[Quality of Space Launch] Space Launch

The Long March launch vehicle, which entered a high-density launch, was successfully launched continuously in April, and successively put Beidou navigation satellite and remote sensing satellite No.6 into the scheduled orbit. What is even more rare is that the launch interval is only 7 days. Please look at The Secret Behind's success-when it was successful, Ma Xingrui, general manager and Yuan Jiajun, deputy general manager of China Aerospace Science and Technology Corporation, who was under great pressure to guide the launch at the scene, Wei Yongquan, the leader of the institute and chief engineer of the project, and the "second-in-command" of rockets and satellites all burst into some relaxed smiles.

Success is hard to come by. China Remote Sensing Satellite No.6, the first satellite, plays a key role in connecting the preceding with the following, and is an important satellite to make technical reserves for subsequent satellites. In order to make "success in sight" truly "success in hand", seven days before launch. The work of the launch test team is more intense and busy.

General Manager Ma Xingrui and Deputy General Manager Yuan Jiajun visited the site in advance to study, analyze and find hidden dangers with the launch test team, so as to be stricter, more detailed and more realistic. The leaders of the group company and the launch site headquarters have also listened to the reports of the "two generals" system for many times, carefully directing and making decisions, carefully organizing and deploying them, and ensuring that the goals are highly consistent.

Chief Engineer Zheng He, Chief Commander of Rocket, talks about "1234" and "Closed-loop Management"

It is easy to succeed once, but it is difficult to succeed again. The launch of China Remote Sensing Satellite No.6 is a severe test for the Long March II C launch test team, which is known as the "golden rocket", because it was successfully launched for 3 consecutive times.

The second day after the rocket launch test team arrived at Taiyuan Satellite Launch Center, a task mobilization meeting was held immediately.

According to Commander Zheng He, the outstanding feature of this rocket launch is that the secondary technical state has changed the most in recent years. Therefore, according to the technical status and characteristics of rockets, from the perspective of quality control, two forms of combing are adopted: "bottom-up" and "top-down". "Bottom-up" means that designers combine "double thinking" to make suggestions. In this task, each post * * * filled in the 1 18 form, of which 22 "double thinking" forms put forward 39 suggestions, and then discussed and implemented them one by one. "Top-down" means that the "two general managers" combine the technical characteristics and working conditions, pass the expert review, and implement the projects to be reviewed one by one. Through "bottom-up" and "top-down", quality closed-loop management is effectively formed.

According to the document requirements of "Nine Innovations" and "Aerospace Model Risk Analysis and Control Requirements" put forward by the group company, targeted work has been carried out in the joint detection of satellites and arrows and test coverage. In particular, compared with the "nine major innovations", 80 items were sorted out. Through the review of "Nine Innovations", six tasks to be done at the site were defined and implemented one by one after the rocket entered the site. Success is not equal to maturity, and maturity is not equal to reliability. When the rocket launch test team completes the "prescribed actions" that must be done in previous launch tasks such as "double inspection" and "double inspection", it also actively combines its own work and equipment products in charge to refine the process.

As the core component of the launch control system for rocket ground test, the Long March II C rocket adopted the whole network system for the first time. Because it is a new system, the work of the two launch test team members is from scratch, one is responsible for the system, the other is responsible for the software, and the two are doing the work of several people. The development and smooth operation of the overall network laid the foundation for the long-range test and launch control of the follow-up mission of the Chang-II-C rocket.

16 members of the launch test team from 2 1 1 factory insist on holding technical exchange meetings every day, and technicians, dispatchers and workers discuss the work in detail, inspiring each other, reminding each other and making up for each other. They also put forward the concept of "three essences", that is, careful organization in advance, careful operation in the event and careful evaluation afterwards will get twice the result with half the effort.

This time, the rocket engine developed by the Sixth Hospital has greatly changed its technical status compared with the last mission due to the addition of the attitude adjustment engine. Only anti-heat treatment was added in 89 locations. In order to ensure the reliable flight of the engine, a strict workflow has been established in the detachment. Participants should be familiar with these rules. When workers operate, designers must give guidance and cooperation at the scene, and full-time inspectors should check and confirm them one by one to ensure the safety and reliability of thermal protection treatment. According to the requirements put forward by the "two general managers", the simulation calculation of engine outlet external flow field can not be completed by field strength alone. Therefore, with the strong support of the rear and the close cooperation of the front and rear, this work was successfully completed.

On one wall of the main hall of the satellite launch test team's resident building, a column with the title "Ensuring the success of Telesix, We Promise to the Motherland" is eye-catching, with a letter of commitment from each member of the satellite launch test team. The success of the satellite launch confirmed the determination of the astronauts.

China Remote Sensing Satellite 6 is a brand-new model and the first satellite in this satellite series. There are many difficulties to be overcome in the development process. For example, difficult overall design, technology, structure, thermal control, power supply, attitude and orbit control, data transmission system, payload, whole satellite electromagnetic compatibility and so on.

As the captain and commander-in-chief of the satellite launch test team, Yan said: There are so many problems in the development of this satellite from the beginning. The development team is new, with young people accounting for 4/5 and newcomers taking part in the launch test for the first time accounting for 1/3. According to the characteristics of the launch mission, the launch test team put forward six zero targets, such as "zero mistakes in organization and command", "zero mistakes in operation and assembly", "zero defects in power supply" and "zero failure for various tests", and established five organizational systems, namely, command and dispatch, quality management and operation, security and confidentiality, ideological and political work and logistics life support.

Facing the launch test, it is very difficult and the task is very heavy. Although the satellite launch test team has done a lot of fruitful work in the early stage, it should continue to adhere to the "cautious" attitude and work style in the follow-up work. At the same time, the satellite launch test team carefully studied the spirit of the relevant documents of the party group of the group company and the requirements of "new 28" and "new 10", analyzed the satellites, took measures at risk points, and controlled risks, and did a lot of work. In the implementation of the "Nine New" requirements, more than 10000 data were compared only by analyzing the quality reliability data.

The satellite launch test team made a decision to carry out the "double thinking" activity, and put forward the requirement to carry out the "double thinking" activity throughout the launch test. Ye Li, the class teacher, said with emotion that she had "three rounds of double thinking" before and after, and gained a lot.

The first round of "double thinking" activities was carried out on the special train entering the venue. Through "review" and "pre-judgment", after several rounds of coordination and arrangement, * * * put forward 40 questions, all of which formulated relevant countermeasures, defined the confirmation requirements, and incorporated relevant measures into relevant technical documents and implemented them according to the requirements of the node.

The second round of "double thinking" activities began on March 12. After summing up, * * * put forward 28 "double thinking" problems, 7 of which were included in the flight control test work plan, and the rest were implemented in the process according to nodes.

In view of the quality problems found in the launch site, the third round of "double thinking" activities was carried out in depth. It is mainly to check the implementation of the measures for the problem of "double thinking" in the previous stage and implement the changes related to the technical status in the technical documents. The problems listed in the "three rounds of double thinking" have been implemented before the launch.

Chief commander Yan felt that, as the first star of this model, he seldom worked overtime during the electrical test of the final assembly of the launch site, mainly because of the scientific work planning of the launch site, more drills before leaving the factory, more research before work and meticulous work. At present, everyone strictly follows the planned nodes. In view of the characteristics of personnel, the "two general managers" arranged 26 training lectures on quality control, technical safety, assembly technology, flight procedures and flight control tests while ensuring the main line work, so that each team member clearly knew what to do, why to do it, how to do it and how to do it well. Before each electrical test, the detailed rules shall be studied at least three times, and the final assembly process documents shall be studied nine times by relevant personnel. I learned the rules of the make-up exam five times before making it up. Repeated study is to unify one's thinking and understanding in the discussion and put an end to wrangling. 16 planning node and 12 quality node were successfully completed.

The satellite launch test team also hired six old experts in general, orbit, structure and quality to form an expert group, serving as technical consultants for the test work, conducting technical checks on key sections that affect success and "passing on the help". Young technicians constantly absorb the nutrients of specialty, style, technology and specialty from old experts.

Aiming at the problem that two screws and washers are missing after the whole satellite vibration test, the "two general" system actively responds. While taking decisive emergency measures, we should firmly grasp this problem, hold an emergency meeting immediately, and carry out the "four rectifications" of "thinking, style, discipline and quality awareness" in the satellite launch test team. The satellite launch test team also conducted an in-depth review of the types, quantity, assembly process and original records of the fasteners on the satellite, and confirmed that all the screws used on the satellite were in a reliable fastening state and the quality was guaranteed.

It is the first time in the history of satellite development in the Eighth Academy to compile the log of satellite launch test team. The log records the daily work of the satellite during the launch site. This move by the launch test team has made full preparations for the subsequent satellite optimization process.

Before the launch, the words of the commander-in-chief Yan represented the determination and confidence of the players: "unite as one, overcome difficulties and serve the motherland."

Hard work is sweet to the spring rain, and Didi pays. Indeed, the launch test team wrote a perfect answer sheet with practical actions.