Defend Namsan Park

Chapter 16 The Times Are Calling

151 leveled a large piece of land. The original site was the Chongqing Haichang Caribbean Seawater World Amusement Park in Nanshan. After the evacuation, this attraction has been abandoned, so the base leveled all the land and covered it with thick black pressure ballast. As a test site for the power system of giant machinery, it is a huge isosceles triangle with a side length of one kilometer when viewed from a high altitude.

Honglian needs to test the joints of all limbs here. The most direct way is to let it do the second set of national broadcast gymnastics for middle school students.

(The effect of Dancing Youth is not as good as the times are calling.)
"Really, she is very flexible." Shen Jiang nodded earnestly, "In addition, no matter how she moves, our cockpit can always remain stable."

The biped walking machine system is the most difficult part of the power core. Its inherent instability makes its dynamic characteristics extremely complicated. This piece of pokeweed has been touched a little bit, because the automation department participated in some key research tasks , the humanoid engineering team gathered all the experts in the field of control theory and control engineering that can be found in China, first built a ten-meter-high proportional miniature verification machine, and then enlarged it step by step.

"Strong coupling, multi-variable, non-linear." Shanglu said suddenly.

"what are you saying?"

"The bipedal walking machine system under the control of the BCI system was my research topic when I was a graduate student." Phytophthora turned to look at her, "The reason why this giant robot can walk stably is because its zero-moment point is always kept at It's within the soles of its feet."

The girl blinked.

Shanglu smiled: "I'm reciting my thesis."

"What is the zero moment point?"

"The zero moment point is the ZMP point. It is the intersection point of the extension line of the resultant force vector of the gravity, other inertial forces and ground reaction forces on the biped robot and the ground. It is under the feet, and the walking machine can walk smoothly. This is the point where all biped robots The theoretical basis of the walking machine." Shanglu explained, "Of course Honglian is much more complicated than what I said, it is a supercomputer-controlled robot, it can do real-time online gait planning, and even do radio gymnastics by itself .”

Shanglu knew more about engineering, and he finally had something to show off.

"She's very smart." Shen Jiang stretched her waist in the zero-gravity buffer, her body was driven to spin by a small angular momentum, "It's a pity that she can't think on her own."

Phytolaca grabs a handle to fix its body, because Honglian is doing a turning exercise to test its limbs. It can rotate its slender and elegant waist 360 degrees, which is impossible for humans. In one section, the red lotus also has an incomparable advantage over humans, because it is a six-limb movement.

Talking about the advantages of four arms, Shen Jiang said that she can also build coordinates.

Shanglu asked what is Jian coordinates?
So Shen Jiang demonstrated how to establish a huge spatial rectangular coordinate system. Honglian raised one hand upright, which is the Z axis, and the other two hands were opened horizontally and folded at right angles, like a traffic policeman directing traffic, which is the X axis. Axis and Y axis, this is the benefit of having four arms - the last arm can be used as the time axis icT, or it can be extended obliquely as the world line, and it can even perform Galileo or Lorentz transformation!

How to change?Shang Lu asked.

Guren maintained this posture and took a big step forward.

The Galilean transformation is complete.Shen Jiang said.

Phytrol observed the outside scene through the bulkhead. He didn't know where the lenses of this panoramic VR display device were installed, but it did create a transparent effect. The driver stayed in the cabin, as if staying in a giant transparent world. Inside the head, you can see the shoulders and arms on both sides, as well as the chest, abdomen, waist and legs. When Honglian bent over, it was like falling from a height of 50 meters, and the ground rushed head-on. It was more thrilling than a roller coaster. While thinking that designing a human figure is the most complex in engineering, it can also bring the highest degree of freedom and higher-order activity space.

Human beings always want to create something similar to their own image, no matter how big or small, the small ones can be said to be replicating themselves, and the big ones can be said to be creating gods.

This damn creator complex.

"I've been thinking, how do you guys fight against angels?" Shang Lu asked a question he had always wanted to ask.

"Huh?" The girl turned her head, "Fighting angels?"

"It doesn't sound like an angel is a monster that can stretch out its fists and feet to fight you. How do you fight it?" Shanglu asked, "Four arms punched the master to death?"

"You have to have some concept of four-dimensional space, supervisor." Shen Jiang said.

"I'm just a supervisor, what concept can I have about the four-dimensional space?" Shang Lu broke the can.

"The four-dimensional space we are talking about now is not the Minkowski space-time with the three axes of the Euclidean rectangular coordinate system plus the time axis. It has four spatial coordinate systems, so things in our world must follow them when entering the four-dimensional space. The rules over there." Shen Jiang said, "We all know that the law of spherical attenuation can be deduced from the conservation of energy, whether it is force or field, it must follow the law of spherical attenuation, but the length of a three-dimensional sphere is different from that of a four-dimensional sphere. Under normal circumstances, the surface area of ​​a four-dimensional hypersphere is much larger, which means that the spherical surface in the four-dimensional space decays faster than that of our universe."

Shanglu seems to understand but not understand.

"You mean that in the four-dimensional space, the attenuation of energy during propagation will be greater?"

"Well... It can be said that not only energy, but also force is the same. All long-range forces - including gravity and electromagnetic force, have greater attenuation in four-dimensional space." Shen Jiang nodded, "You have learned from Newton The second law, Newton states that in our universe force is inversely proportional to the square of the distance, right? That denominator in the gravitational formula is r^2."

Shanglu nodded.

"But in the four-dimensional space, this law does not hold. They have an inverse cubic law, which means that the force is inversely proportional to the cube of the distance, which is r^3." Shen Jiang said, "The action distance of all long-range forces enters the four-dimensional space. will change, including electromagnetism, which is the main fundamental force that makes up our physical world, and you—"

Shen Jiang poked Shanglu's chest.

"I--"

She pointed to herself again.

"As well as everything around us, the force that maintains the stability of their basic structures will collapse the moment they enter the four-dimensional space, which is why human beings' conventional weapons are completely ineffective against angels, and everything will be shattered into elementary particles the moment it touches it .”

"Then how did we eliminate it?" Shang Lu's eyes widened.

"Secret weapon." Shen Jiang hummed.

"My aunt, my sister, my ancestors, what is the secret weapon? Just tell me—" Shanglu decisively gave up her dignity.

"Who is your aunt?" Shen Jiang was very disgusted, she turned her head away, and turned back after a while, "To tell you the truth, I don't know what it is, it is really top secret, and it is transported from the rear every time." Come here, it is tightly packaged, and it will only be hoisted into Red Lotus's weapon system storage warehouse before the action."

The girl didn't look like she was joking.

"Mr. Ji should know. If you have the ability, you can ask him and see if he will tell you."

As soon as Shanglu thought about the old man Ji's face, he knew that there must be nothing going on.

"I don't know, don't ask me."

Old man Ji's voice sounded from the earphones.

It really didn't work.

·
·
·
"Ah—headache, so annoying." Shen Jiang suddenly knocked on the helmet visor, frowning, "It's started again."

"What's wrong?" Shang Lu slowly floated over to support her, "Ms. Ji, Shen Jiang said she has a headache."

"Have you taken your medicine?" Old Man Ji asked.

"Eat." Shen Jiang said.

"There's nothing wrong with eating it." Old man Ji said hesitantly, "77% of the test of the power system of the giant machine body has been completed. You can take a rest."

"IM so tired."

The girl pushed Shang Lu away, then curled up, closed her eyelids, and fell asleep.

Shanglu was speechless, and the speed at which he fell asleep was amazing.

"Ms. Ji, she...she fell asleep."

"Oh, I know."

Shen Jiang curled up in a small ball in the light blue zero-gravity buffer, and the breathing and data transmission lines were suspended there like a baby's umbilical cord. Phytophthora didn't dare to touch her, and felt incredible. Going back for three days, he I definitely never imagined that I would be staying in a 50-meter-high light blue transparent liquid ball at this moment, and there was a peacefully sleeping girl floating in front of me.

(End of this chapter)