In space, can the rotation of a large space station really create artificial gravity?

Gravitational energy can be generated, but the requirements are more demanding. Let's talk about the generation of gravity first, and then talk about whether it can be used in this way.

1: Gravity is divided into natural gravity and artificial gravity; Natural gravity is some large-mass celestial bodies, such as the earth, which uses the advantages of its own large mass to generate gravity through the attraction of objects, of course, this part of gravity is not completely converted into gravity, and part of it is converted into the rotation of the earth.

centripetal force; That is, the gravitational pull of a star on an object can be decomposed into centripetal force and gravity force in a circular motion. by Newton's law of gravitation.

and the formula for circular motion can be derived. Because the mass of the earth itself is relatively large, the gravity generated is relatively stable, and people do not feel uncomfortable.

2: Then there is artificial gravity, in order to generate gravity in space, the building must have the support force for the human body; The relationship between the centripetal force and the velocity of the circular motion is obtained; fn=m·v^2/r。According to this principle, it is possible to make the space station.

Rotate around a center; Before the rotation, there is no force between the human body and the inner walls of the space station, because they are all in a state of weightlessness. When the space station rotates, if you want people not to leave the space station, the inner wall must have a support force for the human body, and this support force can act as a centripetal force for circular motion. At this point, the person will gain a certain amount of gravity, and the magnitude of this gravity depends on how fast the space station rotates.

Although there is a theoretical guide, no country dares to adopt this model at present; The main issues involved are propulsion power, manufacturing materials, type of structure, energy consumption, etc., and the most important of them is safety, because such a device is not as stable in gravity as on Earth, and if the mass of the space station is not enough, it will not be able to form a stable gravity. Therefore, this kind of device is mostly found in science fiction works; For example, "Interstellar".

Elysium", etc. The one in Interstellar is a small one, while the one in Elysium can cultivate an ecosystem.

For human habitation.

In space, can the rotation of a large space station really create artificial gravity?

Yes. Because the rotation of a large space station can produce a certain centrifugal force, which can replace gravity, it can produce artificial gravity.

It is not possible with the current technology, but it is possible in the future, but we cannot estimate how long it will take.

In space, it is feasible to create "artificial gravity" by rotating a spacecraft or space station. As the space station rotates, centrifugal force pulls the person outward, a process that can be used to simulate gravity. But it won't be exactly the same.

Because of the greater Coriolis force (a description of the offset of a particle in a rotating system that undergoes linear motion due to inertia, relative to the linear motion produced by the rotating system. The Coriolis force is derived from the inertia of the motion of an object. ) will also appear, so the trajectory will fall into a curve instead of a straight line.

A possible way to create artificial gravity on a space station is to use a rotating system (such as a rotating cylinder, ring, or sphere). Technically, rotation can produce the same effect as gravity, as the centrifugal force it produces is somewhat similar to gravity. By adjusting certain parameters of the space station, such as radius and rotation rate, it is possible to create a force equivalent to gravity on the outer wall.

Tsiolkovsky was raised more than 100 years ago.

In fact, the method of creating artificial gravity has long existed, as early as more than 100 years ago, Tsiolkovsky, known as the father of astronautics, proposed that we can use the "centrifugal force" generated by the rotation of objects to simulate gravity. It should be noted that "centrifugal force" is a virtual force introduced to facilitate the description of non-inertial frame of reference, and its essence is the embodiment of the inertia of an object.

Space station. The reason why it rotates is to create gravity.

For example, plants in the space station lack gravity.

As a result, there is a lack of directionality in growth, so scientists use rotation to simulate gravity, so that the growth of plants is directional.

One of the features of the space station is its economy. For example, all space stations do not have the function of returning to the surface, but instead host astronauts in space.

Conducting experiments can make the manned spacecraft a tool for transporting only astronauts, thereby simplifying the structure of the space station, reducing the difficulty of its engineering design and reducing the cost of spaceflight. In addition, the space station can be manned or unmanned during operation, as long as the astronauts start and debug it, it can continue to work as usual, check regularly, and achieve results at that time.

The latest news of China's space station has attracted the attention of many friends, and it has also made everyone more and more curious about China's space, in this process we can find that the type of power used by different space stations is also different, and many people have found that China's space station does not use artificial gravity, so there are many people who are particularly curious about this and want to know what the reason is.

We all know that the earth we live on is full of gravity, and if human beings want to maintain normal activities and survival, then they are also particularly dependent on gravity, but after going to outer space, there is no impact of gravity, in this case, it will not only affect our survival, but also have a very large impact on our activities in outer space, so in this case, we must use artificial technology to generate gravity, in this case, we can ensure that we can carry out normal activities.

Through the above understanding, you can find that gravity is very important in the process of our activities, and because of this, the space station also needs to have enough gravity, and the most common gravity ** way is artificial gravity, but why does the space station not use artificial gravity?

We all know that artificial gravity is generated, mainly through the gravity generated by rapid rotation, but the fast-rotating space station is not suitable for us human survival, working in this space station can easily cause us to experience dizziness and nausea, and even direct coma, in this case it will not only lead to safety problems, but also affect activities, so artificial gravity, If you want to do this in this case, it becomes very difficult.

Because of this, in terms of gravity on the space station, we must use other more scientific methods, only in this way can we get better results, if we rashly use artificial gravity, then it is difficult for us to be satisfied, and it will also have a certain impact on the operation of the space station.

Because artificial gravity is not particularly mature at present, there are still certain problems, so in order to avoid some safety problems, this artificial gravity has not been used.

This is because China has not yet reached such high technology, and there is no such technology in the field of aerospace, so continuous efforts are needed.

Nowadays, man-made gravity is not very stable, and the cost of engineering is relatively large, the effect is not very good, and the cost is relatively high.

The main reason is that China thinks that it is difficult to develop in this direction, so it has changed to a different situation, which can save some of its strength.

No, becauseSpace station. It is the small and medium-sized fruit that scientists needSuch an experimental platform in orbit, precisely because of weightlessness, can carry out a lot of experimental observations that cannot be carried out in the influence of earth gravity in the space station, in the space station load experts to carry out biophysiology, physics, chemistry and other disciplines of experiments, some small experiments such as the combustion characteristics of matter in space, the free diffusion movement of material particles, etc., although very simple, but conducive to the development of materials and other disciplines of science and technology.

There are two reasons for the weight of the wearers: the gravitational acceleration decreases with altitude, and the gravitational acceleration at an altitude of several hundred kilometers is much smaller than that on the ground, but this is not the main factor.

The space station flies by inertial wisdom on an approximately circular elliptical orbit, and the altitude of the perigee and apogee are all about 400 kilometers, and the gravitational potential energy between the near and apogee sites.

and the change in kinetic energy maintains the speed of flight, and the velocity at perigee is the first cosmic velocity.

In such a circular motion, the gravitational pull of the earth happens to provide the centripetal force of the circular motion.

So the objects on the space station are basically unaffected by gravity (there is still gravity, but the gravitational force is canceled out).

Until now, all the ideas of creating artificial gravity in space have remained on paper, or science fiction.

Middle! But in fact, artificial gravity can be realized, and it may require certain structures and technologies, such as the following:

In space, it is feasible to create "artificial gravity" by rotating a spacecraft or space station. Centrifugal force when the space station rotates.

will pull the person outward, and this process can be used to simulate gravity. But it won't be exactly the same because of the greater Coriolis force.

A description of the offset of a particle in a rotating system that is moving in a linear motion relative to the linear motion produced by the rotating system due to inertia. The Coriolis force is derived from the inertia of the motion of an object. ) will also appear, so the trajectory will fall into a curve instead of a straight line.

The rotating cabin, which is the astronaut living module generated by artificial gravity, is not really gravity, but centrifugal force simulated gravity, which is the opposite of gravity centripetal, centrifugal force is the center of rotation radioactivity.

Outwardly! <>

The Martian. The same is true for the Helms, but its diameter is significantly smaller than that of the Star, so if you want to generate enough centrifugal force to simulate gravity, its relatively high rotational speed should be very uncomfortable! Because the speed of the human body under simulated gravity is 1-2 revolutions per minute, if it exceeds 3 revolutions, it will be dizzy.

The higher it is, the more dangerous it is!

Eternity also simulates gravity through centrifugal force, and contrary to Helms, it seems that the entire structure of Eternity is annular shaped, but please note that the cockpit in the middle is fixed, so it has a rotating structure to prevent the cockpit from turning!

In addition to centrifugal force, other ways of direct and violent acceleration are too far away from us, because with our current technology, we can only get out of the atmosphere.

Enjoy! Because the specific impulse of our engine is not enough, this acceleration is unsustainable, so hope is dashed!

Another example is like Star Trek.

The gravity formula of advanced technology is even more distant, and I don't even know how to implement it, let alone start simulating it!

Of course, we don't have to think too much, because we can't even realize the most basic centrifugal force simulation gravity (mainly because the structure is too large, and it is really difficult to bear with the current technical cost)! So on the ISS.

Don't think about it, it's almost retired, what's the toss?

It is impossible to exist, because space is a very large environment, and if there is artificial gravity in one place, then it may cause other environments to converge on this place, causing stars to collide.

If gravity is created by gravity on the International Space Station, then astronauts can move as if they were on Earth. But if gravity does exist in the space station, it is estimated that there will need to be a propulsion engine to make the spacecraft travel from Earth to space, and the engine will need to be kept on to fly in space.

There can be no artificial gravity, gravity, linearity, rotation is the only thing. Without gravity, there is no way to keep us from gravity, and the only way to make gravity is to have a negative gravitational mass.

It is possible that with the development of science and technology, a method that can both protect people and generate artificial gravity can be developed.

Scientists very much want to build the space station into a ring that can simulate gravity with centrifugal action, such as the huge space station in "Elysium", of course, that is too big, or the Helms spacecraft in "The Martian" or the Eternity in "Interstellar", which are very good, human beings work and live under simulated gravity, and the recovery time to the ground can be greatly shortened, since there are so many advantages, then why don't we make a circular space station?

A space station with an open atmosphere in Elysium.

The Helms's circular living compartment.

The aircraft in "Interstellar" is more interesting, the whole is a ring, the functional compartments are arranged in a circle, and the middle is the cockpit, isolated by a rotating module!

Undoubtedly, the centrifugal action on the way to simulate gravity is very comfortable, of course, this has some requirements, because the human vestibular organ is extremely sensitive to rotation, and the rotation speed must be controlled within the revolution, if the acceleration is to be achieved, then how large is the diameter of the annular cabin?

The formula for calculating centripetal plus celestial velocity, A is the centripetal acceleration, W is the angular velocity, and R is the radius!

That is, the w requirement is 2 revolutions, about radian seconds.

Then r = that is, if the gravitational acceleration to be achieved is about 2 revolutions per minute, then the radius of this annular structure should reach about 112m!

The size of the ISS is long and wide, but the actual length of the real main truss of the ISS does not exceed 90m, and the entire size of the ISS can not even meet the above radius! The International Space Station has taken 16 countries and regions more than 20 years to slowly accumulate, so you can imagine how difficult it is to have a 111m radius annular space station! More precisely, the following points:

First, the cost, the cost of this huge structure is undoubtedly extremely high!

Second, the transport capacity, with current rocket technology, it is almost impossible to assemble such a huge space station!

3. At this stage, artificial gravity is required for the space station

For the sake of the above, it is completely understandable that the space station is not designed with artificial gravity, we must have it, and only then can we think about comfort! Therefore, even for a long time to come, it is unlikely that this design will be adopted, unless our rocket technology has improved by leaps and bounds, otherwise look at the classic structure of the ISS!