Flying Dream ｜ Innovation+Ingenuity, China Space Station will write the masterpiece of overall design into space!

　　At 4: 27 on November 1, 2022, with the Mengtian experimental module, Tianhe core module and Inquisition experimental module hugging each other in space, the last module of the on-orbit construction stage of China Space Station was fully equipped!China Space Station painted a magnificent and unique master design masterpiece in the boundless space, and wrote another brilliant pen in the 30 years of manned space flight. Astronauts remember that the General Secretary of the Supreme Leader wrote back to the youth team of the space station construction, and once again reported to the motherland with success!

　　Adhering to the system engineering thought put forward by Qian Xuesen, the founder of China’s space industry and the first president of the Fifth Academy of Sciences, after 30 years of manned space flight and more than 10 years of space station development, astronauts have drawn the grand plan of "building a space home" into their hands, and finally cast it into a heavy weapon with wisdom and sweat, which will shine in history. Behind the heavy weapon isThe unique and natural overall design of China’s space station system is another innovation leap for China’s spacecraft system design, which shines with China’s wisdom and shows the beauty of ingenuity.Among them, the Fifth Academy of Aerospace Science and Technology Group, as the overall institute of space technology in China and the overall design and development unit of space station system, plays an irreplaceable role.

　　"The result comes from the beginning, and the starting point leads to the end point." Wang Xiang, the system commander of the Space Station of the Fifth Academy of Sciences, believes that scientific thinking precedes engineering practice for system engineering practice, which reflects the strategic view of building a space station in China based on the present and focusing on the long term. In such an unprecedented complex system engineering as the space station,The overall design is the "faucet" and "lifeline", and all the work begins here and ends here..

　　Go back to the place where the dream began. At the beginning of the dream of "building a space home", after decades of engineering practice, China’s space technology formed a set of systematic engineering methods and accumulated rich experience, but it was rejected by the International Space Station, facing severe situations and multiple constraints such as technical blockade and embargo on key components. How to assemble several large spacecraft in orbit reasonably and efficiently? How to realize long-term stable operation in orbit with low cost and high efficiency? How to break the foreign blockade and break through key technologies independently? … … A series of unprecedented problems are in front of the overall designers of the Fifth Hospital.

　　"We must be independent and build a space station by Chinese’s own strength!" Yang Hong, chief designer of the space station system of the Fifth Academy of Sciences, firmly believes that "it is necessary to break the blockade by relying on self-reliance and self-improvement, and put forward an assembly and construction plan suitable for China’s national conditions by enhancing the top-level design and aiming at the planning of the frontier system." He led the overall design team of the Fifth Academy,Adhere to the design concept of "1+N=1" and take the design idea of "moderate scale and room for development", embarked on a design journey of ingenious release and vitality. In the end, they creatively put forward the plan of "using the rendezvous and docking of the cabin and the indexing manipulator for plane indexing, developing a large-scale combined manipulator and cooperating with astronauts to build large-scale facilities outside the cabin". This unique overall design scheme of China can enable China to complete the on-orbit assembly and construction of a large space station with a mixed configuration of building blocks and trusses without large transport vehicles such as the space shuttle.

　　From ideal to reality, we need a scientific and unified technical system to effectively organize. So,"One system overall, three cabin overall plus a professional subsystem team"Our engineering organization structure, such as magnificent buildings, supports the "overall unified" management, makes the generalization rate of Tianhe, Zhentian and Mengtian reach 80%, and promotes the optimization of the system scheme. System design and engineering management are deeply integrated and complement each other.

　　The blueprint is drawn and spread steadily. After the combination of the sky and the sky forms an "L" shape, the dream sky is in place, which makes the third module form a reliable "T"-shaped "core assembly" and become a basic part of the space station, which will lay a solid foundation for the subsequent expansion of the optical module such as the sky survey. In the future, the expansion module can be assembled with the help of the mechanical arm, and the expansion configurations such as "cross" and "dry" can be described as ever-changing. "However,The process and result of change all come from design, and change without departing from its original religion.. "Wang Xiang commander said.

　　Heaven and earth are born together, and everything is one. The ancients emphasized "harmony between heaven and earth" and regarded the whole universe as a big system. The wisdom of traveling through time and space in this way is fully reflected in the overall design of the space station system. Plan a domain from the overall situation and serve the overall situation with a domain — —Through the overall design of creating maximum value under numerous constraints, the three elements of heaven, earth and people complement each other and merge into an organic whole that is interrelated and complementary..

　　Look at the sky first. Each module and the visiting spacecraft that make up the space station are independent aircrafts, which form an assembly after docking, and the whole space station is controlled and managed in a unified way by "super brain", so as to ensure the coordinated actions of each module and the spacecraft and the unified and optimized use of resources. In order to be truly integrated, in addition to completing the rendezvous and docking in structure, it is also necessary to connect the information system and the energy system to ensure dynamic grid connection, capacity sharing, and unimpeded "nerve" and "blood". In addition, through the thermal control fluid circuit, heat is also transmitted across the cabin and compatible with each other.The three cabins are interconnected and have the ability of system reconfiguration across spacecraft, and the overall performance greatly exceeds the simple set of functions of each spacecraft, which has not been done by anyone in the world.And this is also engraved with the overall designer looking up at the sky, flashing ingenuity, and continuing to struggle.

　　On the ground, the Fifth Academy built a physical space station with the same proportion as the "Tiangong" and created it by using digital twin technology.Digital space station, together formed."sky-ground-digital" three-station cooperationThe new operation mode is driven by flight data in real time and carries out on-orbit state prediction and trend evaluation, so as to escort all the way with solid basic ability. The Fifth Academy also transferred the backbone to set up a flight control team. Since the eve of the launch of Tianhe core cabin, they have been insisting on the "space station work and rest" with three shifts and continuous rotation.Monitor the state of the sky 24 hours a day, meticulously and silently guarding.. Over the past year or so, this team has withstood the tests of various complex on-orbit configurations and various tasks, and has been through many battles and has excellent skills, which will provide reliable support for the follow-up long-term on-orbit operation tasks.

　　Man is a decisive factor in the space station system. No matter the initial design of the space station or the whole process of each mission,The design team of the Fifth Academy will fully communicate with the astronauts and carry out the people-oriented concept to the end.. On the one hand, based on the needs of astronauts, the comfort and convenience are continuously improved through design to create a space home that makes astronauts healthy and happy. Clean and tidy cabin environment, material management system with code scanning identification, two-way video between heaven and earth, intelligent kitchen, etc. all contain designers’ ingenious ideas and a lot of hard work. On the other hand, ensuring the safety of astronauts is the primary task, and safety and reliability should be systematically considered at the beginning of design. Yang Liwei, a space hero, said "I trust you" to the overall designer before his first flight. This sentence is both the best affirmation and the heaviest responsibility for the people in the Fifth Academy. "Man is a guest of heaven and earth". In the China Space Station project, heaven and earth have achieved harmonious coexistence and mutual achievement.

　　The overall design of the space station system, not only has the heart of the universe, galloping between heaven and earth, but also has been repeatedly encountered with the thorny problem of "elephants dancing in porcelain shops", and even has the bottom line and red line that the horizontal knife immediately vowed to hold. And all this has been insightful and skillfully resolved by the overall designer with a developmental vision and dialectical thinking.

　　As early as the beginning of the space station mission, Yang Hong realized that the key core components must be the bottleneck restricting the long-term sustainable development of the space station. Adhering to the viewpoint of leading the breakthrough of basic technology with major national models, he led the technical team to station the first-line research on component development.In one fell swoop, it broke through the technical bottleneck of 5.5 million aerospace components and solved the problem of "sticking neck" of core components.. This move not only realized the complete substitution of imported components, broke the blockade barrier, but also forced an international component giant company to actively comply with our standards to produce products. At present, the core components of the space station system have all been localized, and the initiative is really in our own hands.

　　"Building a station by innovation and building a station by science and technology", the Fifth Academy firmly followed the road of self-reliance and self-improvement by science and technology, laid out a demonstration project of the space station for aerospace intelligent engineering several years ago, opened up a full-cycle and three-dimensional model digitalization process in the development process, and opened up a new digital development model, which shortened the development cycle by 30%. The team persistently pursues Excellence and gathers wisdom to tackle key problems, and has conquered a series of key technologies with independent intellectual property rights, such as crawling robotic arms, and achieved transcendence in key performance indicators such as power generation and power supply, material recycling efficiency and operation economy, making one miracle after another in China dazzle the space and radiate dazzling innovative light.

　　Faced with the problem of system reliability, the people of the Fifth Hospital are committed to developing the overall design with high quality, high efficiency, high benefit and all-round development, concentrating on research and ingenuity.A comprehensive working system of "integration of safety, reliability and maintainability" of on-orbit spacecraft was established.. This kind of maintenance design, which does not interrupt flight and simplifies complexity, realizes the overall system optimization and function enhancement under various constraints.

　　The construction project of space station is a typical case of exerting the advantages of the new national system. Under the strong leadership of the CPC Central Committee with the Supreme Leader as the core, China’s space industry has improved and improved the system engineering system of national cooperation and major research, and the space station development team has been able to scientifically organize cross-industry and interdisciplinary intelligence research, and unite thousands of units and tens of thousands of scientific and technological workers across the country to make great cooperation. The whole country casts heavy equipment, and the heavy equipment is completed.The construction of China Space Station is undoubtedly a vivid example of concentrating on doing great things in the new era.

　　General Secretary of the Supreme Leader pointed out in the Party’s Report to the 20th CPC National Congress that "we should accelerate the implementation of innovation-driven development strategy", "we should accelerate the realization of high-level scientific and technological self-reliance" and "we should accelerate the construction of a space power". Facing the new journey, the people of the Fifth Academy will remember that the General Secretary of the Supreme Leader wrote back to the youth team in the space station, and write more magnificent masterpieces in space, making new contributions to the realization of China’s high-level space science and technology self-reliance. We believe that the prospect of empowering a beautiful space home with the overall design of "innovation+ingenuity" will be fully interpreted and vividly displayed in more space technology fields.