Chapter 1042 KJ-2000 Data Link Antenna

Under Wu Wenjun's strong persuasion, Chang Haonan finally nodded.

He had originally thought about whether he should donate part of his prize money as sponsorship in his personal name, but was rejected by the former.

According to Academician Wu, the fact that Chang Haonan agreed to use his own name is much more important than money.

As for the money issue...

The Chinese mathematics community is a little poor, but it is not so poor that it cannot afford to sponsor a scholarship that is expected to have no more than 10 winners each year.

Thus, the "Chang Prize", which would later become famous in China's theoretical research community, was determined in a seemingly casual manner at the opening ceremony of the 24th International Congress of Mathematicians.

A scholarship is naturally a small matter compared to the tough task of establishing a mathematics research center.

Chang Haonan doesn't even need to do anything himself.

Just interview a few final shortlisted candidates each year.

If you really can't spare the time, you can entrust it to someone else, or you can do it online in a few years.

This is indeed more friendly to him.

Therefore, after giving a one-hour report on the morning of the second day after the opening ceremony, Chang Haonan disappeared again and did not participate in any other subsequent activities of this conference.

Fortunately, the mathematics community is used to this kind of situation, and there are still two "normal people" left among the four Fields Medal winners, so this incident did not cause too much waves...

In fact, Chang Haonan had received a large number of invitations on the afternoon of the same day after receiving the award.

Just like when the Poincare conjecture was proved two years ago.

After all, people both at home and abroad are quite keen on praising academic celebrities and gaining popularity.

Various honorary degrees, honorary teaching positions, awards that you may or may not have heard of...

Dazzled.

It’s not true to say how much Chang Haonan is disgusted by this kind of behavior.

What’s more, many of them said that the award could be made remotely according to Professor Chang’s personal wishes, or it could be expedited and the award procedure could be carried out at the International Congress of Mathematicians.

If he could really get a degree or even a teaching position at a top university like MIT, Princeton or Stanford in this way, he would be willing to accept it.

However, after completing the report, he received news from Haojing.

The installation phase of the KJ-2000's cabin equipment has come to an end.

In addition to the large antenna on the back of the aircraft, the early warning aircraft also needs to install a radar back end in the cabin, as well as a complete data processing and command and control system.

The gadgets are fine, but many of them are large and difficult to remove, making it difficult to get them directly into the cabin door.

For the transport aircraft platform, it can still be sent in through here before the tail hatch is sealed.

But Tu-214K is a passenger plane, and one whose luggage compartment has been converted into a fuel tank, so it obviously does not have such conditions.

It can only be inserted through the skin opening on the back of the aircraft before the disc-shaped radome is installed.

For the KJ-2000 prototype, which has entered the high-speed modification stage and is changing almost every day, this time window will obviously not be long.

Moreover, Gao Fei knew that Chang Haonan was attending the International Mathematical Congress.

In this case, if you contact him midway, there is a high probability that there are some problems that need him to solve, but it is just not convenient to talk about it on the phone.

Therefore, after careful consideration, Chang Haonan returned to Haojing before the closing of the International Congress of Mathematicians.

……

12 month 18 day.

In the cold winter wind, Chang Haonan, surrounded by several entourage members, walked into the final assembly workshop of Gaofei Group.

It is not the one that was modified into the JH-7 before.

But it was used to assemble the H-6 in the past.

After all, although the 110-ton platform is not very large when placed in a passenger plane, it would definitely be a giant if thrown into a tactical aircraft.

In fact, even the current workshop has undergone special equipment modifications.

Otherwise, it would be impossible to install the huge radar dome with a diameter of 10 meters on the aircraft as a whole.

Today was also the first time that Chang Haonan saw the equipment inside the KJ-2000 cabin relatively completely.

"Mr. Chang."

Liang Shaoxiu, dressed in work clothes, came forward and shook hands with Chang Haonan enthusiastically:

"The day before yesterday, we happened to have a project seminar this morning, and I specially asked someone to record the part where you accepted the award..."

He looked noticeably thinner than the last time we met, and it was obvious that he had been under a lot of work pressure during this period.

In fact, KJ-2000 is the only major model in recent years in which Chang Haonan had no involvement in the aerodynamic and structural design.

Moreover, Liang Shaoxiu, as a technical staff from Nanzheng, is now in charge of a project in Gaojing. Even though the two sides have always had a close relationship, it is difficult for him to control his position freely as if they were relatives.

"It's not that it's not that..."

Chang Haonan put on the work clothes handed to him and waved his hand:

"Just some thoughts, nothing special to remember..."

"If you really want to read it, you might as well read the report I made yesterday morning."

"Hey..."

Liang Shaoxiu showed a carefree smile:

"The part at the opening ceremony can make my children happy, but how can I understand the report..."

Chang Haonan's report involved the most cutting-edge and abstract topics in the field of differential geometry, which even mathematicians might not be able to fully understand. As an aerospace engineer, it was indeed a bit difficult for Liang Shaoxiu to understand.

"Let's go and check out the plane."

As Chang Haonan changed into his work clothes, the two ended their chat and returned to the main topic.

Under the leadership of Liang Shaoxiu, a group of people immediately came to the KJ-2000 which had entered the most critical stage of modification.

The huge disc-shaped antenna cover is placed here, awaiting final installation.

"Boss Chang, we have tested three different data link antenna installation options."

Liang Shaoxiu introduced:

"Judging only from the communication effect, if it is mainly for satellite communication, then directly installing an additional antenna on the top of the radome will be the option with the least impact on the overall aircraft design. However, since there is no time to conduct electromagnetic compatibility testing, this solution is not feasible in terms of the cycle."

"We have reserved an extra mushroom-shaped space on the top of the radome. When the mass-produced KJ-2000 enters service, this solution should be directly used."

"But on the prototype..."

He walked over to the plane with a large piece missing from its back.

"Considering the need for direct communication, we plan to install the antennas at the top of the vertical tail and under the nose to cover the communication needs of the upper and lower hemispheres respectively. At the same time, we will keep the data link antenna as far away from the radar antenna as possible to reduce the trouble caused by electromagnetic compatibility..."

"..."

Liang Shaoxiu is a technical staff who grew up while working with Chang Haonan on the project, so he carries out the instructions to the letter.

After hearing this, the latter nodded with satisfaction.

"but……"

At this moment, Liang Shaoxiu's tone suddenly sank:

"Boss Chang, during the testing process, we accidentally discovered some new problems..."

"The reason why I called you back so urgently this time is because of this matter."

Chang Haonan stopped walking.

It turned out to be just as he had guessed yesterday.

“Don’t be afraid of problems.”

He turned around and looked at Liang Shaoxiu behind him:

"Ground testing is meant to discover problems..."

"That's it."

Liang Shaoxiu breathed a sigh of relief:

"Previously, the KJ-2000's communication system included two high-frequency and three ultra-high-frequency radio stations. Since only voice communication was required, the selection of the communication protocol was relatively simple, as long as it was determined according to different transmission distances."

"But now, because of the need to conduct command through data links, the types of communication systems have more than doubled compared to the past, and they also involve a variety of different information categories such as wide-band and narrow-band beyond-line-of-sight voice, data communication links, external tactical databases, and shortwave adaptive frequency selection, spread frequency hopping anti-interference, digital confidentiality, digital information exchange, and other different anti-interference technologies..."

"Although there are no problems with the performance of each communication system itself, different communication methods need to be selected according to the type of data to be transmitted and the transmission target before data transmission. As a result, the previous manual communication management system is a bit overloaded."

"For example, during ground testing, when the AWACS aircraft is connected to the data link for command, if it wants to communicate with the ground tower via radio voice at the same time, the communications officer needs to perform six sets of operations alone. Not only is the efficiency very low, but there is also the possibility of misoperation in actual combat..."

"..."

"Well……"

Chang Haonan put his hands behind his back, raised his head and fell into thought.

The situation Liang Shaoxiu described can be simply compared to decision-making difficulty.

Because there are so many forms of communication, if all decisions are left to humans, even well-trained professionals are bound to make mistakes in a hurry.

So he quickly concluded:

"So, we need to design a subsystem protocol that covers both in-machine and out-of-machine communications, so as to automatically select the appropriate communication form and technology for different data types... But it cannot be the traditional TCP protocol, or at least it needs to be improved so that it can adapt to heterogeneous transmission paths..."

"..."

As he analyzed it step by step, the eyes of several technicians from the Electronic Technology Group next to him gradually lit up...