Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizen grass Luo Yuzi for the clue delivery! CTOnews.com, November 11, according to the official Wechat account of "Shanghai Aerospace", the eighth Research Institute of China Aerospace Science and Technology Corporation for the first time put forward a set of construction concept of "space environment governance system" based on "reuse, re-entry, life extension and purification" at the 14th China Air Show, and set up a theme exhibition area of "effective space governance". The additional service aircraft that can be used for "prolonging life" and the derailment sail for "purification" are displayed, and the related technical achievements have been successfully practiced and applied.

▲ figure from the official "Shanghai Aerospace" Wechat account according to the introduction, for some satellites, the "end of life" is not caused by their own faults, but because they carry insufficient fuel. As the fuel is exhausted, the satellite can no longer perform attitude control, orbit maintenance and other functions, so they have to choose to enter the atmosphere to burn or become space junk. In other words, the fuel reserve directly determines the life of a satellite.

In April 2017, China successfully broke through the "space refueling" technology, which means that the ability to extend the life of satellites at the end of their life can be achieved through in-orbit fuel replenishment. The "refueling service aircraft" participating in this exhibition can be used to provide refueling services for satellites that have run out of fuel, and it is a "mobile gas station" that can prolong the service life of satellites. After receiving the replenishment service request, the replenishment aircraft will send instructions through the ground to the vicinity of the satellite to be added, use the robotic arm to connect with the target to form a combination, and refuel the target satellite after connecting the replenishment pipeline.

The ▲ picture shows that a satellite in urgent need of rescue can prolong its life by a year with only 50kg of fuel, while the aircraft on display can carry 1.3t of fuel at a time.

CTOnews.com learned that the "low-cost universal interface satellite derailment device" (referred to as "derailment sail") in this exhibition is a thin film structure with a space expansion and a small state of collapse. for micro-satellites with an orbital height of less than 600km, the derailment sail can be put into orbit with the satellite and unfold at the end of the satellite's life, increase the stress area through the expansion of the "sail" and slow down with the help of thin atmospheric resistance. It was eventually dragged into the atmosphere by gravity and burned, giving up valuable orbital resources.

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