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Executive Director of the Chang-e-4 Probe Project
February 3, 2019 (Xinhua) – The Chinese Chang & # 39; e-4 landed in a shock nozzle on the dark side of the moon in the 26th minute from 10:00 on Jan. 3, marking the first landing of 39 An artificial probe on the surface of the dark side of the moon China has become the first country to make a soft landing on the dark side of the moon. This moment was no longer a pride for all the Chinese who were retiring, but also a milestone in the march of humanity towards the exploration of the moon.
Chinese Network correspondents of the Fifth Academy of Science and Technology of China visited the space station, where they had exclusive talks with Changhe-4 executive director, Zhang He, and the chief designer of the Changhe-4. pier, Lee Lei, deputy chief designer of Yue To, Bo and other members of the project team, "Zhang Ah-4", unveiled the probe's secrets, "Zhang Ah-4 . "
As soon as the Chang-e-4 probe landed successfully on the moon, a Xinhua News Agency reporter at the Beijing Aerospace Flight Observatory collected two images showing a crying engineer very happy.She is the executive director of Chang-e-4 probe project, Zhang Lui, responsible for the day-to-day management of technical affairs. The first impression that Zhang He leaves when the others are elegant, practical, easy to handle and fun. Zhang told our correspondent that China's lunar exploration project was launched in 2004 for over 15 years and that thousands of people participated in the Chang's exploration project, which lasted almost four years. "The moment the probe lands softly on the Moon means the success of the project.At that time, I was impressed by the chief designer of the probe detector," he said. "Congratulations, it's a difficult task." His words reminded me of the hard work we have done over the last four years until I start crying because of the feelings of joy that flood me.
From 1958 until now, more than 110 lunar explorations have been carried out in the history of mankind, but the landing on the moon has only been achieved 20 times and all previous landing missions took place on the near side of the moon, mainly because of the landing on the dark side of the moon. Knows very important technical difficulties.
The first problem is communication. The Earth is not visible on the other side of the Moon, so it is necessary to connect the probe to the Earth via a satellite in orbit, which is a test for relay technology. The satellite has launched a "Qiao distortion" to transmit signals from the moon to the Earth. The second problem is that the terrain on the dark side of the moon is very rugged, with hollows everywhere, making the landing very difficult. The landing techniques of the United States and the Soviet Union of the last century were known as "landing on the blind," that is, say a blind landing without locating the landing. This method may be feasible on the moon's side, but due to the large number of holes, craters and rugged terrain on the other side of the moon, a random landing will overturn or destroy the vehicle. This time, the vehicle made an intelligent descent to avoid obstacles, clearing the terrain and automatically adjusting its trajectory and speed after reaching a certain height on the Moon to avoid various obstacles and make a successful landing.
Zhang told our correspondent that these efforts are of great importance and value because the hidden face of the moon is closer to the geological age and the study topography and geological composition is very important for the study of the origin and development of the moon. In addition, the hidden face of the Moon is isolated from the radiation emitted by the Earth, an environment conducive to the realization of astronomical astronomical observations.
Zhang said that the probe is currently collecting and monitoring data and that scientists will draw the results with the help of a large number of calculations to reveal more moon secrets in order to respond to people's curiosity. vis-à-vis the space.
Zhang said China has independently developed many of the key techniques of the Chang-e probe, the first of its kind in the world, including long-range signal relay, landing, displacement and other techniques. lunar.
Li, who is responsible for the design of the Chang-e-4 landing vehicle, was born in the 1980s and earned his PhD from Tianjin University in 2009, before joining the Fifth Academy. from the China Science and Technology Foundation. Li Chang said that the probe Chang & eh ah was characterized by many advanced technologies, including precision landing technology. His team has devised several ways to avoid obstacles so that the vehicle can automatically complete the entire landing process. Speed, distance and three-dimensional measuring instruments were installed on the vehicle on landing in order to badyze the conditions on the moon, according to the badysis data, which modify the speed , the altitude and the landing position of the vehicle. Lee said that the process of probing, badyzing, and controlling oneself is an artificial intelligence technique that people talk a lot about. It is the first time in the history of humanity that this purification is developed independently by China.
Mr. Li also mentioned the technique of measuring the temperature on the moon during the night and this technique that China first measured and collected the temperature data on the moon during the night. There is also a navigation technology to land on the dark side of the moon and other technologies developed independently by China.
Zhang said that the probe Chang & # 39; e-4 also carried loads of Germany and Sweden to serve as a model for successful international cooperation, stressing that China still interested in international cooperation and that the National Commission for Science, Technology and National Defense Industry had collected the Chang'e. Zhang said that thanks to international cooperation this time, scientists in China, Germany and Sweden had exchanged and benefited from each other technically, expressing their aspirations for increased cooperation in the exploration of deep space and deep space.
The fourth stage of the lunar exploration project aims to build a long-term research station on the moon and could be located near the moon, hoping that other countries will participate in the mission to carry out common tasks and optimize the use of the station. On more scientific results, as well as the continuation of international cooperation in the future.
Our goal is space, and the human journey of deep space exploration is still in its infancy. As part of the concept of peaceful development and joint use, China's space exploration project is progressing steadily and sustainably. The China National Commission of Science, Technology and Industry for National Defense announced that China would execute the Mars exploration program in 2020. China should send a spacecraft into Martian orbit to carry out the landing mission and deploy a mobile vehicle on Mars.
Chinese space professionals are committed to quality, adhering to a rigorous work style, independent innovation and an open attitude of international cooperation, in line with the trend of Chinese economic growth to achieve high-quality development .
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