For the first time, what challenges are faced with five B facing

Long March 5 Y Yao Three Launader Rocket China Lauding Rocket Technology Research Institute Photo Conferry

On July 24th, the Long March 5 Yao Three Load Rockets (hereinafter referred to as "Long Five B"), which was developed by the China Lauding Rockets Technology Research Institute (China Aerospace Technology Group Co., Ltd., "Rocket Institute"). The space station asked the sky experimental cabin to lift off at the Wenchang Space launcher. This is the first time that the large low -temperature hydrogen oxygen rockets in my country have performed the matching task of meeting. It is difficult to "piercing a needle lead" in space. To this end, the long five -B rocket improves the performance from the aspects of optimizing the pre -shooting process, the expansion of the launch window, and the release capacity of the carrier, and ensure the successful success of the task.

From "series" to "parallel"

Qi Tian's experimental compartment and the core compartment need to be connected to the rail assembly through the meeting, so they put forward the launch requirements for the "zero window" for the Rockets. The long five -B is a low -temperature rocket, facing the problem of low -temperature pushing agent injection problems and complex predetermined processes, which is much more difficult to implement zero -window launch than normal temperature rockets.

It turns out that each system can only complete the pre -shooting instructions in order and consume time waiting for the previous process. "It's like facing the time -to -time test papers for limited time. Once you stuck on the simple question in front, the subsequent question scores are high but cannot be done, and it seems to be in hand." The Vice President Lou Liang of the Rocket Dean Five B Rockets, Lou Liang.

In order to run with time, the design team carried out a special confirmation of the influence of the pre -processing process that adapts to the "zero window" launch requirements, and conducted a special confirmation of the relevant impact of the full arrow's pre -shooting process, optimized content, and the overall movement of the launch window. "We change the work with high coupling of each system from 'series' to' 'parallel"' to reserve 2.5 minutes of fault treatment time before the rocket launch. Once exposed some problems before ignition Essence Liu Bing, the overall deputy director of the Rockets Dean Five B Rockets, said.

From "chasing train" to "multiplier high -speed rail"

For the first time, the rapid meeting and docking tasks are required to be required to achieve quasi -point launch and accurate tracks with higher reliability, and to ask the skycase to accurately enter the transfer track with the core cabin and co -track. In Liu Bing's view, this is like the train arrives. "Passengers needed 'chasing the train' before they could find their own compartment. The current high -speed rail was accurately marked with landmarks."

From the "chasing train" to the "high -speed rail", the reduction of the trail accuracy deviation provides better protection for the connection between the space station cabin section, and also puts forward new and higher requirements for the rocket's power, structure and control system deviation control level.

Aerospace launch is the result of system coordination of rockets, launch stadiums, ground and other systems. In order to ensure the reliable launch of large low -temperature rockets, the design team expanded the original zero -emitting window to 2.5 minutes. According to Wang Jianming, the Rockets Dean's Five B Rockets Rockets, the narrow window ignition can improve the reliability of the Rockets, but because the earth continues to rotate, "'to overcome the impact of the earth's rotation, the rocket needs to have the deviation correction ability of the take -off time. "".

To this end, the design team uses the gesture to control the optimization and composite guidance methods of the long -five B, which greatly improves the stance control accuracy of the rocket. After ignition, the Rockets rely on advanced guidance technology to continuously adjust the ballistic and go straight to the space station. "For example, the basketball thrown out can continue to modify the trajectory of the basket, the wind speed, airflow and temperature of the basket, the wind speed, the airflow and temperature of the temperature, and go straight to the basket." In the view of Qian Hang, the rocket science expert of the Rocket Academy, it is still a bit like automatic like automatic like automatic expert Driving the car, "Just five B's" cars' weigh hundreds of tons, and the speed is inestimable. It is not easy to achieve 'autonomous driving'. "

From "big bags" to "easy to play"

How big is the capacity of the carrier rocket, the stage of aerospace.

As the rocket with the largest near -ground rail loading capacity in my country, the near -ground orbital carrier capacity of the long five B is more than 23 tons. This time, the heaviest load in 2022 -Ask a romantic "space kiss" in the test cabin. This is also the first time that my country's space station has greeted the spacecraft in a state.

Qi Tian's experimental cabin uses a fast meeting to form a combination with the space station Tian and the core compartment. The entire process is about 6.5 hours. The fuel -changing rail consumption of the cabin section is required to meet the docking requirements, which will cause losses of the rocket loading capacity.

In order to carry more advance agents and living materials to maintain space stations at the rail operation, the design team further evaluated and converted the long five B, and threw away the "burden" in the arrow body to release greater carrier capacity for the rocket. "If the launch of the rocket is compared to traveling tourists, then it was far away, and you need to carry large bags to ensure clothing, food, housing and transportation; now it is more like a temporary business trip, and you can easily bring the necessary items to set off." Liu Bing hit it. " For example.

From "tandem" to "parallel", from "chasing train" to "high -speed rail", from "big bags" to "easy to play", long five -B rockets have high demand for labeling reliability and high accuracy requirements for tracking accuracy requirements The three major tasks are required to be high, and successfully complete the first meeting and docking tasks, and set a beautiful "kiss of heaven" for Chinese aerospace. (Guangming Daily All -Media Reporter Zhang Lei and Chen Haibo Correspondent Dong Jiaying)

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