Publish Time: 2024-09-25 Origin: Site
The servo is a position (angle) servo drive, which is composed of electronic control and mechanical control parts. When the control signal is input, the electronic control part will adjust the rotation angle and speed of the DC motor output according to the instructions of the controller, and the mechanical part will be converted into the displacement of the control surface and the corresponding angle change. The output shaft of the servo is connected to the position feedback potentiometer, and the voltage signal of the output angle is fed back to the control circuit board through the potentiometer, so as to achieve closed-loop control.
The application of servos in UAVs is extensive and critical, mainly reflected in the following aspects:
(1) Heading and pitch control: The UAV servo is mainly used to control the heading and pitch during flight, similar to the steering gear in a car. By changing the position of the control surfaces (such as rudders and elevators) relative to the drone, the servos are able to produce the desired maneuvering effect, adjust the attitude of the airframe and control the direction of flight. This allows the drone to fly according to a predetermined route, achieving stable steering and lifting.
(2) Attitude adjustment: During the flight, the drone needs to constantly adjust its attitude to cope with various complex environments. By precisely controlling the angle change of the control surface, the servo helps the drone to achieve rapid attitude adjustment and ensure flight stability and safety.
As an actuator, the servo receives the electrical signal from the flight control system and accurately controls the opening and closing angles of the throttle and damper, so as to adjust the fuel supply and air intake, realize the precise control of engine thrust, and improve the flight performance and fuel efficiency of the aircraft.
This type of servo has very high requirements for accuracy, response speed, seismic resistance, high temperature resistance, anti-interference, etc. At present, DSpower has overcome these problems and has achieved mature applications and mass production.
(1) Gimbal rotation: In UAVs equipped with gimbals, the servos are also responsible for the rotation control of the gimbal. By controlling the horizontal and vertical rotation of the gimbal, the servo can realize the precise positioning of the camera and the adjustment of the shooting angle, providing high-quality images and videos for aerial photography, surveillance and other applications.
(2) Other actuators: In addition to the above applications, the servo can also be used to control other actuators of the drone, such as throwing devices, apron locking devices, etc. The realization of these functions depends on the high accuracy and reliability of the servo.
1. PWM servo: In small and medium-sized UAVs, PWM servos are widely used because of their good compatibility, strong explosiveness and simple control actions. The PWM servo is controlled by a pulse-width modulation signal, which has a fast response speed and high accuracy.
2. Bus servo: For large UAVs or UAVs that need to achieve complex actions, bus servos are a better choice. The bus servo uses serial communication, allowing multiple servos to be centrally controlled through a single main control board. They usually use magnetic encoders for position feedback, which has higher accuracy and longer life, and can provide feedback on a variety of data to better monitor and control the operating status of the drone.
The application of the servo in the field of UAVs has significant advantages, such as small size, light weight, simple structure, easy installation, etc. However, with the continuous development and popularization of UAV technology, higher requirements have been put forward for the precision, stability and reliability of the servo. Therefore, when selecting and using the servo, it is necessary to consider comprehensively according to the specific needs and working environment of the UAV to ensure the safe and stable operation of the UAV.
DSpower has developed a "W" series of servos for UAVs, with all-metal shells, super low temperature resistance of up to minus 55 °C, all of which are controlled by CAN bus, and the waterproof level is IPX7, which has the advantages of high precision, fast response, anti-vibration and anti-electromagnetic interference. We welcome your inquiries.
To sum up, the application of servos in the field of UAVs is not limited to basic functions such as flight control and attitude adjustment, but also involves many aspects such as performing complex actions and providing high-precision control. With the continuous progress of technology and the continuous expansion of application scenarios, the application prospect of servos in the field of UAVs will be broader.