Chapter 317 Pick the big one
The power supply capacity, equipment volume, and means diversity advantages of warships are obviously much larger than those of missiles. This determines that warships can use various means, active, passive, There are various methods such as chaff, angular reflection, active decoys, etc., and they have wide coverage and high power, and the missile itself cannot compete at all.
So if you want to rely on computers to improve anti-interference capabilities under existing conditions, there is no hope of relying solely on radar cooperation, and you can only find another way.
Speaking of this, Comrade Lao Qi is not sleepy.
"Consultant Gao, please tell me more specifically." If you know how to speak, please speak more.
Gao Zhendong said: "In my opinion, with the advancement of electronic technology and other technologies, all equipment will face two shortcomings in capabilities, one is anti-interference ability, and the other is target recognition ability."
< br>These two concepts are relatively new at this time. In fact, they are the same thing to some extent, but they are not exactly the same. This makes Mr. Qiu and Qi Gong pay more attention to it. After all, electronic countermeasures in missile operations are Contact with the U-2 only began after 1962 during anti-aircraft operations.
At this time, the world did not have electromagnetic interference technology for anti-ship missiles, otherwise the Pharaoh's first kill record would not be so easy to obtain.
"Interference? Advisor Gao, would like to hear the details."
Gao Zhendong said: "The current missiles use terminal active radar guidance, right? As the defensive side, theoretically Many means can be used to interfere with the missile's radar."
Gao Zhendong gave a general introduction to the various active and passive interference methods, but he didn't go into too much detail. As for why he knew these technologies that didn't even exist yet, you'd be a genius if you ask me. I learned by myself and just imagined.
Although electronic technology will continue to advance by leaps and bounds in the next few decades, looking at its basic principles, it is not an exaggeration to say that it is "old". The latest basic semiconductor theory was also developed a few years ago. I brought it up, but Gao Zhendong’s talk has nothing to do with semiconductors.
Control of electromagnetic power is called the "invisible battlefield". One advantage is that even if Gao Zhendong relies on his words, others will not be able to find anything wrong. Now that there is no one, why don't I be allowed to think ahead? ? If you can't think of it, does it mean that I can't think of it even if it's limited?
Qiu and Qi were stunned by Gao Zhendong's introduction.
"Corner reflector?"
"Chaff interference cloud?"
"Full frequency blocking?"
"Threshold coverage?"
"."
The simplest of them all , undoubtedly the corner reflector, and then the chaff interference cloud.
These two things don't require any high-tech equipment, and they don't cost a lot of money, but when it comes to the effects, Lao Qi himself knows best.
The two looked at each other and couldn't help but break out in a cold sweat. If Consultant Gao really used this method, it would be up to the sky to see how high the hit rate would be.
The two of them looked at me and I looked at you, and asked what they were most concerned about: "How to solve it?"
Gao Zhendong spread his hands: "There is no need to solve it for the time being, and there is nothing we can do." The solution, if you have to say it, must wait for the development of technology.”
Mr. Qiu:?
Qi Gong:? !
Consultant Gao, what do you mean by this? It is very unkind for you to ask a question and then walk away.
Seeing their appearance, Gao Zhendong said: "I have analyzed that the enemy has not thought of this yet. They will not react without suffering some losses, so there is no need to solve it for the time being."
"As for saying that it cannot be solved, fundamentally speaking, to eliminate this impact requires the development of technology, even with radar-related technology, it cannot be eliminated, it can only be weakened, and it must be combined with other technical means To solve the problem."
Weaken? No matter whether it is weakened, no technical means is 100% reliable. Similarly, if it can increase the probability of hitting, it can also be regarded as solving the problem to a certain extent.
Qi Gong was impatient: "Advisor Gao, please tell me how to weaken it."
As the person in charge of the guidance system, for him, what Gao Zhendong just said is no different. It was a bolt from the blue, although I knew that none of these methods were 100% reliable, but if the hit rate of a bomb dropped from 90% to 45%, ensuring combat effectiveness would not be as simple as doubling the missiles.
Gao Zhendong started counting with his fingers.
“One is to improve the radar, enhance the radio frequency performance of the radar itself, or enhance the signal processing capabilities of the radar back-end, use better signal processing algorithms, and improve the overall performance of the radar under limited radio frequency performance. Improve further.”
This is the best way to solve the problem, but it is not that difficult. "Backend? Then DJS-60D is even more important." Mr. Qiu said.
Gao Zhendong nodded: "It will be useful, but I have doubts about whether the DJS-60D's computing power can meet the demand. Radio frequency signal processing, a general-purpose computer, is not a strong point. There are a lot of volumes in signal processing. The structure of DJS-60D is inherently unsuitable for calculation operations such as product operations, Laplace transform, Fourier transform, and z-transform, and its performance may be limited.”
Why did I once engage in radar? Instead of discussing the CPU, everyone is talking about FPGA/CPLD or DSP chips, and that's the problem.
At that time, the capabilities of the CPU were limited, and it was almost useless to use it for signal processing, unless it was a specialized DSP chip. But at that time, we knew all the DSP chip technology.
No matter how large the equipment of the radar is, it has not reached the level of making a dedicated chip for it. At this time, the internal transistor connections can be freely programmed, and once the programming is completed, the FPGA can realize high-speed computing at the hardware level. /CPLD can come in handy.
As soon as Gao Zhendong said this, Qi Gong knew that Gao Zhendong had really considered this issue, and had even studied it specifically. The automation major these days does not necessarily have such a broad knowledge of radio frequency, time domain, and frequency domain things.
Following Gao Zhendong’s train of thought, this was indeed the case. He didn’t know about DJS-60D, but he knew about its previous generation DJS-59, which was used to process radar signals. Indeed It's not that interesting, and it's not very efficient.
Seeing that he was a little disappointed, Gao Zhendong said: "Although computers are not very useful for processing radio frequency signals, they are not completely useless. At least they can carry out research on digital signal processing technology in advance, and design It’s appropriate, and it will change the current situation. What I want to use is actually the other capabilities of computers: memory and motion trajectory calculation.”
These two capabilities are really not so-called analog computers. It can be done easily.
Seeing Gao Zhendong’s clear thinking, Qi Gong also had confidence in his idea: “Consultant Gao, please give me some advice.”
Gao Zhendong drew a schematic diagram of a ship and a missile on paper: "My idea is this. The missile-borne computer stores the position and movement status of the target signal at any time. When the missile-borne computer determines from the radar signal echo that it has been interfered with, the target is lost, or suddenly When there is a new target with a large azimuth jump, we no longer rely on radar guidance, but calculate its movement trajectory based on the target's final position and movement state, and then fight along this movement trajectory! ”
This set actually has the meaning of early interception of ballistic missiles.
The early interception of ballistic missiles was not so much about finding a target to hit as it was about calculating the trajectory.
Find the target and hit it. Apart from other things, the requirements for interceptor missiles are too high. Fortunately, the trajectory of ballistic missiles is basically fixed, so the target trajectory is calculated, and the interceptor missile is directly Run to the predetermined airspace, and then rely on terminal guidance to solve the problem.
To be more brutal, if you want some kind of unguided guidance, go directly to Big Ivan.
When Qi Gong heard Gao Zhendong's idea, he thought about it and thought it was really interesting. Can't he see it? Then I'll be fooled, if I'm fooled with evidence, my hit rate will definitely be higher than that of pure blind fooling.
Mr. Qiu also nodded: "Well, this method is interesting and can solve part of the problem."
Gao Zhendong smiled and said: "Actually, with the missile-borne computer, we can do other things For example, if you fly to the target area and find multiple targets, you can choose to attack according to the preset mode. For example, as mentioned above, you can always track or attack the intended target regardless of the signal quality. Another example is, pick the big one and attack it! br>
Gao Zhendong still couldn't hold back and brought out this famous joke in the military fan circle.
Qiu and Qi were stunned for a moment. After thinking about it, they thought it was really interesting: "This is a good idea. There are multiple preset attack modes. Like the mode just now, it can be used to attack enemy transport ships. Team, the bigger ones have more pretense.”
"Lao Qi, don't mention it. This kind of processing involving preset modes and multiple attack processes is really difficult to solve without a computer."
The four people discussed in Gao Zhendong's office for a while, and the other three People discuss, Su Weihua is mainly responsible for recording.
At the end, we are mainly talking about fire control and command. After all, the fire control and command system with or without a computer is completely different. Computers are not omnipotent, but they can make many functions simpler, more direct, more visual and more user-friendly.
Finally, Mr. Qiu brought up another purpose of his visit: "Consultant Gao, I heard that you still have a prototype of the DJS-60D? Is it convenient for you to provide us with one?"
Gao Zhendong was stunned, good guy, you are still thinking about this, right?
He calculated it and found that he had machine No. 0 on hand, which was enough for use. He had left two machines for emergency use. In this situation, it was quite suitable.
The sooner they can get the DJS-60D, the sooner they can start research on strapdown inertial navigation and fire control command systems. Both of these are actually common technologies and can be easily extended to other missiles and aircraft. , used on ships.
So Gao Zhendong didn't hide his secrets: "Yes, there are, but not many. I can only give you one."
This is what everyone needs when they are quick and slow. Whoever mentions this thing first, let alone Su Weihua's relationship here.
Mr. Qiu was overjoyed. No matter how big a role Xiao Su played in it, it was always right to bring him here: "That's great, Consultant Gao, I will go through the relevant procedures right away."
(End of this chapter)