Watch The Magic Of Shenzhou 13's Return

The return of Shenzhou 13 to Earth can be said to be a complex and thrilling process. It has to go through key flight events and links such as orbital separation, push-back separation, re-entry, crossing the black barrier, opening the parachute, and opening the landing buffer engine. The return process It also has to pass the test of harsh space environment and orbital conditions. However, under the careful design of the technicians of the Fifth Academy of Aerospace Science and Technology Group, Shenzhou 13 firmly grasped the "three degrees", namely speed, temperature and accuracy, to ensure that it returned home safely.

speed, just right

The speed of the Shenzhou spacecraft in orbit is about 7.8 kilometers per second, which is close to the first cosmic speed. At such fast speeds, the final landing speed after returning to Earth must be controlled to ensure the safety of astronauts.

temperature, moderate heat

After the return capsule enters the atmosphere, it will have severe friction with the air, and the local temperature of the capsule surface can reach thousands of degrees Celsius. In order to ensure that the temperature in the cabin is still comfortable, the main means of temperature control of the spacecraft is to rely on the heat-proof structure to protect the cabin.

Accuracy is a surefire way to win

In order to make the return capsule land in the designated area, the precision of the landing point of the spacecraft must be controlled. To this end, the technicians of the Fifth Academy of Aerospace Science and Technology Group have equipped the Shenzhou 13 spacecraft with a set of "landing light work". The first is to maintain the return orbit, adjust the orbital plane of the spacecraft, and make the trajectory of the spacecraft's sub-star point pass through the return aiming point; then The return brake ensures the re-entry angle and return range through the speed increment of the brake and the time when the engine is turned on, so as to provide guarantee for accurate landing; finally, the lift control of the return cabin, after entering the atmosphere, the return cabin moves through a series of attitude maneuvers, cleverly using The lift generated by the aerodynamic force controls the heading and lateral movement, precisely adjusts the predetermined landing point, and finally returns safely.

Shenzhou 13 has successfully completed all the scheduled requirements of this flight mission, and it has been a triumphant victory. Its safe return marks the successful conclusion of the key technology verification phase of my country's space station and is about to enter the construction phase.