Source: Our Space
The TV series "You Are My Glory" is currently airing, and the scene of aerospace designer Yu Tuhe guan participating in satellite rescue has greatly addicted the audience.
"Single particle reversal" and "instruction sequence injection" are presented from the film and television dramas one by one, and the astronauts also have a kind of "other hometown and old knowledge" in front of the TV.
Is satellite rescue really that exciting in reality? Are astronauts really that smart?
Follow the editor close to the Beijing Spatial Information Transmission Center to understand the real-life version of the "Yu Tu" and "Guan Zai" story.
"Tianlu-1 04 satellite captures Tianhe, and the forward return link has been established."
On July 4, astronauts Liu Boming and Tang Hongbo successfully exited the capsule from the Tianhe core module node module, and when watching the live broadcast, everyone heard such a sentence.
When relay satellites provide space-based measurement and control services, they need ground scientists to perform complex calculations, control the antenna on the satellite to point at the spacecraft, and establish a data connection with the spacecraft, which is called "capturing the target".
Everyone says: "Capture" is the most romantic love story of relay satellites to spacecraft.
The operation and control team of Beijing Space Information Transmission Center is responsible for the important mission of "accurate capture in the sky and stable measurement and control on the ground", and they not only have to implement refined platform management for relay satellites, so that they can operate smoothly in space and perform data transmission tasks. In some emergency situations, they also need to step forward to quickly resolve the fault and escort the satellite safety.
In the team, there are three young backbones, who are respectively in charge of the three aspects of the satellite's platform, control and orbit, each performing their duties and closely coordinating, fully guaranteeing one space-based measurement and control mission after another, which is affectionately known as the "three famous catches of tianlu".
In the face of danger, we will not live up to our mission
Satellite subsystem "commander" Liu Zhun
Liu Zhun, who graduated from Xi'an Jiaotong University, has devoted himself to the field of satellite management since he joined the company.
From the satellite Xiaobai of "100,000 Whys" to the technical experts who "have problems looking for Liu Zhun", Liu Zhun has never relaxed his self-requirements in business learning, and the office building can always see him picking up the lights and fighting at night and studying hard, "doing a line, loving a line, drilling a line" is the true portrayal of Liu Zhun.
This year is the tenth year of Liu Zhun's work, as the "commander" of the relay satellite team, Liu Zhun has completed countless difficult emergency responses.
Colleagues often joke that "difficult diseases" are always directed at Liu Zhun, and he is always on call to deal with abnormalities. Behind the "full attendance rate" of abnormal disposal is Liu Zhun's sincere love for his work and full dedication.
One day in early April, the central mission hall was quiet, tianlian-1 03 satellite was ensuring the data transmission of a spacecraft, suddenly, the alarm software was red, and the satellite post personnel quickly reported the abnormality to the person in charge, Liu Zhun. "Abnormal parameter data", Liu Zhun immediately made a judgment. Although there was a plan earlier, the abnormal situation in the key circle still made everyone present sweat.
"Getting the satellite back to mission capabilities as soon as possible is the first thing to do." Faced with the dual crisis of task execution and platform stability, Liu Zhun made a secret determination in his heart to quickly formulate a "rescue" plan. "Stabilize the satellite attitude, protect the platform!" Restore the ability to capture, save the mission! With his usual calm and calm tone, Liu Zhun methodically reached the specific plan to each post.
The post personnel immediately carried out status inspection and record according to the disposal strategy formulated by Liu Zhun, and quickly prepared the instruction sheet. The tense and anxious atmosphere in the air was quietly dissolved in the orderly disposal of the team.
After more than an hour of "rescue", the satellite restored its mission capabilities. "There are still 10 minutes to go before the next lap starts, it's too late!" The control team on standby immediately began emergency capture operations. "The data link was established successfully!" There was a round of applause at the scene.
Behind the effective strategy formulation, orderly on-site command, the vigorous coordination of various posts, and the "withstanding the pressure" again and again, is the deep understanding of the satellite mechanism and mission process of "Commander" Liu Zhun, and the strong support provided by the well-trained team at critical moments.
Spacecraft operate in the vast universe, all kinds of interference, system failure can not be avoided, the disposal of sudden problems is a test of the level of satellite managers. The accurate "crosshair" of fault location, the rapid "preparation" implementation of emergency disposal, and the stable play of key moments come from the accumulation of hard work, ten years as a day, Liu Zhun uses his own actions to practice the mission of astronauts.
Thick accumulation can make hair thin
Business "all-rounder" Yao Fanfan
After graduating with a doctorate in 2015, Yao Fanfan was assigned to the satellite group and quickly grew into a technical backbone of the group through outstanding learning ability and diligent research attitude. At the same time, the heavy responsibility of the construction of the Tianchain No. 1 04 star was also handed over to this diligent and down-to-earth young man.
"There are no shortcuts to the construction of satellite systems."
During the test with the factory, Yao Fanfan was like a sponge that absorbed water, carrying pamphlets and pens with him everywhere, absorbing knowledge that could not be learned from books at any time. Opening this "treasure book" of satellite construction that year, the various knowledge points written on it seem to be a bit sloppy, and the handwriting is still somewhat difficult to read.
"There are so many things to learn to remember. I gave myself some abbreviations to save time on recording. Now I am afraid that only I can understand this note. Yao Fanfan said with a smile.
The construction of satellites is the cultivation of capabilities, and the testing of satellites is the test of capabilities.
During the on-orbit test of Tianchain No. 1 04 star, Yao Fanfan refused to relax for a moment, repeatedly pondered all the problems that appeared, and seized every opportunity to discuss and solve them with colleagues. He secretly set a goal: "From the beginning of the system construction, reduce the hidden dangers of the problem and achieve maximum optimization." ”
During the system test, Yao Fanfan followed the test and remembered the problem during the day, and worked overtime at night to think about solutions. Among them, the optimization operation of 04 satellite automatic emergency disposal is directly applied to the system construction of follow-up satellites, which greatly improves the timeliness of fault disposal and reduces the pressure on duty personnel, which is highly affirmed by everyone.
Melons knot on bitter vines. The successful completion of the arduous task of the construction of the 04 star true star has laid a solid foundation for Yao Fanfan's satellite management. In 2018, due to job requirements, Yao Fanfan was adjusted to the track group. Receiving the transfer order, Yao Fanfan did not hesitate in the slightest, "Which post needs me, I will be engaged in which post." There is no white effort, and I do a good job of controlling the post. ”
Kung Fu pays off, and in just one year, Yao Fanfan has once again become the backbone of the control profession. With the rapid development of space-based data transmission, the number of support tasks has increased significantly, and the contradiction between the shortage of satellite resources and the shortage of post personnel has become increasingly prominent, and Yao Fanfan began to think about how to "squeeze out" more available time for satellites and personnel. Coming from a satellite management background and taking root in a control position, Yao Fanfan accurately captured the feasibility of optimizing the orbit position holding mode.
The previous rail position maintained a centralized control mode, with a long task time, a concentration of post personnel, and a window period often in the late night and early morning. Yao Fanfan decomposes the orbit control process from the two aspects of satellite and control, innovates and proposes a decentralized control strategy, and achieves the same effect by increasing the frequency of orbit control and reducing the amount of orbit control, keeping the orbit position refined and decomposed into daily development, and effectively using task gap processing resources. This plan was quickly supported by the developer, and then Yao Fanfan led the team to work overtime to complete the test verification.
After the implementation of this model, all posts significantly felt the reduction of satellite resource occupation and personnel consumption, and from the effect point of view, the accuracy of satellite fixed points was more accurate, and the orbit position was maintained more quickly. As Yao Fanfan said, "there is no white kung fu", with the internal strength trained in the satellite post, under the re-polishing of the orbit control post, Yao Fanfan, who has become a composite backbone, has a more overall understanding of satellite management, so that he can constantly break through and innovate and explore in bottlenecks again and again.
Ten years to grind a sword
Li Feng, the "actuary" who focuses on the track
On July 1, Li Feng, a young technical backbone, was invited to participate in the celebration of the 100th anniversary of the founding of the Communist Party of China as a representative of outstanding astronauts because of his outstanding technological innovation and emergency response in a number of system construction in recent years.
Leaving the campus, Li Feng has been working in the track control position for more than ten years.
Although he is already a father of two children, he still has a sense of juvenile book anger peculiar to "technical control". Whenever a new person asks a question, Li Feng picks up paper and pen casually, two or three strokes to spread out the spatial coordinate system and orbit formula, and explains the principle thoroughly in a few minutes, and colleagues affectionately call him "Peak Research".
At 3:12 a.m. on May 20, a rapid telephone ringing woke up Li Feng, who was asleep.
"The phone calls made during this time period must be something more urgent and serious." Li Feng whispered to his wife next to him, and hurriedly trotted all the way from home to the duty hall. After quickly understanding the situation, he calmed the heartbeat of the runner while calmly analyzing the reason for the abnormality.
To solve a problem, you must first know what is wrong. Li Feng immediately checked the track control calculation results one by one. In the overnight calculation and analysis, Li Feng found that a parameter was abnormal, and it was suspected that there might be interference between the two payloads on the star. In order to confirm the problem as soon as possible, in the morning, Li Feng rushed to the simulation room to confirm the status and reproduce the problem, and finally confirmed with the developer in the evening that there was a root cause of interference between the two loads on the star at this time.
After the root cause of the problem is confirmed, the problem is dealt with immediately. However, the first disposal was not smooth, and the theoretical assumptions deviated greatly from the actual operation results, and the interference state could not be lifted. Li Feng led the team and satellite developers and other space-based measurement and control system orbit control calculation experts quickly set up a research group, worked together, changed ideas, re-formed the disposal plan, and finally successfully lifted the interference state in the early morning of the next day, and the satellite state returned to normal.
When everyone breathed a sigh of relief, Li Feng, who had been fighting continuously for nearly 30 hours, could no longer hold on and fainted at his post. Colleagues rushed Li Feng to a nearby hospital, and the test result was a lack of oxygen in the brain caused by overwork, and he needed to rest well.
After many understandings, colleagues learned that Li Feng's health has not been very good recently, and the doctor recommended hospitalization and observation a month ago. But he is preoccupied with his work, and he has been insisting on the task in order to ensure the task.
Li Feng said, "How fortunate and glorious it is to be able to apply what I have learned to the aerospace industry I love." This simple sentence is also the unrepentant voice of every aerospace science and technology worker who burns himself in his post.
In the face of major tasks, stronger ability means greater responsibility, in the face of urgent time, interference that has not yet been eliminated, and huge task pressure, the "three famous catches of Tianlu" have fought a beautiful battle in emergency handling with profound theoretical foundation and practical experience.
Source | Our space
The authors | Feng Lingjie, Zhang Mengmei, Wang Ran photography| Han Longpeng, Zhu Shulin