Xi’an Announcement At about 10:00 on April 16th, the Shenzhou 13 manned spacecraft return capsule landed in Dongfeng The landing site was successful, and the astronauts Zhai Zhigang, Wang Yaping, and Ye Guangfu returned safely and felt good. At this point, the mission of the key technology verification phase of the Chinese space station has been completed, and the on-orbit assembly and construction phase is about to be transferred. The relay terminal, antenna network and instrument controller application software developed by the Xi’an Branch of the Fifth Academy of Aerospace Science and Technology Group for my country’s space station escorted the astronauts’ safe return to the earth home.
Before going home< /p>
The status of the astronaut and core module is under control
The astronauts have to go through “room” and “luggage” before returning to their home on Earth , exercise, familiarize yourself with procedures, turn off lights and lock doors, etc. Among them, the connection between the astronauts and the ground and the physical health of the astronauts are the things that the ground researchers are most concerned about.
The relay terminal developed by Xi’an Branch for the Tianhe core module of the space station is a space station The important channel for establishing communication with the ground, the living conditions of the astronauts in the space station sky and the core module, the communication with the ground, and the measurement and control of the ground to the space station sky and the core module are all realized through the relay terminal.
In addition, the Xi’an branch has developed for the Tianhe core module of the space station. The instrument computer application software can provide the working status of each system in the core cabin and the physical condition of the astronauts. The instrument computer application software belonging to the instrumentation and lighting sub-system of the core cabin is the “smart brain” of the entire core cabin. The information 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 data analysis by the scientific researchers on the ground.
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“Space Road” and “Space APP” help the whole process strong>
The relay terminal developed by Xi’an Branch for the Shenzhou 13 spacecraft is before the return days to officially start work. The relay terminal builds a space channel for information transmission by realizing “space handshake” with the Tianlian 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 sky road” built by the relay terminal. When the propulsion module is separated from the return capsule, the relay terminal installed on the propulsion module completes its mission.
During the return of the Shenzhou 13 spacecraft to the ground, the ground Measurement and control play a very important role. The ground measurement and control station controls the smooth return of the spacecraft by calculating the return control parameters of the spacecraft. However, in order to further ensure the safety of astronauts and improve the ability of the spacecraft to operate autonomously, the spacecraft system has designed a life-saving plan for autonomous emergency return to orbit. That is to say, once the spacecraft loses contact with the ground, the ground command system will not be able to calculate the accurate landing point for the spacecraft, and the spacecraft will activate the autonomous emergency return system.
At that time, the instrument controller application software developed by Xi’an Branch will serve as the astronaut The “Space APP” can make orbit prediction, and calculate the control parameters of the landing point through the neural network, find the optimal solution of the landing point, and realize the autonomous emergency return of the spacecraft outside the ground measurement and control communication network.
The application of the autonomous emergency return system is like providing an emergency life channel, It further improves the safety of the spacecraft and the astronauts themselves. Previously, during the on-orbit flight of Shenzhou “Brother”, the instrument controller application software conducted multiple on-orbit verifications for autonomous emergency return, and the calculation results of the landing point were accurate, which fully verified the reliability of this technology.
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Antenna network directs search and rescue directions
The antenna network developed by Xi’an Branch for Shenzhou 13 spacecraft is important information for astronauts to establish contact with the ground Channels, all signals that establish contact with the ground must be sorted, filtered and transmitted through a network of antennas.
When the Shenzhou 13 spacecraft returns to its homeland successfully, what will happen? Quickly finding the return capsule and the astronauts became the top concern of the ground search and rescue personnel. The antenna network of the Shenzhou 13 spacecraft’s return capsule should be switched on after the spacecraft landed, and the antenna facing above the ground should be switched on to ensure that search and rescue personnel on the ground can find the return capsule through the antenna network.
Antenna network is responsible for communication signal, measurement and control signal, positioning signal, search and rescue signal Establish an independent channel to ensure the stability and smoothness of its transmission, build an important channel and bridge between the Shenzhou spacecraft’s return cabin and the ground signal transmission, and effectively ensure that the spacecraft and astronauts “go home” safely and smoothly.
Text: Kwan Ying and intern Kang Yajie, an all-media reporter of Xi’an Newspaper Industry< /span>