From University Lecturer to Chief Academician

The experimental base in the third area of ​​the aerospace industry is located in a barren hill far away from the hustle and bustle of the city. The car drove for more than two hours before arriving in front of the experimental base.

A receptionist opened the door.

Wang Hao stepped out of the car, and saw a group of people walking towards him.

Walking in the front was an old man in his sixties wearing a shirt and army trousers. His hair was a little gray but he looked energetic.

After the old man came over, he held Wang Hao's hand tightly with both hands, and said enthusiastically, "Academician Wang, I have waited for you."

The person next to him introduced, "This is academician Zhao Xingli, the person in charge of the third district."

Wang Hao nodded and smiled, "Academician Zhao, you are too polite."

Afterwards, the staff next to him helped to introduce other people. Standing next to Zhao Xingli was Zheng Guofeng, the chief researcher of the 137 Institute.

Zheng Guofeng treated Wang Hao even more warmly than Zhao Xingli. He took Wang Hao's hand and said excitedly, "You have greatly improved our missile interception technology!"

Wang Hao knew that his mathematical research was related to missile evasion and interception, but he still didn't know the specifics, so he asked, "What did you research?"

"Track-changing injector!" Zheng Guofeng said, "To be precise, it's called missile anti-intercept orbit-changing injector."

"We realized the anti-interception orbit change based on the mathematical scheme you provided." Zheng Guofeng said with some pride, "We have created a orbit change injector that weighs only about ten kilograms and can be installed behind the warhead. When it is 50 kilometers away from the target, which is the final path of the missile, it can play an anti-intercept role."

As Zheng Guofeng said, he dragged him into the experimental base together.

They walked and talked.

Zhao Xingli, Zheng Guofeng, and Wang Hao walked in the front together, and the others followed behind, and kept looking at Wang Hao, "Academician Wang Hao, you are really young, this time you can see a real person."

"I've been seeing it on the news, and I feel that he himself is younger than the news, so young, already..."

"That's incomparable!"

"The mathematical research done by Academician Wang Hao is so valuable, it can directly design a new device!"

"Those are just a small achievement of his. I didn't see the news that his latest research is the speed of light. I don't even dare to think about explaining the problem of the reduction of the speed of light."

"I haven't seen any anti-gravity research. Their research is much more advanced than ours..."

Zhao Xingli and Zheng Guofeng explained to Wang Haohao their results and the upcoming experiment together.

They have created an anti-intercept orbital injector that can be retrofitted on missiles.

This orbit-changing injector is installed behind the warhead of the missile, which is the middle part of the missile. It shares radar data with the missile and has an independent electronic system. It also has three explosive jet ports for temporary jet change. warhead direction.

Because it is installed behind the warhead, it works after the rear body is detached, which is about 50 kilometers from the ground.

"At this altitude, ordinary anti-missile systems cannot intercept it."

"For example, internationally renowned patriots will not hit at an altitude of more than 50 kilometers. Normally, it should be around 30 kilometers."

"The orbit-changing jet can share missile radar data. When it detects that an anti-warhead is approaching, a jet port will explode to change the direction."

"The next ten kilometers are for path correction, but there will be deviations..."

Zheng Guofeng shook his head helplessly as he said, "No matter how we modify the calculation method, there will always be deviations in the path. If we intercept at an altitude of 30 kilometers, it will not affect the hit target, but the deviation still exists and will affect the missile. precision."

"If it is at an altitude of ten kilometers, there may be problems, because the power of a single jet after the missile rotates is sometimes weaker and sometimes stronger, and the path correction is not so accurate."

Wang Hao nodded in understanding and said, "It is normal to have deviations, because some of them are approximate calculations, and it is impossible to fully guarantee the accuracy."

Zheng Guofeng's brows loosened a little, and he immediately felt affirmed.

Because the experiment was carried out at 1:00 noon, Wang Hao first walked around the experimental base to visit various facilities and manufactured equipment.

Zhao Xingli found out that Wang Hao was very interested in military facilities, and took him 30 kilometers away to see the anti-aircraft missiles that were on standby.

He also said, "We are going to experiment with conventional medium-range missiles, and the attack direction is the target area in the distance."

"The accuracy of the missile is already very high, and the normal deviation does not exceed 20 meters."

"But please rest assured that the missile carries an empty shell warhead, which is filled with sand and will not explode. Even if there is an accident in the experiment, it will not threaten safety."

Wang Hao nodded as he listened. He was really worried that there would be a deviation, and a missile exploded beside him.

That would be too miserable.

It was already noon when we returned to the experimental base. Wang Hao finished his lunch quickly, and it was almost time for the experiment.

He was placed on a hill, in a cave next to it, and there were some equipment and a lot of screens, obviously dedicated to observing missile experiments.

Wang Hao stood on the top of the mountain.

Zheng Guofeng stood beside him and said, "It's about 20 kilometers away from the shooting range. Today's weather is very good. If the experiment is successful and the missile is not intercepted, we can see it when it falls."

"Then I'm really looking forward to it." Wang Hao said with a smile, "I've never seen a real missile strike."

"You can see clearly this time."

After Zheng Guofeng finished speaking, he went to work. The orbit-changing jet was the result of the 137th Institute. Of course, he would hope for the results of the experiment, especially when he invited Wang Hao to watch it. It would be too embarrassing to fail.

He still has some confidence.

They have already conducted two experiments and achieved some results, but the final accuracy is a little worse.

This time, the control code has been revised again, hoping that the accuracy can be improved.

soon.

It was already one o'clock, and the commander's shout could already be heard inside, "Get ready!"

"3, 2, 1..."

"emission!"

The commander issued an order to officially launch the experimental missile.

Medium-range missiles have many advantages, including rapid launch, rapid strike, and difficulty in interception. It usually takes only ten minutes from launch to concentration of targets.

The missile that was tested this time had a flight time of only thirteen minutes.

Wang Hao has been waiting in place, looking at the sky from time to time, a blue sky and white clouds, coupled with the endless mountain scenery, it gives people a refreshing feeling.

In the constant anticipation, a sudden sound was heard.

Sparks were visible to the naked eye in the distance, and the anti-aircraft missile was officially launched. White smoke fell from the tail of the missile, and it flew into the air.

Zhao Xingli next to him also explained, "An automatic warning of anti-aircraft missiles, the interception altitude is 25 kilometers, we can't see it."

Wang Hao felt a little regretful after hearing this.

soon.

A noisy sound came to my ears, a small black dot passed through the clouds and quickly fell towards the left, but just looking at the direction of the fall, it was obviously not a shooting range.

The little black spot was still slowly correcting its direction. As a result, it passed high above its head, and after a long time, it heard a faint collision sound from behind.

Wang Hao was completely stunned, and then felt a burst of fear in his heart.

Although the location where the missile hit was far away from itself, it only passed overhead high.

But it's still very dangerous!

Zhao Xingli had reacted a long time ago. He looked at the command base with a darkened face, and when he turned his head, he was very embarrassed about the facts with Wang Hao.

Without a doubt, the experiment failed!

The missile did complete the anti-interception work and was not hit by the anti-aircraft missile, but it was clear that the location where it finally hit was even tens of kilometers away from the target.

This can no longer be called a deviation, it is completely out of the normal track.

A group of people came over from behind.

Zheng Guofeng trotted to the front, and said with embarrassment, "The anti-interception has been achieved, but I don't know what happened, the deviation is too big."

Zhao Xingli twitched the corner of his mouth, and couldn't help saying, "Can that be called a deviation? Old Zheng, this is a failure!"

"Failed, it's still a calculation problem..."

In fact, one failure is not a big deal. The orbit-changing injector is a brand new device after all, and it is an auxiliary device for missile anti-interception. From research and development to technology maturity, it will definitely take a long time and go through many experiments.

But the most important thing is that the deviation is too much, it can be said that the experiment failed, and it still happened in front of Wang Hao.

For this experiment, no matter it is the 137th Institute or the third aerospace industry area, they are very confident in this experiment. Because of this, they invited Wang Hao to watch it, but it turned out to be a huge failure.

This is where it gets awkward.

Wang Hao felt a little scared just now, but at least he is safe now, he still smiled, "Anyway, I saw the missile attack, and it was not a waste of time."

Zheng Guofeng suddenly became more embarrassed.

Experiment failed.

A group of people returned to the base, discussing the experimental issues on the way.

Zheng Guofeng kept saying, "It must be related to calculation."

"We corrected the calculation method last time, but we didn't expect this problem to occur."

"The previous deviation was still a bit large. The highest accuracy was also deviated by more than 50 meters, but this time it is really strange, and it directly deviated by dozens of kilometers."

Zhao Xingli emphasized again, "Old Zheng, that is no longer a deviation."

Zheng Guofeng's face was flushed by the words, and he could only utter two words in the end, "Okay."

After returning to the experimental base, Zheng Guofeng didn't care about the embarrassing problem anymore, he quickly pulled Wang Hao to talk about the calculation problem.

The mathematical work done by Wang Hao pointed out a main direction route for missile correction, but when it comes to the actual application, there are still many things that need to be calculated.

For example, air jet force control.

The power of the jet is supported by high-pressure gas combustion, and the size of the jet port determines the power produced.

In addition, the power generated by the jet port is also related to the path of the missile, and also involves a direction control.

The calculations involved are extremely complex, and they put most of the work into mathematical calculations.

These mathematical calculations have to be converted into codes, so that the electronic equipment carried by the orbit-changing injector can automatically make calculations and controls in combination with radar data.

Zheng Guofeng pulled Wang Hao to talk carefully, and wrote down their overall design and detailed calculation methods.

Wang Hao listened patiently.

He found that the most complicated and most prone to problems, one is the direction control, and the other is the size control of the jet.

But the most uncertain thing is still the calculations related to missiles, which involve the NS equations that require approximate calculations.

"Computers can make approximations to the equations, but sometimes, there may be a problem with too much deviation."

"Our calculation method is not so rigorous, especially in direction correction, it is more prone to problems."

"This question determines the ultimate accuracy."

"We have conducted several experiments before and concluded that it will definitely affect the accuracy of the missile."

"We hope to improve accuracy and reduce impact, but..."

Zheng Guofeng said and shook his head, "There is still a problem with the calculation method, it is too complicated." He felt that the explanation was not clear, so he took out a blank piece of paper and wrote three sets of equations, "It's like this equation. Approximate calculations are automatically performed, and the resulting values ​​sometimes have large deviations."

Wang Hao picked up the white paper and carefully looked at the three sets of equations, and said in a daze, "That's the equation? Isn't it very simple?"

"……ah?"

Zheng Guofeng was stunned.

The other people next to them were also stunned. The automatic calculation of similar equations stumped 137, even 136, and other research institutions under the aerospace industry.

They have been troubled by this problem for several months, or even more than a year. It can be said that since they started researching, they have been troubled by the problem of automatic approximate calculation, and they are still constantly correcting the background calculation code.

As a result, it came to Wang Hao...

very simple?

...

Wang Hao really thinks it is very simple, because it is just some partial differential equations.

After completing the research on the NS equation, he can be said to be the top in this field, and no other scholar can compare.

Although the equation looks complicated, the first time he saw Fang Cheng, he had already thought of several approximate calculation methods, and each of them had a very high degree of approximation.

In addition, he has done two computer projects with NS equation approximate calculation as the core, and he also knows what kind of method can make the calculation of the computer closest to the real solution.

So he thinks it's very simple.

After that, Wang Hao gave a brief explanation, talking about several projects he had done, "Although there are differences in the equations, the calculation methods can still be used for reference."

"I'm not sure what the best way to do the calculations is, but it's not that hard to solve."

Zhao Xingli's eyes lit up, and he said immediately, "Otherwise, academician Wang, we will cooperate in the project, you can help us design a calculation method, and we will provide the funds..."

"That's not necessary."

"Ah?" Zhao Xingli was a little confused.

Zheng Guofeng thought that Wang Hao was unwilling to help, so he immediately said in a pleading tone, "Academician Wang, we have been troubled by this problem for a long time, please help..."

Wang Hao said, "Professor Zheng, you misunderstood me. It's not that I don't want to help, but that I don't need to do any projects."

"This problem is very simple. I can solve it after a little research. There is no need to go back and find a solution."

Zheng Guofeng was stunned again.

Zhao Xingli was also dumbfounded, "Academician Wang, are you joking?"

Wang Hao shook his head and said, "Can I joke about this kind of problem? Otherwise, I will think about it carefully today and talk to you tomorrow morning."

"At that time, let's study together again."

"..."

"..."