar completes the "Shenzhou first" recovery stage of tracking and measuring tasks. Between September 2008 and that it had successfully completed seven consecutive Shenzhou spacecraft recovery tasks. In 2009, previously on the basis of 23 research and development team to improve system performance, reliability, and maintainability as the main objective to upgrade the radar, to replace the fragile life.

　　Practice has proven that in the blackout area, it is God VIII of "eyes", was accompanied by the "Shenzhou" security guards to cross the blackout area. Experts said the renovation upgraded LM-313 radar, increasing system performance, reliability, maintainability, although overall not much has changed, but is considered the second generation radars, manned spaceflight has laid a good foundation for the future.

　　Connection isolation institutional strengths being ship arms

　　Shenzhou spacecraft track cabin and returns cabin Zhijian of first, lock, is guarantee astronaut smooth returns Earth of first road security protection; returns cabin and promoting cabin Zhijian of second, lock, is guarantee returns cabin entered atmosphere Hou in scheduled time scheduled locations landing of primary device; spacecraft landing Qian, threw end lock of action is bearing heat large end can on time threw off, and parachute can normal open, is returns entered atmosphere Shi protection astronaut life security of first road program.

　　From God to eight, the class and the connection between the trip, which protect the running of the spaceship returns and laying a solid technology foundation for rendezvous and docking.

　　"This God Temple on the first and eight to achieve rendezvous, docking, the spacecraft will take unprecedented collision loads, this required" connection trip "strength of connections must be stronger than before, and more agile. "14 years been engaged in" connecting trip "developed by China Aerospace Science and industry of hospitals 111 factory engineer, competent designer Wang Zhijian introduction.

　　Wang Zhijian told reporters that the request made for rendezvous and docking missions, technical staff of "connecting trip" in the review of retry, and through the use of new high strength steel, raising the level of structure materials and corrosion resistance, strength and improved the ship's docking connection strength.

　　According to describes, development "connection separation institutions" of difficulties reflected in three a aspects: a is as spacecraft of arms, and connection three cabin of skeleton, it of firmly sexual is spacecraft of firmly sexual, no it, spacecraft is separated of several cabin segment, cannot became overall; II is as implementation cabin segment separation of only device, three species lock must on time decisive started, implementation separation, otherwise follow-up task are will was effect, relationship success or failure; three is these requirements is difficult to in ground simulation test, must trying to ensure products quality, Products once in heaven there is no room for any repair.
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