monster battlefield

Chapter 259
The strength of the Yutu lunar rover is still very strong. Based on some public information in the world, the information obtained from the 1 gram of lunar soil generously donated by the US emperor, and the data detected by Chang'e-[-] and Chang'e-[-], scientists gave it a very suitable configuration.

It is composed of 8 subsystems: movement, navigation control, power supply, thermal control, structure and mechanism, integrated electronics, measurement and control data transmission, and payload.

Its "back" has two solar panels that can be opened, and its legs are six-wheeled mobile devices, which have extremely high requirements for "wheels".

During the research and development, researchers have come up with dozens of schemes such as four-wheel, six-wheel, eight-wheel and crawler-type, and finally determined as the scheme of "six-wheel independent drive, four-wheel independent steering".

Its "tail" is equipped with an earth-moon dialogue communication antenna, a navigation camera above the head, obstacle avoidance cameras at the front and rear, and a robotic arm responsible for drilling, grinding and sampling.

Moreover, the domestic production rate of Yutu is 99.9%.

It also has the ability to climb a slope of 20 degrees, overcome obstacles of 20 centimeters, and can withstand a temperature difference of 330 degrees Celsius.

The gravity of the moon is about one-sixth that of the earth, and the soil on the surface is very soft and uneven, with stones, craters, and steep slopes.

In this environment, the lunar rover can neither skid nor roll over.

In order to overcome these difficulties, there are four panoramic cameras and navigation cameras on the "Yutu" in total.

"Observe" the surrounding environment through the camera, perceive and identify obstacles on the lunar surface, and then plan the patrol path.

When encountering a slope of more than 20 degrees, a rock higher than 20 cm, or an impact crater with a diameter greater than 2 meters, it can independently judge and avoid it safely.

Lunar rover "walking" on the lunar surface is full of risks. A large number of fine particles of lunar soil will be raised to form moon dust. Once attached, it is difficult to remove.

Moon dust may cause many failures of the lunar rover, including mechanical structure jamming, sealing mechanism failure, and optical system sensitivity reduction.

In the lunar surface topography comprehensive simulation test control room, in order to simulate the lunar environment, researchers specially transported volcanic ash from Changbai Mountain with similar material composition to the lunar surface, and hung the lunar rover through steel wires to simulate the microgravity environment.

After testing, the "Yutu" adopted a combination of autonomous navigation and ground remote control when patrolling the lunar surface. It can not only advance, turn, and retreat autonomously, but also turn in place and swing sideways to ensure unimpeded travel on the dangerous lunar surface. .

Due to the large temperature difference between day and night on the moon, the temperature is as high as 150 degrees Celsius during the day and as low as minus 180 degrees Celsius during the night.

In order to adapt to extreme environments, the "Yutu" lunar rover can withstand a temperature difference of 300 degrees Celsius by using heat transfer fluid circuits, heat insulation components, heat dissipation surface design, electric heaters, and isotope heat sources.

It takes more than 28 days for the moon to revolve around the earth, and the moon's rotation is also 28 days.

This means that one day and night on the Moon is equivalent to 28 days on Earth.

The lowest temperature on the lunar surface at night can drop to minus 180 degrees Celsius, and electronic equipment cannot work at all.

One night on the moon is equivalent to 14 days on Earth.For this reason, the researchers designed a sleep mode for the "Yutu" - 14 days of work and 14 days of "sleep".

When it's time to "sleep", it will automatically enter a dormant state to recharge its batteries, and when it's time to "wake up", it can automatically wake up and start working again.

This regular schedule of "working at sunrise and resting at sunset" has greatly enhanced the "Yutu"'s ability to survive in the harsh environment of the lunar surface.

After experiencing extremely low temperatures, "waking up on a moonlit night" is a difficult problem.Scientists design stretchable solar cells for lunar rover

It unfolds when working during the day, and puts it away at night to wrap instruments and equipment inside.

This "wrapped sleep" helps to protect various instruments from being damaged by freezing, and ensures that the lunar rover "wakes up autonomously" with remaining power, and reopens the solar panel to welcome the sun.

During the day, the angle of the solar panels of the 'Yutu' lunar rover should be adjusted to avoid being too hot by the sun.On the hottest day of the month, the lunar rover will also take a 'lunch break'.

The design life of the "Yutu" lunar rover is 3 months, which means that she will experience 3 lunar days and 3 lunar nights.

All work is to be done in "am" and "afternoon" lunar time.

It's just that no matter how rigorous the design is, various problems will still appear in the actual situation.

After more than a month of normal operation, the Yutu lunar rover experienced an abnormality. Its scientific detection equipment can operate normally, but it cannot move.

It's equivalent to not being able to move well in legs and feet, but the brain, mouth, heart, and ears are all normal.

The Yutu was unable to move after more than a month of operation. Speaking of this failure, there are two things that are not in place in the design.

One is to have an understanding of the lunar environment, but not in place.

The second is that the handling measures for possible faults are not in place.

Because scientists cannot go to the moon to conduct on-the-spot inspections, in most cases they can only rely on data analysis or direct guesses, so they have come up with two more scientific explanations.

The first possibility is that the lunar rover is designed to be light and compact, so the design is highly integrated, and there is no backup for the corresponding parts.

The second possibility is that the drive mechanism control circuits of all the wheels are on one board, or there may be a short circuit in the power supply of a certain drive circuit.

According to the simulation test and speculation on the ground, due to the lightness and miniaturization, the wires are very thin. It may be that when it drove over a large rock during its walking, the skin of a wire was cut by the stone, and the wire shorted out to the support body of the lunar rover. is the greatest possibility.

There are many unknowns in space exploration that need to be continuously explored by human beings, and there are many problems that need to be re-understood.

Because of this incident, the design of Yutu-[-] was more perfect, so it has been running until today.

Of course, no one would have thought that there would be a person like Zhou Shu in the world, who could directly land on the moon physically.

Zhou Shu jumped to the side of the Yutu, grabbed a solid structural point and lifted it up.

The mass of the Yutu lunar rover is 140 kilograms, and the weight weighed on the earth is similar, but the gravity on the moon is only one-sixth of that on the earth, so Zhou Shu lifts it up and feels the weight is only more than 20 kilograms .

Of course, for Zhou Shu, there is no difference between 140 kilograms and more than 20 kilograms. After all, he is a person who can directly land on the moon physically.

He lifted the lunar rover to have a look, and found that a wire was hung up underneath.

"This is really...one thread scraps a car, and it is still one of the few lunar rovers."

But seeing this disconnected line, Zhou Shu suddenly thought, if this line can be connected, can the Yutu recover?
Just when Zhou Shu had a whim, there was chaos on the earth, or the high-level chaos. After all, the satellites and space stations affected by Zhou Shu must not be known to ordinary people.

Even if there is an impact, it will only be affected for a few seconds, and it will return to normal soon, and most people will not notice it.

But the National Space Administration is different. They can see accurate satellite data, and can easily see what kind of orbit these satellites can arrange.

If satellites can only look at data, the space station has real "witnesses".

Based on the analysis of various information, there should be a mysterious thing passing through that area, and then affecting them.

It's just that it's not yet known whether this "influence" is active or passive.

As for the Tiangong space station, all the inspection tasks have been completed, and the three astronauts checked and found no hidden dangers.

After all, it is the latest space station, with a high level of protection in all aspects and the latest technology, so it is relatively resistant to various situations.

The International Space Station is unlucky. Some cabins have been in service for more than 20 years. For spacecraft, they are very old guys.

This kind of thing, not to mention any external interference, is prone to failure when it is running by itself.

This unexpected "attack" almost scrapped the International Space Station.

Although they were rescued, they were still very mentally disturbed. Some astronauts were already in a bad state of mind.

For example, there is a federal astronaut who drilled a hole in Maozi's return capsule, causing the space station to leak air. The purpose is to destroy the space station and return to the ground early.

Now Maozi and the Federation are arguing, and the astronauts have not said when they can return to the ground, anyway, they just stay there honestly.

On the Tiangong space station, the three astronauts who did not detect any hardware problems began to contact the ground. After they reported the situation, the ground also told them about the findings on the ground.

The ground certainly cannot view the hardware equipment of the space station, but they can view all surveillance videos, whether they are outside or inside the cabin.

Moreover, there are sufficient computing resources on the ground, and intelligent screening can be used to quickly screen those videos, and then find out possible abnormal images.

Originally, it was just "three poles with dates and no dates", but I didn't expect to find an abnormal picture.

Tianhe's "panoramic camera c" captured a blurry shadow with flashes, or like snowflakes on an old-fashioned display screen.

It's just that the blurry shadow only appeared in the image for two frames. After two frames, the camera was disturbed and a large number of mosaics appeared. Even the shadow could not be seen. This shows how fast the thing was.

"What is this? Strongly magnetic asteroid fragments?"

"No, probably an unrecorded piece of spacecraft debris."

"It doesn't look like it, it may be a secret space weapon across the sea."

"What you said is even more outrageous. According to the information we have, the problem with the International Space Station is even bigger. It turned around several times today. If it hadn't finally stopped, we would have witnessed history."

"Hey guys, I've been analyzing the data, am I missing something?"

Listening to the discussion on the ground, Tang Hong suddenly thought of something. If he found that the abnormality was the panoramic camera c outside, then it seemed that he might have captured something.

When he checked in the cabin before, when he found his berth, he found that the camera had been shooting, but it was not fixed, so it kept floating slowly in the berth.

Tang Hong turned it off after seeing it, and now thinking that he might have captured something extraordinary, he hurried to check it.

It doesn't matter if you have to check it, it really made him discover something amazing.

"Control Center, I found something here, I hope you can also take a look."

Tang Hong uploaded the data in the camera to the space station for the ground staff to check.

The picture captured by the camera is much clearer than that captured by the camera outside the cabin, and I don’t know if it’s a coincidence, but the twisting angle of the camera floating and floating is just in the direction of the object’s movement, so a full 19 frames of pictures were captured.

It was clear, and the number of sheets was so large that they finally saw a rough...fuzzy image.

"This looks like a... person?"

"No way?"

Before they finished their discussion, another call came in.

"Well, yes, there's new news again, wait, what did you say? Oh, I see."

The person who answered the phone hung up the phone in shock. Seeing that other people were looking at him curiously, he said, "It's the message from Chang'e-[-], saying that a human-shaped object was scanned, and I'm not sure what it is yet." , perhaps a strangely shaped stone, perhaps..."

It is not new that strange stones are regarded as aliens or something. The most famous one is the "Martian face". Of course, there are similar Internet news on the moon, but the "Martian face" is not as famous.

It's just that they are not aliens, it's just that the stone is shadowed by the sun, and then a coincidental photo was taken at a coincident location, which was hyped up by the Internet.

As for why Chang'e-[-] can still send information back, it is naturally considered the "basic practice" of aerospace.

Daqin's lunar exploration project has made Daqin's footprints on the near and far sides of the moon. In the Chang'e 3 lunar exploration mission, a lunar lander and a lunar rover reached the surface of the moon, making Daqin the third in the world to be on the moon. The country that landed softly on the moon.

It has been almost ten years so far. The Yutu lunar rover in the Chang'e 3 mission has stopped working, but the lander continues to operate. Scientific observatories and astronomy enthusiasts can receive the data sent by the Chang'e 3 lander to the earth. Signal.

For a long time, the lander has been attacked by cosmic radiation and lunar dust. At present, many scientific payloads have stopped working, but the ultraviolet telescope and many automated instruments are still working normally. The Chang'e 3 lander even sent to the earth normally. A picture of the galaxy Messier101.

The solar cells of Chang'e-3 can still provide energy normally. Chang'e-3 can work normally and communicate with the earth when it has energy. The signal is concentrated near Jiamusi in Daqin. Astronomy enthusiasts and Daqin ground stations can Received the communication signal of Chang'e 3.

It is normal for a spacecraft to work longer than the design time limit. Space launch missions are all "careful". After finally launching a spacecraft, it is natural to hope that it will continue to operate for a long time.

So after completing the set tasks, every second of "live" is a pure profit.

Zhou Shu didn't expect it either, because he focused on the Yutu from the beginning, so he ignored the lander.

The main reason is that some instruments on the lander are broken, and the power of the machine is relatively low.

Of course, it was also before. When he repaired the Yutu and determined that it really couldn't be repaired, he started to have a new idea.

It's all here, don't you want to move a few moon rocks back?

Although Daqin had already carried out the task of bringing back lunar soil before, he "only" brought back less than two kilograms, and it was all "powder", not even a big rock.

So he planned to get a few stones back.

It's just that moving back like that will definitely be "polluted" by the air of the earth, so he must at least get a vacuum device.

There are no ready-made ones, but he can make them, and there are many methods. The simplest is to dismantle ready-made materials to make them.

The Yutu will definitely not work. He wants to bring the little rabbit back intact. In this case, the most suitable nearby is the big lander.

He doesn't even have to dismantle them all, just one or two fuel tanks.

It's all landed anyway, and the fuel tank is the most useless thing.

It was only when he came to the Chang'e-[-] lander that he discovered something was wrong. This thing actually scanned it and sent the information back to Earth.

(End of this chapter)