Beijing, May 5 (Zhongxin Net) -- The Shenzhou-30 manned spacecraft was successfully launched at the Jiuquan Satellite Launch Center on the morning of May 5, and successfully completed autonomous rapid rendezvous and docking with the space station complex in the afternoon. The reporter learned from CETC on the same day that in this mission, CETC, as the deputy commander-in-chief of China's manned space project, built key equipment such as a dense and safe measurement and control communication network, an energy matrix full of power, and a precise traction lidar to escort the entire Shenzhou 30 mission.
The iterative upgrade performance of the measurement and control system is stronger
"Optical tracking normal" "USB radar tracking normal" "Telemetry signal normal" ... When manned spaceflight and other launch missions are carried out, the public often hears "normal" passwords through live broadcasts.
Among them, the USB measurement and control network (unified S-band measurement and control network), a consistent and dense measurement and control communication network, is carefully woven by CETC from the dimensions of ground measurement and control stations, maritime survey ships and relay satellite systems, and escorts the whole process of spacecraft safe launch, flight into orbit, rendezvous and docking through precise control such as telemetry, external testing, and security control.
In view of the new situation and new characteristics of this task, CETC independently developed a new generation of ground measurement and control system, and successfully applied the system to upgrade the USB measurement and control equipment of Dongfeng Measurement and Control Station. "In previous measurement and control systems, the signal collected by the antenna had to be 'translated' before the available information could be read. The new generation of ground measurement and control system can directly skip the 'translation' link and achieve 'ready-to-use', which improves the signal transmission and reception efficiency several times. China electronic technology experts said that the new system technology is leading, using radio frequency direct sampling technology and all-optical fiber interconnection digital system architecture, greatly enhancing signal transmission anti-interference ability.
The software and hardware of the new generation of ground measurement and control system are domesticated, and the automatic operation design for the entire launch mission scenario is also complete, with complete "unattended" capabilities, even if the staff does not operate, the measurement and control system can accurately receive the operation status, real-time information, scientific research data sent back to the earth by the spacecraft through "thinking" and "judgment", effectively ensuring that astronauts and the ground command center two-way communication, image transmission, measurement control, safety control and other major tasks.
Rigid solar arrays, etc. are continuously injected with energy
China Electric Research Institute has issued rigid solar cell array "wings" with excellent performance and stable and reliable secondary power supply "pulse", which can continuously inject energy into spacecraft.
"By converting the received solar energy into electricity, the solar array can provide power to the spacecraft's subsystems and payloads, and provide charging services to the battery pack." According to technical experts, CETC equipped Shenzhou 16 with a rigid solar array, using three-junction gallium arsenide solar cells with high conversion efficiency and good radiation resistance. The product has a stable structure and high reliability, even in the face of complex power supply environment, it can be "as stable as Mount Tai", so that the "space journey" is full of power.
At the same time, CETC independently developed a variety of DC/DC converters and EMI power filters to provide a miniaturized and highly reliable secondary power supply scheme for launch vehicle flight control systems and spacecraft optical tracking systems. Among them, the arrow-borne series products can reliably supply power under the condition of strong impact and high vibration of rocket launch. The shipboard series products can ensure the safety and reliability of the secondary power supply and distribution system in orbit operation of the spacecraft in the environment of space radiation, low atmospheric pressure, and severe alternation of cold and heat.
LiDAR precisely traction space rendezvous and docking
The Shenzhou 6 manned spacecraft adopted the autonomous rapid rendezvous and docking mode, and successfully docked to the radial port of the space station Tianhe core module, and the entire docking process lasted about 5.<> hours.
CETC said that in the process of rendezvous and docking, the rendezvous and docking lidar of the space station independently developed by CETC receives optical signals from multiple directions and a wide range, accurately measures the relative motion parameters such as the distance and speed angle of the space vehicle, and accurately realizes the docking guidance of the radial port rendezvous mission of the core module of the space station.
At the same time, in order to realize the real-time ground control and comprehensive display of spacecraft in orbit operation, rendezvous and docking and out-of-cabin operation, the three-dimensional integrated three-dimensional display system developed by CETC can receive real-time data drive, predict and simulate the operation process, and have the ability to simulate the fine operation of the space station component-level entity, which can realize the digital twin effect of synchronizing the real operation scene of the space station mission with the digital platform, and improve the overall perception of the operation status of the space station by the ground control end.
In addition, the hybrid stepper motor produced by CEC is used in the spacecraft life support subsystem, which drives the temperature control valve through the motor to adjust the gas flow, effectively reduce the temperature rise, and provide a comfortable environment for astronauts and scientific experiments. In the astronaut system, more than 20 kinds of hundreds of sensors provided by China Electric Research Institute can accurately measure pressure, temperature, humidity, gas, physiology and other signals in each system, and monitor the astronaut's physical condition at all times. (End)