How to improve the wind resistance, flight speed and endurance of UAV has always been an important issue for UAV companies. At present, there are three main ways to improve the performance of UAVs in the market. One is to use more advanced UAV manufacturing materials; Second, the optimization control algorithm and other software level technology; The third is to optimize the structure design of UAV.

Aeronext, a UAV company, has independently developed 4D gravity technology, which is committed to improving the performance of UAV fuselage through the reform of UAV framework design. Aeronext, from Japan, was established in April 2017. In May 2019, it established a new subsidiary, Tianci Technology (Shenzhen) Co., Ltd., in Shenzhen to explore the Chinese market.

Aeronext found that in most traditional UAV frame structures, the propeller part responsible for flight movement and the payload part are connected together, that is to say, when the flight part tilts, the payload part tilts accordingly. 4D gravity technology developed by aeronext can change this phenomenon.

The technical solution separates the flight part and the carrying part of the UAV, and then combines them together through the PTZ to form a “through universal joint” structure, so that the flight part and the carrying part can be displaced independently of each other, so that the carrying part of the UAV will not tilt even if the flight part is tilted“ The core of our technology is to control the center of gravity of the UAV when it moves. The so-called “4D” is to add the fourth latitude of “center of gravity” outside the three-dimensional space Aeronext CEO Tian Lu Guifu said.

Using 4D gravity technology to improve the fuselage performance of UAV

Fuselage structure of 4dgravity carrier

In the traditional structure of integrated UAV, when the UAV moves horizontally, accelerates or decelerates, or turns, the fuselage will tilt, and the center of gravity of the fuselage will also change. The change of the center of gravity position will cause the counter torque, which makes the forward direction rear motor load greater.

The UAV using 4D gravity technology can keep its center of gravity at a constant position even if it tilts forward in horizontal motion. Therefore, the load of the front and rear motors can be kept equal. So it can improve the stability of the body. So it can effectively solve the problems of wind resistance, reliability, flight time and flight speed of UAV. Specifically:

In terms of wind resistance, because the response of the tilt angle control of the aircraft is higher than that of the traditional UAV, its wind resistance will also become stronger. For example, the wind speed that a traditional UAV can resist is 5 m / s. After the 4D gravity technology transformation, the wind resistance will be improved to about 15 m / s. In terms of flight speed and endurance, the center of gravity can be kept unchanged by increasing the tilt angle, and the motor load fluctuation is small, so the speed can be increased by increasing the tilt angle; At the same time, it can also reduce the motor rating properly, so as to reduce the fuel consumption. In theory, 4dgravity could help the UAV increase its speed by 10% and endurance by 20%, Mr. Tian said. Based on the above characteristics and advantages, in the application level, aeronext has developed a prototype design that can be applied to VR video, logistics transportation, door-to-door delivery, narrow space inspection and measurement and other fields. At the same time, 4D gravity technology can also be directly applied to the existing unmanned aircraft. In addition, 4D gravity technology can also enable UAVs to complete flight postures that previously could not be achieved, such as close fitting and fit, Tian said.

As for the team, aeronext has a total of 11 members, including technical R & D and marketing personnel. The aeronext team hopes to further develop and promote 4dgravity technology with Chinese partners in the form of technology licensing. Previously, aeronext has established a strategic alliance with Shenzhen Industrial UAV manufacturer COBIT Aviation Technology Co., Ltd. and Shenzhen Zhihang UAV Co., Ltd. at the same time, it has also established a business alliance with Lihe Kechuang, a subsidiary of Tsinghua University in Shenzhen. Lihe Kechuang will support aeronext’s business strategy in China.

Foresight Industry Research Institute has predicted that the growth rate of global UAV market will reach 36% in the next three years, and that of China’s civil UAV market will reach 30% in the next three years. Tian Lu Guifu said that the reason why aeronext chose to land in China at the early stage of development is that it has a good eye on China’s relatively mature UAV market and relatively relaxed UAV R & D environment, as well as the leading position of Chinese UAV companies in the world market.

Tian Lu Guifu said frankly that the company is still in the primary stage of development, and product development and landing still need a lot of practical data to support. Next, the company plans to carry out a large number of flight test experiments with more partners to explore more new application scenarios, especially in areas that can not be solved by the existing airframe.

Editor in charge: GT

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