What is the day of the day with the Temple of the three docking?

What is the day of the day with the Temple of the three docking?

April 20, 2017, China's first cargo spacecraft on the 1st by the Long March 7, a new generation of medium-sized carrier rocket from Hainan Wenchang space launch site successfully into space.
Day boat on the 1st into the track, plans to run with the track in the Temple 2 space laboratory has three rendezvous and docking. 2 months after completing the first docking and on-the-spot propellant, the day boat 1 will be routed to the front of the Temple 2, and then the second butt is raised again. It takes 5 days from preparation to completion. After the completion of the flight test, the day boat 1 and Temple 2 again, the two aircraft will fly independently for 3 months. During this period, Tian Zhou 1 mainly completed carrying space science experiments and technical tests. 3 months later, day boat 1 and Temple 2 on the last docking, verify the independent fast rendezvous and docking technology, requires two spacecraft in a few hours to achieve docking.
What is the day of the day with the Temple of the three docking? These technologies are the protection of information Figure: On the 1st and Temple No. 2 docking diagram.
The "Sky Boat" cargo spacecraft consists of cargo tanks and propulsion tanks, in which cargo cargo, equipment, propulsion cabin provides power for cargo spacecraft, propulsion control and loading of propellants. Its length is 10.6 meters, the maximum diameter of about 3.35 meters, the solar cell wings after the maximum width of 14.9 meters, the maximum load of the whole ship up to 13.5 tons of weight, is the largest in China so far, the heaviest weight for manned space missions The cargo spacecraft. It includes 13 sub-systems, up to 6.5 tons of cargo transport capacity, propellant addition capacity of more than 2 tons, with independent flight capacity of 3 months.
Its carrying capacity is designed according to the size of the space station, and can be the smallest structural weight to achieve the maximum load capacity, cargo load ratio of 46%, reaching the world advanced level.
The "Sky Boat" series of cargo spacecraft using the type of spectral scheme, designed the fully enclosed cargo cabin, semi-sealed cargo compartment, fully open cargo cabin and propulsion cabin 4 modules, can form a fully sealed, semi-sealed and fully open cargo spacecraft 3 Type spectrum, the future can meet the space station of different cargo transport needs. Modular design can improve the ability of cargo spacecraft to adapt to the task, to facilitate the task to expand, so that the construction of spacecraft similar to "building blocks." As the inter-module technology and products can be shared and common, thus reducing the development costs, shorten the development cycle, through limited flight test to quickly improve platform reliability.
China's first cargo spacecraft day boat designed to be fully sealed type of spectrum, which opened our manned spacecraft type of the design of a precedent, cleverly solved the manned spacecraft high-risk, high standards, high demand and small sample of the , So that the design of manned spacecraft is more standardized and more predictable, is the manned spacecraft generalization, mass production, serialization of the development requirements and future trends.
Before the launch of the sun boat 1, master the rail propellant addition technology in the country only Russia and the United States, which, in addition to the track application of only Russia. At present, the European Space Agency, Japan and other positive research is exploring this. In the day on the 1st of the space with the Temple of space on the implementation of propellant in the rail to add, break and master this technology, China will become the world's second master of the technology of the country, for our space station assembly and long-term Operation cleared the last obstacle on energy supply issues.
It is one of the key technologies for the construction and operation of space stations to ensure that spacecraft can dock with space stations from multiple directions. The day of the No. 1 cargo spacecraft around the Temple of space space on the 2nd of the free fly is to verify the technology will be built for the space station to build more experience and data for the future complex docking to prepare. Day boat No. 1 in the first intersection with the Temple 2 for 2 months after the dock will be evacuated Temple 2, along with the Temple 2 180 ° turn, through the allied around the fly, speed up the front of the Temple 2, from "Front" side and the temple -2 for the second docking.
And Shenzhou 10 manned spacecraft in the ground personnel to support the fly around the different, the day boat-1 cargo spacecraft around the process of guidance, tuning, etc. are on board the software to complete their own planning, that is, when the issue around the fly order , On the No. 1 on the guidance of the navigation and control system of the computer began to independently plan around the fly trajectory, independent control of the orbit, automatic gesture maneuver, no ground personnel intervention, can be described as "smart" and "self" a lot. This autonomy not only greatly reduces the ground support staff's work intensity, more importantly, can be achieved outside the autonomous area around the monitoring and control area. If the Shenzhou 10 around the fly is "led" children learn to walk, then the day boat 1 cargo spacecraft around the fly is "watching" the children walking their own.
Although the space around the fly is very exciting, but also implies a huge risk, two weighing tens of tons of aircraft in the high-speed flight process to complete the "up and down circle" and "turn with the bucket", the biggest risk is the collision. Therefore, the requirements of both the trajectory and attitude must be precisely controlled. In addition to avoiding collisions, it is necessary to plan the optimal flywheel trajectory to complete the orbit control at a specific location and reach a predetermined location at a predetermined point in time to consume as little fuel as possible. At the same time, the spacecraft also according to the state of the target aircraft for collaborative control, including the relative position, relative speed, relative attitude, relative angular velocity, all factors must be "perfect", which requires high reliability and security, high Reliable control system products and intelligent software with independent fault diagnosis and system refactoring capability.
At present, China's conventional rendezvous and docking technology takes two days or so to achieve the target aircraft and tracking aircraft docking, day boat 1 will carry out independent fast rendezvous and docking test, the rendezvous and docking time control in 6 hours or so, Out of the "ordinary train" into the "high-speed rail" a big step, so faster, more comfortable, more secure transport of goods.
The benefits of fast rendezvous and docking technology are: from the human side, fast docking can shorten the astronauts in the spacecraft in a small space in the retention time, reduce the astronauts unnecessary physical and energy to pay, so that manned space flight becomes more comfortable, Comfortable from the mission point of view, fast rendezvous and docking to ensure that scientific research products, especially biological agents and other goods can not be long-term transport as soon as possible to reach the space station, which may be critical for some tests; from a security point of view , Which is conducive to improving the reliability of the flight of the orbital spacecraft, reducing the consumption of resources generated during the rendezvous and docking process (including the track control, etc.), to a greater extent to protect the future space station security, convenient space station on the incident Of the emergency treatment, if the space station and other spacecraft meet the emergency situation, fast rendezvous and docking can quickly repair and emergency rescue work.
Master the efficient and strong adaptability of the fast rendezvous and docking technology, so that the spacecraft to self-guided and control-based, need to break through the spacecraft autonomous navigation orbit, orbit, independent rapid guidance technology, the complex measurement algorithm and remote guidance Lead the technical engineering, the original long-distance guidance section need ground intervention work by the spacecraft on the computer on the star. After the spacecraft into orbit, all the measurement track, guidance law calculation, control and implementation strategies are calculated by the spacecraft, without ground intervention, a few hours to complete the rendezvous and docking tasks. It will build a space station for the future, complete the intensive rendezvous and docking task to lay a solid foundation.