Integrated electric actuator for unmanned aerial vehicle

Abstract

The invention discloses an integrated electric actuator for an unmanned aerial vehicle, which is specifically applied to the field of control surface control for unmanned aerial vehicles. According to the scheme, a brushless direct-current motor is used as a power source, and due to the scheme of serially connecting the brushless direct-current motor, a planetary reducer and a hollow angular displacement sensor, the actuator is compact in structure, and the spatial dimensions thereof are reduced, the working life thereof is prolonged, and the reliability thereof is improved; a shell of the actuator adopts a sealed structure design, and is high in dustproof and waterproof capacities, and adaptive to bad working environments; a control driver adopts the control strategy of a position and two-stage current limiting, a current-limiting ring is mainly used for limiting an excessive current occurring in a system under abnormal conditions, and protecting the safety of the electric actuator and the unmanned aerial vehicle; and with regard to a square-wave position angle instruction, real-time acquisition for the angle instruction is realized by means of interrupt capture, and the accuracy of acquisition for the angle instruction is improved by adopting the control strategy of angle amplitude-limiting filtering and instruction compensation, therefore, the accuracy of the flight attitude of the unmanned aerial vehicle can be greatly improved, and can achieve 0.1 degrees.

Description

technical field [0001] The invention relates to an integrated electric steering gear for an unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicle control surface control. Background technique [0002] With the rapid development of unmanned aerial vehicles, in order to meet the increasing reliability and light weight of unmanned aerial vehicles and other technical requirements, higher requirements are put forward for the electric steering gear, which is an important part of unmanned aerial vehicles. As the actuator of the UAV control system, the electric steering gear is one of the key executive components of the UAV. It is mainly used to control the angle of the rudder surface of the UAV to adjust the UAV's deflection, pitch, roll and other attitudes. Its working performance and reliability directly affect the control accuracy and working reliability of the UAV's flight attitude. [0003] A lot of research has been done on the UAV steering sys...

AI Technical Summary

Problems solved by technology

The traditional electric steering gear for drones uses DC brushed motors as the power source, and multi-stage pinions as the transmission deceleration mechanism, which has small load moment, short life cycle, poor environmental adaptability, and poor control accuracy (between 0.15° and 0.2° Between) and other shortcomings, can not meet the requirements of rapidity and high reliability

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