China News Service, Jiuquan, June 17 (Ma Shuaisha Guo Chaokai) The microwave radar developed by the 25th China Academy of Aerospace Science and Technology helped the Tianzhou 2 and the Tianhe core module rendezvous and docked, and once again guided the Shenzhou 12 The manned spacecraft successfully docked with the core module of Tianhe.
According to Sun Wu, the chief designer of microwave radar, this is to prepare for the docking between the space station mission radar and multiple transponders, and it was applied for the first time in the rendezvous and docking mission of the Shenzhou XII spacecraft.
According to the mission requirements of the space station, the rendezvous and docking show a trend of normalization and rapidization. The microwave radar technology has realized the development of platform and serialization, and the product performance is more stable and reliable.
The microwave radar installed on the Shenzhou XII spacecraft realizes the integrated design of measurement and communication, and has the function of communication switching. Through the interaction of communication data, matching and docking are realized.
"This is to prepare for the docking between the space station mission radar and multiple transponders. It is the first application in the rendezvous and docking mission of the Shenzhou XII spacecraft." Sun Wu said.
The microwave radar on the Shenzhou XII spacecraft cooperated with the three transponders in the core cabin in sequence, and carried out rendezvous and docking measurements through relays, realizing backward approach, radial orbiting, and forward docking to ensure the safety of the manned spacecraft and the core cabin. Reliable docking.
It is understood that the microwave radar is composed of two parts: the main radar and the transponder, which are respectively installed on the two spacecraft used for rendezvous and docking.
During the construction of the space station, three transponders were installed in the core module of Tianhe, and they were launched on April 29. The transponders compiled different numbering information and installed them at the three pairs of interfaces of the core module. On-orbit operation: The radar main engine is installed on the cargo and manned spacecraft respectively.
As a medium and long-distance measurement method, microwave radar provides accurate ranging, speed measurement, angle measurement information and communication data for the core cabin of the spacecraft and the space station during the rendezvous and docking process to achieve long-distance capture, stable tracking, and precise guidance.
The microwave radar developed by 25 has realized the rendezvous and docking of Shenzhou-8 and Tiangong-1 for the first time in 2011, and will build a "pin-and-thread" for the space station in 2021. In ten years, it has seven battles and seven victories, and it has delivered satisfactory answers with excellent results.
(Finish)