The Eighth Route Army's extended-range anti-aircraft missile was produced nine days after it was proposed.
The main time is spent on program control... After adding the booster, all the problems of front and rear balance are solved by program control of the wings, so the difficulty is concentrated on the program.
This is originally difficult to achieve or impossible to achieve accurately in a short period of time, because the booster will not only reduce its weight, but also generate thrust when it is ignited. When the booster fuel is exhausted, it will not only
The booster itself is abandoned, and there is also the problem of the main combustion chamber re-igniting to produce instantaneous thrust when the thrust of the booster is lost.
All of this can be calculated. At first, Chen Jiefeng, He Zhimin and others thought it was not difficult. After all, He Zhimin was an aircraft expert and it was not a big problem.
However, upon closer inspection, we found that there are many problems.
This happened on the third day of research and development. At that time, Wang Xuexin was looking at the information he had received about Fengtian City.
Fengtian City is indeed a fortified city. It has a total of eight gates and the city walls are more than 3 meters high. Although it cannot be said to be indestructible, it will still be a big trouble for the equipment of this era.
In particular, after the Japanese took control of Fengtian City, they repaired the city wall several times in order to better control the people... The Japanese repaired the city wall not for defense. At that time, the Japanese had basically no need for defense. They just wanted to separate the inside of the city from the outside of the city so that the Eighth Route Army could
It's not that easy to sneak into the city.
However, even the repair section is not that easy to break, because the Japanese have built modern defense fortifications there: trenches, barbed wire, anti-tank trenches, bunkers, gun towers, and there are also mines outside the fortifications, even if they are cleared of mines
It takes a lot of effort.
Just when Wang Xuexin was looking at the map, Su Xin and He Zhimin hurried to Wang Xuexin's office.
He Zhimin looked frustrated and said in a panic: "Captain, the anti-aircraft missile...has a problem, and it may not be fixed so soon!"
"Why?" Wang Xuexin asked.
He Zhimin sighed and said: "We did not consider one thing: the thrust of the booster is different from the thrust of the missile. The moment the booster breaks away from the missile, the thrust of the missile changes greatly. If the wing fails to
If you adjust your angle in time to adapt to this change, you may deviate from the track or even lose control!"
"Can't you calculate this amount of change?" Wang Xuexin asked doubtfully. As long as you can calculate this amount of change and then adjust the wings to the correct position at the moment of ignition, wouldn't it be enough?
Then Wang Xuexin realized that he had oversimplified the problem.
He Zhimin said with a pale face: "Captain, it is possible! But the missile changes when it is flying in the air. We have no way of knowing what state the missile was in at that time, so..."
Wang Xuexin immediately understood what the problem was.
When the missile is on the launcher, its angle and attitude are fixed, so it can easily know the direction of gravity, direction of resistance, etc. In this case, the calculation is relatively simple.
But it is different when the missile is ignited in the air. At that time, the missile flew in the direction of the target under the guidance and control of ground radar. It may be vertical, horizontal or any angle. In other words, there are countless ways
possible.
With so many possibilities, there would be countless calculation results, and the corresponding wing angles would also be different, so He Zhimin didn't know how to develop further.
Wang Xuexin didn't think there was anything to make a fuss about. He just asked in confusion: "Can't Xiao Chen solve it?"
Xiao Chen refers to Chen Jiefeng, who is in charge of the computer department.
Su Xin and He Zhimin looked at each other, and then asked: "Captain, there is nothing Xiao Chen can do about this!"
"Yes!" He Zhimin said: "Xiao Chen can indeed calculate faster using a computer, but there are so many possibilities..."
Wang Xuexin glanced at He Zhimin in confusion: "Why do we have to calculate so many possibilities?"
He Zhimin was stunned for a while: "If we don't calculate all these possibilities, how can we..."
"Can't we use computer control?" Wang Xuexin interrupted He Zhimin: "The computer reads the attitude of the missile in the missile, and then calculates the results on the spot and controls the missile wings to make corresponding changes! Xiao Chen did not mention this solution
Method?"
Su Xin and He Zhimin were both stunned.
This is not a problem that Xiao Chen did not expect, but a problem that everyone in the institute did not expect.
But think about it, you can really do this. Since the computer can read the data in time and solve it on the spot, why not use the computer to process it?
He Zhimin swallowed, nodded with difficulty and said: "We know how to solve it!"
Wang Xuexin just said "hmm" and turned his attention back to the map.
Before Su Xin left, she looked back at Wang Xuexin with complicated emotions and thought to herself: This guy, the problem that the entire institute was stuck in was solved so easily by him, and he acted as if it had happened as a matter of course.
Look! What kind of person is he?
What Su Xin didn't know was that this was exactly what happened to Wang Xuexin.
Modern missiles have built-in computers that calculate the target's position in real time and control the missile to fly in the target direction.
The reason why Su Xin and other research institute personnel did not think of this is because they have not yet adapted to the combination of computers and equipment... Prior to this, anti-aircraft missiles had been controlled by the ground air defense system, and the internal automatic control was only maintained by the gyroscope.
Stable flight at this level.
Just now, Wang Xuexin stuffed a small computer into the missile in order to solve the problem of mid-air ignition.
One day, when the radar is miniaturized and the computer is developed to a certain extent that it can be inserted into a missile, it will not only solve the problem of aerial ignition, but also be able to actively find targets without the need for ground air defense system control.
This day may still be far away, but it can be said that the first step has been taken.
It is said that when He Zhimin returned to the research institute and told others about Wang Xuexin's ideas, the researchers were surprised, excited and ashamed.
What is surprising is that this method can be used to solve this problem that is considered almost unsolvable, and it is also easy to implement.
What's exciting is that anti-aircraft missiles seem to have taken a big step forward.
Ashamed, it goes without saying that with so many people sitting in the research institute discussing, it is not as good as Wang Xuexin’s casual words.
Among them was Chen Jiefeng, who sighed and said: "Where have I learned about computers? I only know how to use them to do calculations, but I don't know how to install them on missiles!"
Su Liguo laughed and said: "Don't be discouraged, Xiao Chen! We are almost the same. Let's not even think about competing with the group leader!"