Chapter 178 Active Phased Array Radar

After getting Xu Yuan's consent, Dai Zhigang's first thing when he returned to the institute was to find Academician Song Wencong and explain the relevant situation, especially Xu Yuan's talent and level in the field of computer science.

Song Wencong always thought that Xu Yuan was good at only mathematics and engineering mechanics.

I didn't expect that he was so knowledgeable about computers.

The key point is that this is just the result of finding inspiration and learning besides studying mathematics.

It makes people really appreciate the importance of talent.

Because of this incident, he even felt accustomed to any surprising performance by Xu Yuan in the future.

Naturally, he was very supportive of Xu Yuan's participation in the optimization of the flight control system software.

After all, if the flight control system passes the test as soon as possible, this latest generation of domestically-produced stealth fighter can also make its maiden flight as soon as possible.

Give the whole world a big surprise.

Facts have proved that Xu Yuan's participation in the research of fly-by-wire flight control system software has indeed brought the overall efficiency to a higher level, especially the progress of software algorithm optimization has been like a rocket.

The values ​​of several units that were originally problematic returned to normal after Xu Yuan's adjustments.

Dai Zhigang was undoubtedly very happy about this.

I am happy that I made the right decision by inviting Xu Yuan to participate in the optimization.

Finally, as time entered late October, Xu Yuan proposed to conduct another onboard ground test.

……

Thursday, October 2007, 10, Jincheng Aircraft Design Institute.

When Song Wencong heard Xu Yuan's proposal, even though he trusted Xu Yuan very much, he couldn't help but ask more about the situation.

"Does the fly-by-wire flight control system already meet the needs of fighter jets?"

He clearly remembered that when the results of the last ground test were not ideal, Dai Zhigang said that time was needed for further optimization.

Now, only more than half a month has passed, and we are already able to carry out a new round of onboard ground tests.

Is it because of Xu Yuan’s joining?

Compared to Song Wencong's surprise, Dai Zhigang had a smile on his face. During the time he came to Jincheng, he had never been as confident as he was today.

Faced with Song Wencong's question, Xu Yuan couldn't wait to give an answer without waiting for him to speak.

"Professor Xu seems to be very knowledgeable about the aircraft's fly-by-wire flight control system. In addition to optimizing the software algorithm, he also gave constructive suggestions on other issues he found."

“That’s why we were able to complete the upgrade so quickly.”

"Judging from the current performance of the flight control system, it does meet all the requirements for onboard ground testing," Liang Zhanjun next to him added.

It can only be said that during the time that Xu Yuan participated in the research of the flight control system, they were both completely convinced.

Upon hearing this, Xu Yuan said calmly: "The performance of the upgraded flight control system can only be accurately judged through detailed testing." He is also looking forward to the on-board test.

After listening to what they said, Song Wencong couldn't help but feel excited.

Just as Xu Yuan said, the specific performance of the flight control system does require various tests and experiments to get accurate results.

Whether it's a mule or a horse, you should always take it out for a walk.

With this thought in mind, Song Wencong immediately made a decision and made arrangements.

"Then let's schedule the ground test for tomorrow. I'll be waiting for your surprise then."

that's it.

After leaving Academician Song Wencong's office, Xu Yuan, Liang Zhanjun, Dai Zhigang and others immediately began to prepare for tomorrow's experiment.

Since a test had already been conducted last month, it didn't take too long in advance.

The next day.

Around eight o'clock in the morning.

All members of the domestically-produced latest-generation stealth fighter project came to the test site after receiving the news, wanting to witness the performance of the fly-by-wire flight control system.

Everyone was looking forward to it.

As a member of the project, everyone knows that the aerodynamic layout of the J-20 is destined to place stringent requirements on the fly-by-wire flight control system.

But if they can develop a flight control system that is perfectly suited for the J-20, it will mean that the domestically produced flight control system has matured, and the future development of the latest generation of bombers and transport aircraft will be much more efficient.

In addition, if the onboard ground test is successful, the formal flight test will be carried out next.

So it won’t be long before this domestically-made fighter jet is launched.

After all relevant personnel were in place, Song Wencong did not waste any more time and immediately issued the test order.

"let's start."

After saying that, he turned around and said to Xu Yuan: "Seeing that you are still so calm, I feel much more relaxed."

Considering that Dai Zhigang and Liang Zhanjun were in charge of the last onboard ground test, Xu Yuan did not personally participate this time, but stayed outside with Song Wencong and waited patiently for the results.

After all, he personally participated in upgrading the flight control system, so he must be very confident about it.

It is normal for Song Wencong to be infected by this mentality.

In response, Xu Yuan said with a smile: "Don't worry, Academician Song, you will definitely get this surprise today."

While Xu Yuan and Song Wencong were communicating, Liang Zhanjun and Dai Zhigang officially got to the point.

-

“Begin software testing and validation.”…

"Test completed."

"Now we will conduct the electromagnetic compatibility test of the whole aircraft."

……

“Next is testing structural modal coupling.”

……

As each specific test is completed, the performance report of the fly-by-wire flight control system is gradually improved.

Perhaps because of the confidence in the latest version of the flight control system, more items were carried out during the specific test than last time, so it took longer.

However, everyone is waiting patiently, wanting to know the test report results as soon as possible.

Another half hour passed.

Liang Zhanjun finally got the test report from the engineer. He immediately opened it, lowered his eyes to take a look, then closed it again and said to Dai Zhigang beside him with a smile on his face:
"Thank you for your hard work, Professor Dai. Let's go report to Academician Song."

When Dai Zhigang saw this scene, he knew that he must be very satisfied with the numbers in the report.

Immediately, he smiled knowingly and said, "It's time to give everyone a surprise."

As they spoke, the two of them hurriedly walked towards Song Wencong and Xu Yuan.

Song Wencong noticed the two people and asked impatiently before they came closer:

"Has the test report come out? How did it perform?"

Liang Zhanjun naturally would not keep the matter in suspense at this time. He quickly handed over the report and explained the situation without concealing his joy.

"The performance of our flight control system has far exceeded the original expected values."

"It can definitely bring the performance of the fighter to its maximum."

After hearing what Liang Zhanjun said, Song Wencong immediately opened the report file and read it carefully.

Several minutes passed before he was willing to look away.

And handed the report in his hand to Xu Yuan.

"What you just said is absolutely right. This is indeed a big surprise."

Xu Yuan listened to Song Wencong's words, took the report and glanced at it as well, but he seemed calmer than the others.

Judging from the data in this test report alone, the performance of the flight control system is indeed excellent, especially when facing a fighter with such a complex aerodynamic layout.

There is no doubt that their upgrade of the system was successful.

It can ensure that the fighter jets can exert their ultimate maneuverability during flight combat.

In addition, during the upgrade of the fly-by-wire flight control system, he was also paying attention to the progress bar on the panel.

Confirm that the single-item fly-by-wire flight control system has reached 100%.

So he was not surprised by today's test results.

"With this test report data, we can conduct flight tests next."

He said this with a smile, and then handed the report data to Professor Dai Zhigang sitting opposite him.

Hearing this, Song Wencong nodded and smiled, "It's not just a flight test. If things go well, the official maiden flight will definitely be achieved before the Olympics next year." He said this without disguising the anticipation in his eyes.

Just when the conversation reached this point and everyone was filled with joy, Liang Zhanjun sighed.

"Unfortunately, it is still equipped with a passive phased array radar, which is still a little behind the most advanced Raptor fighter jets overseas."

Xu Yuan was previously responsible for the appearance of fighter jets, and did not have a deep understanding of the airborne radar. After all, in his impression, the active phased array radar used should be more effective.

Suddenly hearing Liang Zhanjun say this, he quickly asked: "As our latest generation of stealth fighter, the J-20 must have the most advanced radar module to compete with overseas fighters, otherwise the gap will be huge."

After all, radar is the equivalent of the eyes of a fighter plane. Even if its physical condition is better than that of overseas fighter planes, it still cannot exert its maximum advantage if its eyes are not good.

Song Wencong naturally understood this logic, and took the initiative to explain without waiting for Liang Zhanjun to answer.

It turns out that when the project was first launched, the institute was planning to develop a more powerful active phased array radar.

However, due to the limitations of the electronics industry, the yield rate of the core component modules of active phased array radars is not high, so we had no choice but to decide to use passive phased array radars as a transition.

The airborne radar will be upgraded and replaced later.

After hearing this, Xu Yuan thought of the latest generation of domestic stealth fighter jets, because he came up with the aerodynamic layout and appearance design, it can be said that it had been released several years ahead of schedule.

It is reasonable that the airborne radar has not been upgraded.

However, now that the fifth-generation fighter jets have come out, we must not leave any regrets.

Otherwise, the overall performance of the fighter jet will be compromised and its deterrent effect overseas will also decrease.

These questions flashed through his mind quickly, and then Xu Yuan suddenly said to Song Wencong with a serious face: "When the project was first launched, we said that we would make the best fighter jet, so our fifth-generation aircraft must be equipped with an active phased array radar with better performance."

"When I was proving difficult problems related to number theory, I also studied active phased array radars. Perhaps I can design a radar solution that is more suitable for the J-20."

Song Wencong had just said earlier that he was not surprised by Xu Yuan's strength, but after hearing that he was going to design an active phased array radar for fighter jets, he couldn't help but exclaimed.

I never expected that Xu Yuan was also researching active phased array radar.

In fact, it was not just him, Liang Zhanjun and Dai Zhigang next to him also widened their eyes.

……

(End of this chapter)