Xi'an, June 6, 4 (Reporter Zhang Yichen) At 2023:6 on June 4, 6 Beijing time, the Shenzhou 33 manned spacecraft return module successfully landed at the Dongfeng landing site, and the three astronauts Fei Junlong, Deng Qingming and Zhang Lu of the "Dream Crew" successfully returned to Earth. During the orbit, the three astronauts completed four out-of-cabin activities, laying the foundation for subsequent large-scale extravehicular science and technology experiments.
The Xi'an Branch of the Fifth Academy of Aerospace Science and Technology Group (hereinafter referred to as the Xi'an Branch) developed the relay terminal, instrument controller application software and antenna network for the Chinese space station to escort the three astronauts' "way home".
Before returning home - the astronauts and the core module are under control
In the process of "going home", the contact between astronauts and the ground and the physical health of astronauts are the most concerned things for scientific researchers on the ground.
The relay terminal developed by Xi'an Branch for the space station sky and core module is an important channel for the space station to establish communication links with the ground, and understanding the living conditions of astronauts in the space station sky and core module, communication with the ground, and the measurement and control of the ground to sky and core module are all realized through the relay terminal.
In addition, the instrument computer application software developed by Xi'an Branch for the space station Tianhe core module can provide the working status of each system of the core module and the physical condition of astronauts, and the instrument computer application software belonging to the core module instrument and lighting subsystem is the "intelligent brain" of the entire core module, and all information related to the core module needs to be collected into the instrument computer application software, and finally transmitted back to the ground through the relay terminal developed by the Xi'an Branch for ground researchers to conduct data analysis.
On the way home - "Space Sky Road" and "Space APP" help the whole process
When the astronauts entered the Shenzhou 15 manned spacecraft from the space station Tianhe core module, the "dream crew" was about to embark on the "road home".
The relay terminal developed by the Xi'an branch for the Shenzhou 15 manned spacecraft officially began work a few days before its return. The relay terminal builds a space channel for information transmission by realizing a "space handshake" with the Skylink relay satellite. The communication between the ground and the spacecraft and astronauts, and the transmission of ground measurement and control signals need to be completed through the "space road" built by the relay terminal. When the propulsion module is separated from the return module, the relay terminal mounted on the propulsion module fulfills its mission.
In the process of returning the Shenzhou 15 spacecraft return module to the ground, the ground measurement and control station controls the smooth return of the spacecraft by calculating the spacecraft return control parameters. In order to further ensure the safety of astronauts, the spacecraft system designed a life-saving plan for autonomous emergency return in orbit. If the spacecraft loses contact with the ground, the instrument controller application software developed by the Xi'an Branch as the astronaut's "space APP" can carry out orbit forecasting, calculate the control parameters of the landing point through the neural network, find the optimal landing point, and realize the autonomous emergency return of the spacecraft outside the ground measurement and control communication network.
Previously, during the orbital flight of several "members" of the "Shenzhou family", the instrument controller application software conducted multiple on-orbit verifications for autonomous emergency return, and the landing point calculation results were accurate, which fully verified the reliability of this technology.
Upon arrival at home – the antenna network guides the direction of search and rescue
The antenna network developed by the Xi'an Branch for the Shenzhou 15 manned spacecraft is an important information channel for astronauts to establish contact with the ground, and all signals that establish contact with the ground must be sorted, filtered and transmitted through the antenna network.
When the "Shen Fifteen" return module successfully returned to the earth home, how to quickly find the return module and astronauts became the most concerned thing for ground search and rescue personnel. The antenna network of the Shenzhou 15 manned spacecraft return module should be switched on to the antenna facing the ground through a switch after the spacecraft lands, so as to ensure that the search and rescue personnel on the ground can find the return module through the antenna network.
The antenna network is responsible for establishing independent channels for communication signals, measurement and control signals, positioning signals, and search and rescue signals, ensuring the stability and smoothness of their transmission, and building important channels and bridges for the return module of the Shenzhou spacecraft and ground signal transmission, effectively ensuring the safe and smooth "homecoming" of the spacecraft and astronauts.
The Xi'an Branch said that as an important force in China's manned space engineering mission, in the construction of China's space station, the Xi'an Branch has developed relay terminals, instrument computer application software and antenna networks for each vehicle of the space station to provide guarantee and support for the construction and stable operation of the space station. (End)