How did the test cycle shorten the six -day long seven -A rocket?

It sounds not long in 6 days, but for the rocket launch, each job must be scrambled. Because, every time the test cycle decreases, the rocket launch efficiency has improved a big step forward. On the evening of September 13th, Wenchang Aerospace launched, which was attracted by the China Lauding Rocket Technology Research Institute (China Aerospace Technology Group Co., Ltd., hereinafter referred to as the "Rocket Academy"), the Long March 7 A Yao -Wan Rockets (hereinafter referred to as "" Long Seven A Rockets ") successfully sent the Middle Star 1E satellite into the scheduled track. It is worth mentioning that through the optimization process, the research and development team members have reduced the test cycle of the long seven -A rocket from 32 days to 26 days, further improving the launch efficiency, and laid the foundation for the rocket to respond to the normalized launch of high -density launch. Essence

With the beginning of the hanging, the assembly time is reduced by 3 days

Lifting core first level, bundling helping machine, installing the core second level ... As soon as the rocket entered the field, the test team members were so busy. During the vertical assembly and unit testing phase, they improved the general assembly mode and shortened the assembly time by 3 days.

According to Wei Yuanming, the chief designer of the long -seven A rocket, as a full -low -temperature rocket, the long -seven A rocket is currently the new generation of rockets with the largest number of modules in my country. There are many and complicated parts. In the past, the team members needed to wait for all parts to prepare, and then the vertical assembly was completed. However, now the rocket core III is lifted. It is necessary to complete a number of tasks such as the installation of fireworks, the leak inspection, and the installation of the nozzle extension section, which is longer than the preparation time of the machine and the first and second levels. To this end, in this task, the team members changed the assembly mode from "in one go" to "to follow the hanging", thereby optimizing the decoration time. "Today, we first hang the booster and the first and secondary levels; in the process of waiting for the core III, insert the installation of the service mechanism of the booster and the core III; the third level has conditions, and then the lifting ... … In addition, the preparation of the preparation of the instrumental equipment on the equipment on the equipment is optimized for 1 day, which saves 3 days than the original. "Wei Yuanming explained while calculating.

Merge "similar item", grab the test time for 2 days

After the assembly and unit testing, the rocket needs to perform the system matching test and general inspection test to verify its technical performance and reliability in order to meet the requirements of the launch state. In this task, the players merged the "similar items" with a similar state test, which further shortened the testing time.

The supplementary pressure test is the last item of the system power system test. Then the first general inspection test is conducted, and both will run the mold flight program. "If the two are merged, can it reduce part of the work of the overall inspection and test?" Thinking of this, the team members were bright, but the question also followed- "Can the same test effect after the merger?"

After research and analysis, the team found the difference between the two tests, and strengthened the verification of the measurement system in the supplementary pressure test to make the test more comprehensive, and used less time to achieve the same test effect.

In addition, the team also completed the preparation work before the detection of the rocket control system and the measurement system to reduce the test cycle of the system matching system. "Through these measures, we saved a total of 2 days during the system matching testing and general inspection and testing stage." Wei Yuanming said.

Serially change in parallel, save another day after the transfer

On the day of turning, against the red flag waved by the off -line team, the long seven -A rocket stood on the event launch platform, slowly "walking" towards the launch tower. This means that the Rockets have been checked and tested in the technical preparation area, reaching a state that can be launched, but the footsteps of the players have not stopped.

In the past, it took a total of 4 days to work from the transfer to the launch area from the transfer to the launch area. This time, the team sorted out the process, changed the recovery and testing of the measurement system from serial to parallel, and reduced the work of the transition and the launch area to 3 days. Essence

"The serial changes are not fresh. The difficulty is how to determine how these processes can be achieved in parallel and are not disturbed during the work process." Wei Yuanming told reporters, "This risk recognition, planning scheduling, and on -site operation have been put forward more. High requirements. "

Carefully sort out the process before the launch, identify risks in advance, adjust the progress in a timely manner, and further determine the specific work goals ... The team adopts a series of measures to effectively ensure that the work can be carried out smoothly after the process improvement.

"In addition, after experiencing the test of the previous tasks, our understanding of the work of the long seven -A rocket is more deeper and more proficient in operation. Therefore, the coordination and adaptability of process optimization also have stronger confidence and grasp." Wei Yuanming emphasized.

From 32 to 26 days, the further shortening of the test cycle shows the continuous optimization and excellent style of the long -seven A rockets, and also shows the spirit of endlessness and perfectness of the long -seven A rocket test team. "In the future, in the face of high -strength density launch tasks, the Long -seven Rockets Pilot Team will always maintain the courage of the new and unprecedented courage, always maintain the sharpness of being good at changing and daring to innovate, and hand over a better answer sheet on the journey of building a aerospace power." Wei Yuanming said.

(Reporter Zhang Lei, a correspondent Wang Bing)

【Edit: Chen Wentao】

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