Chapter 296 You exchange blood and I exchange brains, Junior Brother takes out a magic weapon

"Great! Junior brother, can you modify the circuit board to be like the DJS-59, with several layers of small boards stacked on top of each other?"

Chief Engineer Zhang put forward his own requirements. In his opinion, this should be relatively easy. It may take some time, but it should not be difficult.

A large board is not as good as several layers of stacked small boards in terms of high-G and vibration reinforcement, structural strength, and component arrangement. Although the size of 0.5 meters square is a piece of cake for target missiles, it is better to be able to make multiple layers of stacked boards.

Unexpectedly, Gao Zhendong shook his head.

"What? Is it an electromagnetic compatibility problem? Or a high-frequency wiring problem?"

Gao Zhendong looked puzzled. "No, I mean no. Originally, I designed this circuit board so that it can be cut into four pieces along the stamp hole, and the boards are connected with flat cables. In order to accommodate the small diameter cylindrical chassis, I even deliberately did not wire the four corners of each small board so that they can be cut off to further adapt to the small diameter."

After that, Gao Zhendong pointed out the stamp holes, blank areas and wiring between boards on the circuit board to them.

"What is a small-diameter cylindrical chassis? Are you planning to install it on missiles from the beginning?" said Chief Engineer Zhang, who was amused by Gao Zhendong's new term.

Gao Zhendong chuckled: "Brother, I came from the battlefield. It is reasonable to pay more attention to weapons and equipment in the design of the results."

Chief Engineer Zhang sighed, "You've been to the battlefield? No wonder, you're thoughtful."

Gao Zhendong then introduced the single-board computer to them: "I temporarily named this machine DJS-60D, where D stands for single-board computer. Everything is integrated on one board."

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"In summary, although it has less storage space and registers, the word length is the same, and the main frequency is higher than that of DJS-59, and the overall computing power is similar to that of DJS-59. Since the instruction set is compatible, there is basically no learning cost for DJS-59 programmers to use it. For programmers who use C, there is even less cost, because the compiler has been adjusted."

Chief Engineer Zhang smiled and said, "That's great. I'll replace the analog computer when I get back to make room for it. This way, we can save a lot of weight."

To some extent, a considerable number of analog computers cannot even be called computers. They are more like comparative executors of fixed programs. The analog computers that came from the Russians are even more important.

Even though Gao Zhendong's single-board computer still needs to be reinforced and an analog-to-digital conversion circuit needs to be added to collect data, it is still small and exquisite compared to an analog machine.

"Junior brother, how is the output of your machine?"

Gao Zhendong said: "We are relying on imported parts now, but we are working on the localization problem. Not long ago, I have already pulled out silicon single crystals. The next step is to work with related factories to solve the problem of integrated circuit technology. Although it is a little low now, you can't use too much for the time being."

As long as the specific technology of silicon single crystals is not disclosed, there is no need to keep it confidential in front of units and individuals with a sufficient confidentiality level, so Gao Zhendong said it casually.

The Sky Rocket is still under development. In any case, it is guaranteed that the DJS-60D for the experimental missile can still be assembled. Speaking of this, we have to mention Zhenxing Electric. With this white glove that is gradually emerging in the consumer electronics industry, it can still guarantee a part of civilian integrated circuits such as logic gate circuits.

Relevant units and leaders are all aware of this matter. My father-in-law's representative certificate was not obtained just through the one-time transaction of DJS-59. Zhenxing Electric is still renewing it.

Gao Zhendong said this lightly, but the two people from the desert were shocked again: "You also made silicon single crystals?"

Thanks to the convenience of information, they knew the news about silicon single crystals.

Gao Zhendong nodded: "Yes, I did it together with another comrade from the 17th Ministry of Machinery."

Now, the two of them understood why, despite the importance of their work, they needed to apply for permission before communicating with Gao Zhendong about work.

This guy is a pure treasure chest!

What they didn't know was that some of Gao Zhendong's old acquaintances from old units before he came to prominence did not need to apply, such as the Guidance Research Institute, Duan Gong, and Grassland Tractor Factory. Latercomers were all caught in the same trap.

Chief Engineer Zhang was very satisfied with the results of this trip: "Junior brother, I won't say anything else. I will apply for it when I get back. This time, I want to perform a major operation on the missile."

President Cai also smiled and said, "Not only you, I also need to perform surgery here. I want to replace the missile's blood."

"If you exchange blood, you can shoot farther. If I exchange brains, I can use better control algorithms to increase the range while ensuring accuracy. Haha."

A characteristic of inertial navigation is that, in theory, its error is cumulative. Without taking other measures, the longer the range, the greater the error.

Gao Zhendong recalled some things he had seen in his previous life. Although he did not know how to do them, it seemed that bringing them up would be helpful to his senior brother, at least under the premise that the range was required to be longer and longer. "Senior brother, in fact, with digital computers, we can not only use inertial navigation, but also other means."

Senior Brother Zhang takes Gao Zhendong's words very seriously. This junior brother is not only good at his profession, but also has a lot of creative ideas.

"What good ideas do you have? Tell me about it."

Gao Zhendong said: "This method is not very useful for short-range missiles, but it is useful for long-range missiles that need to shoot the ballistic missile out of the atmosphere and fly for a long time."

Chief Engineer Zhang smiled and said, "Is there such a good thing? What I want is a long-range shot. Tell me quickly."

Gao Zhendong nodded: "Starlight guidance, or astronomical guidance."

This is a new concept, and Senior Brother Zhang has never heard of it: "I don't quite understand, can you explain it in detail?"

Gao Zhendong casually drew a diagram on the table: "Here's what I think. For a fixed date, the position of the stars in the sky is fixed. So, with a digital computer, we can let the missile take a star map during flight, calculate the error through the star map, and make corrections. But in the atmosphere, there are very large restrictions on using a camera to take a star map, so I said it can only be used on long-range missiles."

This method is used by both the Americans and the Russians. It is a very reliable auxiliary guidance method for long-range and intercontinental missiles.

When Chief Engineer Zhang heard this, his eyes lit up. This method is reliable. Let the stars guide us. It is so romantic.

Moreover, it does not involve very great technical difficulty and will not bring any negative impact on the equipment.

He stared at the schematic diagram drawn by Gao Zhendong for a long time, and slapped the table: "This is great! When we develop long-range missiles, we must use them no matter what. I will start preliminary research when I go back."

Gao Zhendong smiled and said, "In my opinion, the biggest advantage of this method is not in guidance, but in rapid response."

"Quick response?" Both President Cai and President Zhang became excited. This was a must. Even given our practice of "not firing the first shot", this was more important to us than to other countries.

"Junior brother, what do you mean?"

"I think that fixed missiles need to be equipped with various parameters, right? Under current technological conditions, this is not a simple process. In fact, when our technology develops, we will always have to launch missiles on mobile vehicles."

Train-mobile, road-mobile, air-launched, submarine-launched, these are all mobile vehicles. During the Cold War, there were various and ingenious launch methods. Except for silo-launching, there was no other way of launching without running.

What is installed is not only the target data, but also the data of the missile launch point itself, so that the guidance system knows how far it should fly and in which direction.

However, in the case of striking first, it is very troublesome to set these parameters, and some vehicles don’t even know where they are. This is why when technology is not developed enough, even mobile vehicles still need launching positions, so that they can find where they are.

Even in the future when the global satellite positioning system is well developed, these problems still need to be solved, because for the upper three constants, no one can guarantee that their satellite positioning system will still work normally at that time.

Of course, John Bull doesn't care. Anyway, its missiles are all its conjugated fathers and sons. If the Citigroup solves the problem, it will solve the problem.

"Using starlight guidance, to some extent, we can launch the missile first, and after it leaves the atmosphere, we can determine its position and direction based on starlight guidance, and then strike the enemy with inertial guidance. This cannot completely replace the setting of precise parameters, but at least it provides a more reliable and accurate method, which can simplify the preparation before launch."

Mr. Zhang grabbed Gao Zhendong's shoulders and shook them vigorously: "Junior brother, you have solved a big problem! To be honest, I never thought of going in this direction. Your simple words have saved me several years of hard work!"

Gao Zhendong smiled awkwardly: "I'm just imagining things. I've never done guidance before, so I can't help much. I can only offer some random advice."

Senior Brother Zhang shook his head and said, "You are wrong. Your idea is the most important. With your principle and technical route, the rest of the work is mine! If I can't do this, what kind of chief engineer am I?"

For him, even if this technology takes several years to be implemented, it will not delay him at all, because it is still a long way to go to make long-range missiles, and he can just catch up.

It can be said that Gao Zhendong's remarks solved a major problem of long-range and intercontinental missiles several years in advance.

President Cai smiled and said, "Your junior is really good to you. As soon as you came, he gave you a good magic weapon. It's a pity that my engine can't be quickly reversed now, otherwise I would really be able to form a quick response capability."

For him, now the solid hair can't hit far, and the liquid hair can't hit fast enough.

Solid-state rockets have many advantages, but they have one drawback - their specific impulse is small, so they do not have an advantage in range. This is also the reason why most early ballistic missiles, especially long-range and intercontinental ones, were liquid bombs.

(End of this chapter)