China News Service, Beijing, September 17 (Mar Shuaisha Guo Chaokai) The Shenzhou 12 return capsule landed smoothly on the 17th, and the astronauts Nie Haisheng, Liu Boming and Tang Hongbo returned to the earth smoothly.
In order to ensure the safe "home" of the astronauts and crew, the thermal control "housekeeper", new radar, and "brake commander" worked together to help pave the way for "Shenzhou to go home".
Thermal control "housekeeper" to ensure re-entry temperature adjustment
When the return cabin re-enters the atmosphere, it will experience drastic changes in ambient temperature, and a dedicated thermal control system is required to control the temperature of the internal equipment.
The Henan Aerospace 695 Plant of China Aerospace Science and Industry Corporation provides temperature control valves, self-locking valves, automatic control valves, filters, service valves, quick disconnects and other products for the spacecraft thermal control sub-system. It is responsible for controlling the thermal control sub-systems. The system media flow, on and off, maintain the system media clean, ensure that the entire system can accurately adjust the temperature according to the requirements, and ensure that the components, instruments and equipment in the cabin are at the appropriate temperature under the severe temperature difference, which can be said to be a guarantee for the thermal control system The key "housekeeper".
Radar "first show", the "last shot" of relay tracking measurement mission
In this mission, the 23 passive positioning radar system of the Second Academy of China Aerospace Science and Industry Corporation undertook the return tracking measurement task, which is related to the acquisition of a series of return data and plays an important role in the smooth return.
This is the "first show" of the radar's participation in the manned spacecraft recovery mission, and the "last stick" of the returner tracking and measurement mission.
It plays a role after the spacecraft's parachute is opened, and is not affected by the weather. It can increase the detection accuracy during landing from "kilometer level" to "100m level", greatly improving search and rescue efficiency.
It is understood that the 23rd Institute of China Aerospace Science and Industry Corporation used China’s first precision tracking phased array measurement radar "Recovery One" to ensure the safe return of Shenzhou 1 to Shenzhou 11 and witnessed the manned space exploration and test mission. Every step of development.
The support radar for this return mission is a new system radar developed by 23, which has realized the replacement and upgrade of the radar system.
Smart "brake" brings a comfortable landing experience
In the final stage of Shenzhou 12’s return home, the “brake commander” developed by the 35th Academy of Aerospace Science and Technology of China played an important role.
It is located at the bottom of the Shenzhou 12 return capsule. The gamma-ray detection system gives it the ability to penetrate the vegetation on the ground surface, and can accurately measure the height of the return capsule from the ground surface.
When the return module is at a certain height from the ground, it gives a pre-command signal, the indicator light in the cabin lights up, and the astronauts are ready for landing. After that, the optimal ignition command is issued at a suitable height according to the real-time speed, and the reverse thrust engine ignition "brake" is controlled to maximize the cushioning performance of the reverse thrust engine to allow the astronauts to land safely and comfortably. (over)