The internal design of the quadcopter, what theoretical basis is needed to make a quadrotor aircraft

The basis for controlling the attitude is the signal output by the attitude sensor. The attitude sensor includes at least an inclination sensor and an angular velocity sensor. Inclination sensors can be implemented indirectly using three-axis accelerometers.

Since it is an accelerometer, the signal it outputs represents the acceleration values of the current three axes, and if the aircraft remains stationary in space, the acceleration values can be obtained through simple conversion.

However, it is impossible for the aircraft to remain stationary in space at all times, for example, under the influence of crosswinds, the aircraft may deviate in a certain direction, so even if the aircraft does remain horizontal, the output of the three-axis accelerometer will still deviate from the center value, resulting in the misjudgment of the control core.

In order to avoid this situation, it is necessary to introduce a three-axis angular velocity sensor and an ultrasonic rangefinder to correct the acceleration in the x- and y-axis directions by using the angular velocity in the three axes, the acceleration in the z-axis direction and the real-time height change rate, so as to obtain the real inclination information. The output signal of the sensor is sent to the AD conversion circuit after analog amplification and analog filtering, and then converted into a digital signal and sent to the MCU (Microprocessor Control Unit), which carries out digital signal processing including but not limited to Kalman filtering, etc., and then obtains the control quantity according to the complete set of attitude control algorithms in the MCU, and sends it to the MCU specializing in motor control for real-time control of the motor, and at the same time to avoid the conflict and even contradiction of the results between the sensors.

If you want to start from scratch, if you want to play simply, just find an introductory book or search for tutorials on the Internet, and if you want to learn in detail, first learn about rotorcraft aerodynamics, DSP knowledge, rotorcraft structural mechanics, automatic control principles, motor control, and so on.

I used to see that some of the others said that they wanted to learn gears, is this useful? ......Don't wait......It's all said.

Follow-up Answer: The so-called learning gears is to learn the basics of mechanical design or mechanical design? First of all, I can't say enough, there is so much to learn.

Secondly, don't be greedy, learn one side first.

When you graduate with a Ph.D., it's good that you can learn the quadcopter drone almost well It is recommended that you take a look at this book: "Understanding Flight", and then have a basic concept of flying Look at this**.

If you want to draw drawings, just buy the thinnest AutoCAD and take a look.

If you can learn how to draw this vacation, understand the basic principles of flight, and probably make a model out, then you will be quite awesome

First of all, you have to learn the overall design, with the overall design, you have to learn the control theory, after learning the ruler control theory, you also have to learn to draw engineering drawings, learn hardware programming, and even learn to design and draw circuit boards, so that you can not let him not land, as well as track planning, terrain avoidance, image recognition, etc., etc., all of these, as long as you can master one aspect, you can make a living.

These things need the cooperation of many people!!

Summary. Dear, I'm glad to answer your questions. Based on the balance of the quadcopter design scheme, is a kind of use of four rotors as a flight engine to fly in the air, the rapid development of electronic technology quadcopter began to miniaturize, and integrated artificial intelligence, so that its development tends to UAV, intelligent robots.

<> balance-based quadcopter design.

Dear, I'm glad to answer your questions. Based on the balance of the quadcopter design scheme, is a fiber of several uses four rotors as a flight engine to fly in the air, the rapid development of electronic technology quadcopter began to miniaturize, and integrated artificial intelligence, so that the development of the vertical bureau tends to UAVs, intelligent robots. [big limb let saffron] <>

<> dear, hello, expand information for you: quadcopter, not only to achieve the best vertical lift flight performance, but also to a certain extent to reduce the difficulty of the design of the mechanical structure of the aircraft. The balance control system of the quadcopter consists of various types of inertial sensors.

In the production process, the center, symmetry and motor performance of the overall fuselage are required to be low, which is also the advantage of making quadcopters, and compared with fixed-wing aircraft, quadcopters also have the advantages of vertical take-off and landing, good maneuverability and easy maintenance. The quadcopter can complete specific flight tasks in a complex and dangerous environment, and can also be used to monitor traffic and environment, and can detect harmful gases at high altitudes. Enter the radiation zone to inspect the nuclear facility. <>

<>Big Red Book Poor Slippery] <>

Bats can combine the flapping of their wings with the flexibility of their wings to hover or continue to fly in the air. Based on this principle, a wingsuit flight suit was designed, made of nylon material with strength and strength. The most important part of the wingsuit is the stamped Hungry Celebration inflatable airbag.

When the Finchman Flyer lands in the air, the air quickly enters the airbag, filling the wingsuit with gas, which in turn creates buoyancy. The flyer relies on buoyancy to control the height and direction of flight by using the movement of the body in the air. In addition to this, the flyer wears a special helmet.

This helmet is equipped with 2 GPS trackers, which can tell the speed and glide rate of the pilot at the first time through the small screen in the lower right corner of the glasses.

Wingsuit flight, also known as close-range sky gliding, refers to the movement of a flyer wearing a wingsuit jumping from a high place such as a tall building, a tower, a bridge, a cliff, and a high place to carry out unpowered flight in the air. In general, the landing altitude of the flyer is limited, and it is necessary to adjust the posture and open the parachute bag in a short time. As a result, wingsuit flying is extremely challenging and adventurous, and is known as "the world's best extreme sport".

Wingsuit flight, also known as close-range sky gliding, refers to the athlete wearing a flight suit and parachute equipment with wings, jumping down from an airplane, a hot air balloon, a cliff, a high-rise building and other high places, the pilot uses body movements to control the direction of gliding, and uses the body to carry out the movement of unpowered air flight, and at the height of reaching the safety limit, the athlete opens the parachute and lands smoothly.

According to the different starting points, wingsuit flight can be divided into high-altitude wingsuit flight and low-altitude wingsuit flight. Wingsuit high-altitude flight generally refers to high-altitude wingsuit flight parachute jumping from the aircraft, and the take-off and landing methods are basically the same as high-altitude skydiving, and the pilot wears a wingsuit and needs to carry high-altitude skydiving equipment. Wingsuit low-altitude flight was developed from low-altitude skydiving.

Low-altitude fixed-point skydiving is mostly called extreme skydiving in China, also known as "back dead jumping". Low-altitude BASE jumping is a parachute jump from a fixed object as opposed to airplane skydiving. The fixed object can be a building, a TV tower, a chimney, a bridge, a power tower, a cliff, a cable car, a dam, or anything else that is tall enough.

1.Fashionable and exquisite, exquisite workmanship, Seraphi has a fashionable and exquisite appearance, exquisite workmanship, and also has a blind smile integrated with its own research and development of the flight power system, and is equipped with a professional radio remote control system.

2.Stable design with easy integration and easy maintenance Seraphi has integrated and stable design that is easy to make and maintain, and all flight parameters and functions have been set and debugged before leaving the factory, with a fast flight mode that requires no installation and no commissioning. Seraphi is easy to carry and can be used with a GoPro or other miniature camera to record in the air**.

3.Freely switch between multiple flight modes.

Seraphi has a built-in flight control system with a variety of flight modes, and you can intelligently switch in real time according to different flight needs and different flight environments to achieve a different flight experience.

4.Flexible Direction Control Seraphi has its own R&D flight control system, which provides flexible direction control. During the normal flight, it can be flexibly carried out according to the needs of the player.

5.With fail-safe return-to-home Seraphi has the failsafe protection function of its self-developed multi-rotor flight control system. When there is no contact between the aircraft and the remote controller, the flight control system will activate the failaway protection function, and automatically trigger the automatic return home safe landing loss function.

6.Eye-catching LED indicator.

The Seraphi is equipped with LED lights under each rotor, which can clearly distinguish the front and rear direction of the aircraft through the guidance of the indicators.

8.Dual battery compartment setting, long flight time Seraphi can be equipped with two 3S lithium batteries, and the flight time of one cruise can reach 20 30 minutes, so that you can enjoy the fun of flying.

We've done it with quadcopters, but I'm not very sure how to do it, it's a teamwork.