Chapter 730

Because there is no atmosphere on the moon, we can't use the parachute to slow down the speed. We can only use the variable thrust engine to slow down the speed while landing. The difference between the landing of Geng chang'e-3-4 probe is that the landing weight of the Moon Palace pathfinder-1 probe of the infinite gravitation group is heavier!

This makes the landing of "Moon Palace Pathfinder" 1 more stringent requirements on the performance of variable thrust engine, not only requires greater thrust, but also requires higher accuracy of engine thrust change!

Of course, it does not mean that a good variable thrust engine can guarantee the smooth landing of the detector. This is a very systematic project, which involves many technologies.

The dynamic descent process of the detector is a process of short time and great speed change, which can not be controlled by the ground in real time. In this regard, with the help of national Chang'e engineering technology team, infinite gravity group has designed and customized a special guidance, navigation and control system.

A special sensor is designed for the guidance, navigation and control of this guidance, navigation and control during the landing phase by using a special sensor to measure the speed, range and identify the terrain on the moon.

The equipment used in this system includes inertial measurement unit (IMU) for autonomous navigation, laser range sensor, microwave range sensor, microwave speed sensor, optical imaging sensor, laser 3D imaging sensor, image data processing computer, horizontal mobile thruster, etc.

The key is to design a special obstacle avoidance program for this system, which includes approach phase, hover phase, obstacle avoidance phase and slow descent phase.

With the help of four lunar orbiting satellites named "four leaf grass" by female scientists in deep space laboratory, the infinite gravity group not only digests and absorbs the detailed lunar satellite exploration data brought by the national Chang'e project, but also further verifies these data with its own company's more advanced exploration satellites.

The development team has fully considered the impact of lunar soil physical and mechanical properties on land, stability and physical and chemical characteristics of lunar dust, and developed a new landing buffer system with special materials, design and technology to solve the above problems, ensure that the detector will not overturn or collapse in a certain attitude range during soft landing, and provide the detector with a platform for its work Strong support.

Scientific research can't be tolerated at all. Even if we all know that the information provided by the national lunar exploration project will not be a big problem, but the data given by others is different from the data detected by ourselves. The scientists team of the company still believe in the data they have detected!

In this regard, the experts sent by the national lunar exploration project to the company for cooperative research were not angry, but were particularly gratified and supported. At the same time, they also praised the scientific research of infinite gravitation group to make progress in such a short time.

Of course, what I envy more is the magnanimous appearance of the infinite gravitation group. In order to save the time of data detection, it immediately launched four "four leaf grass" orbiting the moon exploration satellites. The detection data are sent back and forth every day, and many data materials are not even mastered by them. After all, the exploration satellite technology of the infinite gravity group is better than that of their previous launch The satellite is a lot higher.

This is also an important reason why China's lunar exploration project is willing to cooperate with infinity gravity group in an all-round way. The investment scale and technology conversion speed of infinite gravitation group are too fast. If we don't provide timely help at the beginning, if we cooperate later, the treatment will certainly be different.

With sufficient data support, the technical advantages of the infinite gravity group were immediately displayed. The simulated landing test of the artificial intelligence system enabled the protest team to clearly grasp all possible accidents during the descent process, and preset these possible accidents in the control system, so as to ensure that the whole lander can not automatically descend There will be any accidents.

When the live video of the surveillance camera of Lunar Explorer 1 is connected to the live line, everyone knows that the most important moment is coming!

"Switch to autonomous landing system!" With the command of the commander, the landing officially begins!

The whole lunar Explorer-1 detector began to enter the set landing procedure, and then under the independent control of the program, it began to ignite the thruster engine!

In order to control the descent process of the detector more accurately, the number of thruster engines is subdivided into 12 engines. Among them, 8 engines are attitude control engines distributed at four corners, and the rest are the main engines at the bottom. The number of them is 4. Therefore, the main reason is that the weight of "Moon Palace Pathfinder" 1 detector is It's too heavy!

Of course, even if the weight is so large, but with the engine technology of infinite gravity group, if there are two main engines, if one engine or two engines are used, the engine of the detector fails during the landing process, then its landing will fail, which represents the failure of the launch mission.

Because of the ultra-high precision and super function of the variable thrust engine, it can only accurately perform a high-precision variable speed descent mission. If it fails or is used again, it needs to replace some precision parts. But we all know that there is no way to carry out such operation on the moon 380000 km away.Therefore, the deep space laboratory team, which was engaged in the first lunar exploration mission, had a profound understanding of their boss's crazy design of the detector's backup system, and designed two standby engines for the main landing engine, because their company's "julingshen 2" recoverable rocket's carrying capacity can give them sufficient design margin!

Of course, it doesn't mean that the design of these two spare engines is completely useless. After all the exploration tasks of the probe are completed, the two engines can be used to conduct an experiment, that is, the launch test of the probe on the surface of the moon, so as to carry out technical verification for the next recovery mission of the probe!

After all, like the national lunar exploration project, the third step of the initial lunar exploration plan of the infinite gravitation group also needs to carry out the recovery operation of the detector, which also needs such technical verification.

At this time, two of the thruster engines at the bottom of the screen began to emit blue flame. The landing procedure started to make the detector slow down at the predetermined landing site that had been explored long ago. The eight attitude adjustment engines also started to spray under the control of the program to adjust the attitude of the detector and aim at the landing point!

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