Chapter 1042 KJ-2000 Data Link Antenna
Under Wu Wenjun's urging, Chang Haonan finally nodded.
He originally thought about whether he should donate part of the prize money as a sponsor in his own name, but he was rejected by the former.
According to Academician Wu, Chang Haonan's ability to agree to give his name is already much more important than money.
As for the money issue...
The Chinese mathematics community is a bit poor, but it is not unable to support a scholarship that is expected to have no more than 10 winners each year.
As a result, the "Regular Prize", which will become famous in the Chinese theoretical research community in the future, was determined in a seemingly random manner at the opening ceremony of the 24th International Congress of Mathematicians.
A scholarship is naturally a trivial matter compared to the previous hard work of establishing a mathematics research center.
Chang Haonan doesn't even need to do anything himself.
Just interview a few finalists every year.
If you really can't spare the time, you can entrust others to do it, or you can do it online in a few years.
This is indeed relatively friendly to him.
Therefore, after giving a one-hour report on the morning of the second day of the opening ceremony, Chang Haonan went missing again and did not participate in other subsequent activities of this conference.
Fortunately, the mathematics community is used to this kind of situation, and after all, there are still two "normal people" among the four Philippine Prize winners, so this incident did not cause too big a stir...
In fact, Chang Haonan had already received a large number of invitations in the afternoon after receiving the award.
Just like when the Poincaré conjecture was proved two years ago.
After all, people at home and abroad are quite enthusiastic about giving hats to celebrities in academic circles to gain popularity.
Various honorary degrees, honorary professorships, awards you may or may not have heard of...
Dazzled.
It's hard to say how repulsive Chang Haonan is to this kind of behavior.
What's more, many of them said that they can be awarded remotely according to Professor Chang's personal wishes, or they can be directly expedited and go through the awarding process at the International Congress of Mathematicians.
If he could really get a degree or even a teaching position from a top university like MIT, Princeton or Stanford, he would still be willing to accept it.
However, after the report was completed, he received news from Hao Jing.
The installation phase of the in-cabin equipment of Air Police 2000 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 backend in the cabin, as well as a complete data processing and command and control system.
The gadgets are okay, but many of them are bulky and not easily removable, making it difficult to get them straight in through the cabin door.
For the transport aircraft platform, it can still be sent in through here before the tail hatch is sealed.
But as the Tu-214K is a passenger aircraft, and it is a passenger aircraft that has changed the luggage compartment into a fuel tank, it obviously does not have such conditions.
It can only be put in through the skin opening on the back of the machine before the disk-type radome is installed.
For the Air Police 2000 prototype, which has entered the high-speed stage of modification and changes almost every day, this time window will obviously not be very long.
Moreover, Haofei knew that Chang Haonan was attending the International Mathematics Conference.
In this case, if you contact me midway, there is a high probability that there are some problems that need to be solved by him, but it is just not convenient to talk about it on the phone.
Therefore, after careful consideration, Chang Haonan returned to Haojing before the conclusion of the International Congress of Mathematicians.
…
December 18th.
In the cold wind of winter, Chang Haonan, surrounded by several entourages, walked into the final assembly workshop of Haofei Group.
It's not the one that modified the JH-7 before.
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 aircraft, it is definitely a giant if it is thrown into a tactical aircraft.
In fact, even this current workshop has undergone some equipment modifications.
Otherwise, there is no way to install a huge radome with a diameter of 10 meters on the aircraft.
Today is also the first time that Chang Haonan has seen the appearance of the equipment in the Air Police 2000 cabin relatively completely.
"Mr. Chang."
Liang Shaoxiu, who was wearing work clothes, came forward and shook hands with Chang Haonan warmly:
"I happened to catch up with the project seminar the morning before yesterday, and I specially asked someone to record the scene where you received the award..."
He looked obviously thinner than the last time we met. It was obvious that he was under a lot of work pressure during this period.
In fact, the Air Police 2000 is the only major model in recent years where Chang Haonan has not been involved in aerodynamic and structural design at all.
Moreover, Liang Shaoxiu, as a technician from Nanzheng, is now in charge of a project on the border of Haojing. Even if the two parties have always had a close relationship, it is difficult for them to act as freely as if they were at home.
"It's not that it's not that..."
Chang Haonan put on the work clothes handed over to him and waved his hand:
"Just some thoughts, nothing special worth remembering..."
"If you really want to read it, you might as well read the report I made yesterday morning."
"Hey..."
Liang Shaoxiu showed a free and easy smile:
"The part at the opening ceremony can make my children happy, but how can I understand the report..."
The content of Chang Haonan's report involves the most cutting-edge abstract topics in the field of differential geometry. Even mathematicians may not be able to understand it. As an aerospace engineer, Liang Shaoxiu is indeed a bit difficult to understand.
"Let's go and have a look at the plane."
As Chang Haonan changed into work clothes, the two also ended their chat and returned to the topic.
Under the leadership of Liang Shaoxiu, a group of people immediately arrived near the Air Police 2000, which had entered the most critical stage of modification.
The huge disc-shaped radome sits here, awaiting final installation.
"Mr. Chang, we have tested three data link antenna installation solutions."
Liang Shaoxiu introduced:
"Judging from the communication effect alone, if it is mainly for satellite communications, then installing an additional antenna directly on the top of the radome is the option with the least impact on the design of the entire machine. However, because there has not been time to conduct electromagnetic compatibility testing, this solution Not very cyclically feasible.”
"We have reserved an extra mushroom-shaped space at the top of the radome. When the mass-produced Air Police 2000 enters service, this solution should be directly available."
"But on the prototype..."
He took a step forward and came to the plane with a large piece missing from its back:
"Considering the need for direct communication, we plan to set 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 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 technician who grew up following Chang Haonan's projects throughout the entire process, so he executes the instructions to the letter.
After hearing this, the latter nodded with satisfaction.
"but……"
At this moment, Liang Shaoxiu suddenly said:
"Mr. Chang, during the testing process, we also accidentally discovered some new problems..."
"The reason why I am so anxious to call you back this time is because of this matter."
Chang Haonan's steps then stopped.
It was indeed the same as his guess yesterday.
"Don't be afraid if there are problems."
As he spoke, he turned back and looked at Liang Shaoxiu behind him:
"The purpose of ground testing is to discover problems..."
"That's right."
Liang Shaoxiu breathed a sigh of relief:
"Previously, the communication system of Air Police 2000 included 2 high-frequency and 3 ultra-high frequency radio stations. Since it only required voice communication, the selection of communication protocol was relatively simple. It only needed to be determined based on different transmission distances. ”
"But now, because of the need for command through data links, the types of communication systems have more than doubled than in the past, and they also involve wide and narrowband over-the-horizon voice, data communication links, external tactical databases, etc. There are many different types of information, as well as different anti-interference technologies such as short-wave adaptive frequency selection, spread frequency hopping anti-interference, digital confidentiality, digital information exchange, etc..."
"Although there is no problem with the performance of each communication system itself, before data transmission, different communication methods need to be selected according to the type of data to be transmitted and the transmission target. In this way, the previous manual communication management system is a bit It’s overloaded.”
"For example, during the ground test, when the early warning aircraft is connected to the data link for command, if it wants to communicate with the ground tower via radio at the same time, the communications officer needs to conduct six groups of operations separately. Not only is the efficiency very low, but in actual combat situations there are still Misoperation may occur..."
"..."
"Well..."
Chang Haonan put his hands behind his back, raised his head and fell into thinking.
The situation Liang Shaoxiu mentioned can be simply compared to difficulty in choosing.
Because there are so many forms of communication, if all decisions are left to people, even well-trained professionals will inevitably make mistakes while busy.
So, he quickly concluded:
"So, we need to design a sub-system protocol to include all internal and external communication, 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 non-homogeneous transmission paths..."
"..."
As he gradually analyzed, the eyes of several technicians from the Electronic Technology Group next to him gradually glowed...