SZ DJI Technology has filed a patent for a multi-rotor UAV control method. The method involves obtaining the power status of each rotor of the UAV and, if any rotor fails, controlling the UAV to enter a balance mode. In this mode, the UAV rotates at a certain angular velocity and maintains a limited displacement in the horizontal direction. GlobalData’s report on SZ DJI Technology gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on SZ DJI Technology, Precision imaging drones was a key innovation area identified from patents. SZ DJI Technology's grant share as of September 2023 was 37%. Grant share is based on the ratio of number of grants to total number of patents.
A patent for a method to control a multi-rotor uav in case of rotor power failure
A recently filed patent (Publication Number: US20230315124A1) describes a control method for a multi-rotor unmanned aerial vehicle (UAV) that allows the UAV to enter a balance mode in the event of a rotor power failure. The method involves obtaining the power statuses of the rotors and controlling the UAV to enter the balance mode if a power failure is detected. In the balance mode, the UAV rotates at an angular velocity greater than a first threshold and maintains a displacement in the horizontal direction that is less than a preset amount.
The patent also describes the process of controlling the UAV to enter the balance mode. This includes gradually reducing the angular velocity of the UAV to reach a balance-mode angular velocity. Additionally, the method involves obtaining control parameters and feedforward parameters of the UAV to redistribute lift forces to the rotors and enable the UAV to rotate at the desired angular velocity and maintain the desired displacement in the horizontal direction.
The patent further explains that the control apparatus for the multi-rotor UAV includes one or more controllers that are responsible for obtaining the power statuses of the rotors and controlling the UAV to enter the balance mode. The controllers can also control the angular velocity of the UAV to gradually increase to reach the balance-mode angular velocity.
Overall, this patent presents a control method and apparatus for a multi-rotor UAV that allows it to enter a balance mode in the event of a rotor power failure. This ensures that the UAV can continue to operate safely and maintain stability even with a malfunctioning rotor. The method involves obtaining power statuses, redistributing lift forces, and controlling the angular velocity and displacement of the UAV to achieve the desired balance mode. This innovation has the potential to enhance the safety and reliability of multi-rotor UAVs in various applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
