Flight principle and hardware configuration of multi-rotor UAV II

Among them, M8NGPS adopts NEO-M8N chip, which can acquire and track different global navigation satellite systems at the same time: GPS, GLONASS or BEIDOU. Compared with 6M or 7M GPS with single mode, it has faster searching speed, more searching number and higher positioning accuracy. The number of search stars can reach 20, and HDOP (smaller GPS positioning accuracy factor means higher positioning accuracy) can reach below 0.5.

data link

Data link includes data transmission and image transmission. Data transmission means digital transmission, and data transmission terminals and ground control stations (such as notebooks or mobile phones) receive data information from the flight control system. Image transmission is image transmission. Generally, the delay of receiving images taken by airborne cameras or video cameras is tens of milliseconds. At present, there are also high-definition digital image transmission, which greatly improves the transmission rate and clarity.

frame

1. Overview: Frame refers to the fuselage frame of multi-rotor UAV, which is the flight carrier of the whole flight system. Generally, materials with high strength and light weight are used, such as carbon fiber composite, PA66+30GF and other materials. Carbon fiber composite is the most widely used material for civil multi-rotor UAV at present, which has the characteristics of high specific strength, good design, good structural dimensional stability, good fatigue fracture resistance, large-area integral molding, special electromagnetic properties and wave-absorbing stealth.

2. Rack wheelbase: The wheelbase of UAV refers to the distance between the central shafts of two motors located in the diagonal position, which is usually calculated in millimeters. The larger the wheelbase, the larger the overall size of UAV and the size of available paddles. For new players, it is advisable to choose a rack with a wheelbase less than or equal to 450 mm, and it is not advisable to choose a rack with a wheelbase too large.

3. Rack classification:

According to the material, it is often divided into nylon plastic frame, glass fiber frame and carbon fiber frame.

Nylon plastic frame. As the name implies, its material is plastic. The main feature is that it has certain strength and toughness and is cheap, and it can withstand bumps and falls, which is very suitable for beginners.