"嫦四" successfully landed on the back of the moon to sensationalize the world, you can remember how textile technology is

On the 4th, the 4th successfully landed on the back of the moon, and passed the "Bridge Bridge" relay star back to the world's first close-up image of the moon, which unveiled the mystery of the ancient moon. The mission realized the first soft landing of the human detector and the relay communication of the first moon back with the earth, which opened a new chapter in human lunar exploration. This major news highlighting China's space science and technology has not only made headlines in the Chinese media, but also appeared in the important pages of many foreign media. Even NASA Director Jim Bridenstine sent a congratulatory message on Twitter and said it was the first time humans (landing on the back of the moon).

At this moment of joy and pride, you can remember that as early as May 2018, the "Bridge Bridge" relay star was launched to the intended location in advance, and a communication bridge was set up between the ground and the back of the moon, waiting for "嫦娥" to meet. The "umbrella" used by the two to "give the feelings" includes the power of textile technology.

Sun Wei, director of the China Aerospace Science and Technology Group's five-factor relay star “鹊桥”, said that “鹊桥” is not the protagonist of the No. 4 mission, but an important part of its mission is to land the lander and patrol on the back of the moon. Providing relay communication services is equivalent to moving a ground station to the sky. According to reports, the track of the "Bengqiao" operation is very special, surrounding the second Lagrange (L2) point of the month, the farthest from the detector on the back of the moon is 79,000 kilometers, nearly 500,000 kilometers from the Earth. After the information of the No. 4 detector is transmitted to the "Bridge Bridge", it will be demodulated and processed first, and then transmitted back to the Earth.

It is understood that this relay satellite has a mass of 425 kg and a life expectancy of more than 5 years. The body has a rectangular parallelepiped configuration with a large-diameter umbrella-shaped parabolic antenna mounted on the top. When it is launched, it will be retracted. When it enters the space, it will open in time. The umbrella-shaped parabolic antenna uses the satellite antenna network developed by the Chen Nanliang team of the Donghua University Textile Institute. The spaceborne antenna metal network not only created the history of China's satellites using independent research and development of metal mesh antennas, but also played a milestone role in the localization process of key products of flexible antennas, laying a solid foundation for the smooth application of domestic metal mesh in orbit.

The metal mesh is the key component of the satellite antenna to reflect electromagnetic waves and the basic material of the spaceborne mesh antenna. However, for a long time, China's spaceborne antenna metal mesh mainly relies on imports . Since 2008, Chen Nanliang team and related research institutes have joined hands to embark on a national aerospace mission. After a long period of unremitting research, Chen Nanliang's team used ultra-fine wire strands and warp knitting technology to achieve a technological breakthrough in the twisting of extremely fine gold-plated molybdenum wire with only 1/4 of the hair, and innovative design and manufacture. Alignment, warping and warp knitting equipment and a full set of production processes. According to the team, this series of technology and process breakthroughs not only smoothly realized the satellite antenna metal mesh "rigid and soft", but also made the weight of the "big umbrella" less than 90%, which is more convenient to carry. With the large size, the high-power communication of Beidou navigation satellites and mobile communication satellites has benefited from this. Through the unremitting efforts of Professor Chen's team, a small metal mesh woven out has greatly contributed to the development of China's space industry.