A multi-rotor aircraft refers to an aircraft equipped with multiple rotors (or electric propellers). Compared with traditional fixed-wing aircraft and single-rotor helicopters, multi-rotor aircraft have the advantages of simple structure, flexible control, and high stability. Therefore, they are widely used in many fields such as unmanned aerial vehicles (UAVs), aerial photography, logistics distribution, and agricultural spraying. The innovative design and high-efficiency performance of multi-rotor aircraft make them an important part of modern aviation technology, especially in today's rapid development of the drone industry, and their application scenarios are becoming more and more extensive.

◆ Basic Structure

Multi-rotor aircraft usually consists of a fuselage, multiple rotors, electric motors, power systems, flight control systems, etc. Common multi-rotor aircraft include quad-rotors (quadcopter drones), hexacopters (six-axis drones), and octo-rotors (eight-axis drones). The rotor configuration is designed according to the needs and stability requirements of the aircraft.

◆ Working Principle

Multirotor aircraft generates lift through the thrust of multiple rotors, and uses the speed adjustment of each rotor to achieve attitude control and directional control of flight. The aircraft precisely controls the flight movements such as lifting, moving forward, backward, and rotating by changing the speed of each rotor. For example, in a quadcopter, the speed difference between the front and rear rotors and the left and right rotors determines the direction and stability of the aircraft.
Multirotor aircraft uses a unique "omnidirectional force control" method, that is, adjusting the speed of multiple rotors at the same time to change the direction of movement of the aircraft, so that it has higher stability and control accuracy during flight.

◆ Features

High stability and flexibility
Multirotor aircraft can effectively improve flight stability through the distribution of multiple rotors. The thrust of each rotor can be adjusted independently to ensure that the aircraft is not easy to lose control when performing complex flight missions. In addition, multiple rotors provide a redundant design, so that even if some rotors fail, the aircraft can still maintain high stability and return to a safe area.

Vertical take-off and landing capability
Multirotor aircraft have typical vertical take-off and landing (VTOL) capabilities, and can take off and land vertically without a runway. This allows them to be used flexibly in environments with limited space or uneven ground, and are widely used in tasks such as urban air travel, emergency rescue, and post-disaster reconstruction.

Efficient control and intelligent system
The flight control system of multirotor aircraft usually uses advanced sensor technology, GPS positioning, gyroscopes, accelerometers and other equipment to monitor the flight status in real time and provide precise flight control and self-stabilization functions. The intelligent flight system can realize multiple functions such as automatic flight, path planning, obstacle avoidance, and fixed-point hovering, which greatly improves the operability and safety of the aircraft.

Low noise and environmental protection
Multirotor aircraft use electric motors as power sources, which have the advantages of low noise and low emissions compared to traditional internal combustion engine aircraft. This allows them to be used in cities or densely populated areas, especially in the fields of air logistics distribution and urban air travel, which can reduce noise pollution and meet modern environmental protection requirements.

◆ FAQ

How to maintain a drone?
Maintaining a drone requires regular inspection and care. First, make sure the battery stays charged and avoid overcharging or discharging. Clean the fuselage, propellers, and camera regularly to remove dust and debris. Check the propellers for cracks or damage and replace them in time. Calibrate the gyroscope and GPS before flight to ensure stability. After flight, check the battery, motor, and control system to confirm that there are no abnormalities. Update the firmware regularly to ensure the latest performance of the device. In addition, avoid flying in adverse weather conditions to extend the life of the drone.

What is the safe operation guide for Drone?
First, make sure you are familiar with local laws and regulations before flying, and avoid flying in no-fly zones. Maintain line of sight during flight to avoid loss of control or signal. Check the status of components such as batteries, motors, propellers, etc. to ensure that the equipment is in good condition. Avoid strong winds, heavy rain or thunderstorms during flight to ensure stable flight. Comply with flight altitude restrictions to avoid collisions with buildings or people. Calibrate GPS and gyroscopes regularly to ensure accurate navigation. Finally, shut down the drone in time and store it properly after the flight.

How to extend the life of drone batteries?
The key to extending the life of drone batteries is to avoid overcharging and over-discharging. Before each charge, make sure the battery is between 20%-80% and do not wait until the battery is completely exhausted. Use the original charger and avoid using non-compliant charging equipment. Avoid flying in extreme temperatures, especially in overheated or cold environments, as high temperatures will accelerate battery aging. Use the battery regularly and avoid leaving it for too long when not in use. Charge it promptly after the flight to avoid the battery being in a low power state for a long time.

◆ Industry Applications

◆ Company Profile

Jiangsu Legend Intelligent Technology Co., Ltd. is a professional UAV industry application solution service provider. Relying on a complete service system and a good cooperation mechanism, it has become a deep partner of DJI industry applications.
Based on DJI industry application series products and relying on the East China UAV base, we build an ecosystem and six centers to provide customers with multi-dimensional and all-round solutions from top-level design to landing services. Help the fields of public security fire protection, power inspection, surveying and mapping infrastructure, urban management, etc., liberate productivity, reshape productivity, and build a link between technology and services.
Since its establishment, Jiangsu Legend Intelligent Technology Co., Ltd. has obtained various qualification certificates in the industry, and has become an industry leader through continuous in-depth exploration and exploration of the UAV field. It has established long-term strategic cooperation relationships with government and enterprise units such as Nantong Rudong Environmental Protection Bureau, Nantong Rugao Environmental Protection Bureau, Yancheng Funing State Grid, and Shandong Linyi Urban Management Center. It has continued to grow in solving practical problems, and gradually formed a win-win concept with cutting-edge technology as a technical means and personalized customization as a service purpose, to help the healthy and sustainable development of society. In the future, the company will continue to invest in research and development to increase its comprehensive competitiveness and actively deploy high-tech enterprises.