Chapter 991 is a genius and an all-rounder

Zhao Zhongyao took the remote control, commanded the model aircraft he designed, and began to fly in the sky. Liu Changyun really didn't expect that the model aircraft designed by Zhao Zhongyao could really fly in the sky.

Zhao Zhongyao used the remote control to control his model airplane, doing all kinds of difficult actions in the sky. Liu Changyun was a little dazzled when he saw it. He really didn't expect that this piece of model aircraft designed by Zhao Zhongyao could not only fly, but also make some difficult actions in the air. This model airplane is very free and flexible in the air, which makes people feel that the performance of this model airplane is very good. It is also very difficult to design such a model aircraft. Moreover, it is necessary to have a certain knowledge of aircraft design to be able to design such an advanced model aircraft.

"Zhongyao, this model aircraft you developed is really good. How did you develop it, what was this thing made of, it looked. It's about the same as a real plane. Liu Changyun was a little curious now, he looked at Zhao Zhongyao, who was still remotely controlling the model airplane, and said.

"Well, this plane is made of plastic steel. Zhao Zhongyao looked at Liu Changyun again and said. "Oh, a kind of plastic steel, is that steel or not. Liu Changyun listened to Zhao Zhongyao's words, and looked at him with some puzzlement and said.

"Since it's plastic steel, of course it's not real steel. Just a very strong plastic. Zhao Zhongyao said again.

"That's the case, then can you tell me more about how you developed this model aircraft now, and tell me in more detail. I'm curious to know about this now. Liu Changyun looked at Zhao Zhongyao again and said.

"Okay, then you let me land this plane on the ground first. Zhao Zhongyao said, and used the remote control to smoothly descend the plane from the sky to the ground.

"Zhongyao, this model airplane you designed, flying fast and smooth, I really don't know, how did you design it, are you very experienced in the development of model airplanes!"

Liu Changyun now wants to know how Zhao Zhongyao developed such an advanced model aircraft fighter. After all, he had not seen such a model airplane before.

"Leader, do you want to know how the model airplane was developed!" Zhao Zhongyao put the remote control on the wing of the model airplane, and looked at Liu Changyun again.

"That's right, I just want to understand the basic knowledge of developing model airplanes, when I was a child, I was also very excited about model airplanes, and I also wanted to develop a model airplane by myself, but I didn't have the ability to do this. Now that I see this model airplane you have developed, I want to know a little bit about this knowledge. ”

When Liu Changyun was a child, he was very interested in model aircraft. But when he was a child, his family was also very poor, and the country's science and technology were not developed. There has not been much progress in the development of aircraft. The country's large planes are all imported from abroad. Some high-tech model airplanes are also imported from abroad. Ordinary people simply can't afford to buy such a model aircraft. Liu Changyun has only seen these high-tech model aircraft on TV, but he has never seen them in reality.

Today, it was the first time he really saw a model airplane. And it's a very special model airplane. When he saw this special model aircraft developed by Zhao Zhongyao, he also wanted to know how Zhao Zhongyao developed such a model aircraft. Liu Changyun also wants to learn from Zhao Zhongyao.

"Okay, then let's go to your office and talk slowly! There are also a lot of basic knowledge in the development of model airplanes, which cannot be explained clearly in a few words. Zhao Zhongyao looked at Liu Changyun and said.

"Okay, of course, just go to my office!" Liu Changyun listened to Zhao Zhongyao's words, and naturally agreed happily.

After Zhao Zhongyao finished speaking, he looked at Liu Tianming again and said, "Director Liu, can you help me move this model aircraft to the car!"

Liu Tianming listened to Zhao Zhongyao's words, smiled and said, "Why can't you, here, I won't help you, who will help you." After speaking, together with Zhao Zhongyao, he lifted this model aircraft into the car again.

The three of them went upstairs together and came to Liu Changyun's office.

After arriving at the office, Liu Changyun let Zhao Zhongyao and Liu Tianming on the sofa.

Liu Changyun himself sat on the sofa opposite. He now looked at Zhao Zhongyao and said: "Zhongyao, you can tell me some knowledge about the development of model aircraft now, I am really interested in these things."

After listening to Liu Changyun's words, Zhao Zhongyao smiled and said: "Okay, then I'll tell you some of the knowledge I know about the development of model aircraft!"

After speaking, Zhao Zhongyao paused, thought for a while, then looked at Liu Changyun again and said: "The model aircraft is mainly composed of two parts: the model aircraft and the model aircraft remote control, let's talk about the model aircraft remote control first." Wait a minute, let's talk about model airplanes. ”

After speaking, Zhao Zhongyao thought about it again, and then continued: "Common wireless remote control is different according to the use of technology, mainly infrared remote control and 2.4G remote control. Infrared remote control has the characteristics of narrow direction range and short distance, so the model airplane remote control basically uses 2.4G wireless remote control. First of all, we need to give a brief introduction to 2.4GHz wireless technology and standards.

2.4GHz wireless technology has become the mainstream transmission technology for wireless products. The so-called 2.4GHz refers to a working frequency band 2400M-2483M range, which is used worldwide without application.

However, due to the different scope of application. The same 2.4G frequency is used as the carrier, and the communication methods derived from different communication protocols will be very different. In terms of the amount of data transmitted alone, there is a difference from 1 Mbit/s to 100M/s.

The remote control of the model aircraft uses a kind of wireless protocol in the 2.4GHz ISM frequency band, which is called the 2.4GHz wireless communication protocol.

The 2.4G wireless communication module works in the world without applying for 2.4GHz ISM channels, and the frequency range is 2400MHz-2483MHz. Realize the automatic frequency sweep function at startup, with a total of 50 working channels. The model airplane remote control on the market basically uses a 2.4G wireless communication module, and the corresponding remote control will be equipped with a receiver. The remote control (transmitter) and receiver need to be paired for use, and different manufacturers are generally not compatible, because the transceiver chips and protocols used may be different.

There is a difference between domestic and imported remote control. The difference between domestic remote control and imported remote control is that one is the gap in radio technology, and on the other hand, there are too few domestic R&D institutions and have not undergone long-term product testing.

Domestic remote control uses relatively cheap electronic components, so the cost is relatively low, especially the receiver, receiver chips, good receivers are imported chips, so it is very stable, the program is better, and the cheap receiver chip is cheaper, so it is easy to have accidents.

A very simple example, the potentiometer on the remote control, the domestic equipment is used in the domestic potentiometer The general life of the domestic potentiometer is 10~300,000 times, and the potentiometer of the imported equipment can reach 1 million times, which directly affects the life of the remote control.

It is generally believed that the workmanship of the remote control is the best JR remote control, and the circuit layout is very good in all aspects, especially at present, only the JR remote control is equipped with a fuse, if the enthusiast accidentally short-circuits, only the fuse needs to be replaced, which is more humane, and more importantly, the JR remote control is all made abroad, and the quality is guaranteed.

So the remote control is a thing that costs a penny. The expensive imported remote control naturally has a reason why it is expensive. The cheap domestic remote control also has a reason why it is cheap.

Now there are more and more manufacturers of domestic remote controls, and the preferential price makes the threshold of model aircraft lower and lower, so we can reasonably choose our own remote control according to our own economic strength. ”

After Zhao Zhongyao said this knowledge, he looked at Liu Changyun again and said, "How about it, Minister Liu, you can still understand the knowledge you told me!"

After listening to Zhao Zhongyao's knowledge, Liu Changyun felt that he didn't understand it. However, in front of Zhao Zhongyao, he was embarrassed to say that he didn't understand at all. After all, he is a leader and also has a university diploma, how can he say that he does not understand this knowledge.

Thinking of this, Liu Changyun looked at Zhao Zhongyao and said, "Well, I can almost understand." It's just that you just talked about the knowledge of remote control, can you talk about some more things about how to conduct remote control. ”

Zhao Zhongyao listened to Liu Changyun's words, thought about it again and said, "Okay, I'll talk about the flight controller again." ”

After speaking, Zhao Zhongyao began to give a lecture to Liu Changyun again: "The flight controller is the soul of multi-rotor aircraft. So what is a flight controller? The flight controller is the electronic control part of the aircraft, the full name is the flight controller, and the flight control mainly includes the main control processor MCU and the inertial navigation module (sensor part).

Compared with model aircraft such as helicopters, the most complex part of a quadcopter is the electronic part. It can be compared with fixed-wing and helicopters. On conventional fixed-wing model airplanes, gyroscopes are not commonly used. If the direct upgrade model aircraft is relatively difficult to control, if the automatic stabilization system is not done, the gyroscope is only used for tail locking. The quadcopter must be equipped with a gyroscope, which is the most basic requirement, otherwise it will not be able to fly, let alone fly steadily. Not only must there be, but also have to have all three dimensions, which is determined by the mechanical structure and dynamic composition characteristics of the quadcopter. On this basis, supplemented by a 3-axis acceleration sensor, these 6 degrees of freedom constitute the basic part of flight attitude stability, and it is also the key core part of the inertial navigation module, referred to as IMU. In-flight attitude sensing depends on this IMU, which shows that it is the core component of the entire model.

The IMU senses the attitude of the aircraft in the air and sends the data to the main control processor MCU. The main control processor MCU will control the stable operation of the aircraft through the flight algorithm according to the user's operation instructions and IMU data. Because there is a large amount of data to be calculated, and it requires extremely high real-time control, the performance of the MCU also determines whether the aircraft can fly stably and flexibly enough. ”

Zhao Zhongyao told Liu Changyun some knowledge of the main controller of the model aircraft. After Liu Changyun listened, he felt that he had really grown a lot of knowledge. At this time, he really admired Zhao Zhongyao. Originally, he thought that Zhao Zhongyao might not know much about model airplanes. After all, he is only a military expert, and not an expert in the study of aircraft.

But now Zhao Zhongyao told Liu Changyun about these model aircraft knowledge, which Liu Changyun had never heard of at all.

"Zhongyao, what you said is really good, you are really knowledgeable!" Liu Changyun listened to Zhao Zhongyao's knowledge about model aircraft, and he admired Zhao Zhongyao's knowledge even more.

In order to develop this model airplane, I also learned a lot of knowledge about model airplanes. Zhao Zhongyao looked at Liu Changyun again and said.

Originally, before Zhao Zhongyao, when he was in the 'Zhuhai Aviation College', in order to study model aircraft, he also learned a lot of knowledge about model aircraft. After all, a qualified aircraft designer must learn about model aircraft. First of all, it is necessary to study a model aircraft, first test the performance of this aircraft, and see what advantages and disadvantages this aircraft has. There is only constant revision. In order to develop a truly large aircraft, there will be fewer problems, or no problems.

"You're so powerful at this moment, so if you study this knowledge seriously, how powerful it should be. Liu Changyun looked at Zhao Zhongyao again and said.

Without waiting for Zhao Zhongyao to say anything, Liu Tianming interjected at this time and said: "Minister Liu, is Zhao Zhongyao originally an all-rounder? There is nothing he doesn't know." I've been with him for two or three years. In my opinion, Zhao Zhongyao's knowledge is far above us. Don't talk about us laymen. Even some military experts don't know as much as Zhao Zhongyao. Liu Tianming can be regarded as deeply touched. He and Zhao Zhongyao have been together for two or three years. No matter what kind of advanced weapons are studied, as long as Zhao Zhongyao develops them, they will definitely be faster and more advanced than others.

"No, before, the AK-47 assault rifle developed by Zhao Zhongyao was very advanced, and now it can be said that it occupies half of the sales of light weapons in the entire international market. Create a miracle in the sales of light weapons in history.

Now this model aircraft developed by Zhao Zhongyao is so advanced, I really feel strange. I don't understand Zhao Zhongyao, how did you do this, does your head look different from ours. ”

Liu Changyun listened to Liu Tianming's words, and recalled what he had heard about Zhao Zhongyao in the past two years. He also felt that Zhao Zhongyao was not only a genius, but also an all-rounder. There's nothing he doesn't understand.