Unmanned aerial vehicle parachute landing recovery method based on accurate measurement of wind field

Abstract

The present invention relates to an unmanned aerial vehicle parachute landing recovery method based on the accurate measurement of a wind field, and applied to the parachute landing fixed point recovery of medium-and-small sized unmanned aerial vehicles. The method comprises: prior to the landing of the unmanned aerial vehicle, an airborne sensor is employed to measure the track ground speed, the air flow air speed, the track slant angle, the yaw angle, the sideslip angle and the track azimuth of the unmanned aerial vehicle in real time; the size and the direction of the wind speed are calculated; the recovery motion points of the unmanned aerial vehicle are calculated according to the wind field information, and the flight course of the unmanned aerial vehicle is regulated; and after the unmanned aerial vehicle enters a recovery course by facing the wind to arrive an expected recovery point, the unmanned aerial vehicle emits a stop instruction, makes unpowered flight, emits a recovery instruction and opens a parachute in order, and the unmanned aerial vehicle slides slowing down and drifts close to an assigned point of fall. The unmanned aerial vehicle parachute landing recovery method based on the accurate measurement of the wind field is able to effectively improve the precision and the reliability of the parachute landing point recovery of the unmanned aerial vehicle on the basis of the measurement of the wind field.

Description

technical field [0001] The invention relates to the field of unmanned aerial vehicle parachute recovery, in particular to a method for unmanned aerial vehicle parachute recovery based on accurate measurement of wind field. technical background [0002] Parachute recovery is the main recovery method for small and medium-sized UAVs. After the UAV performs its reconnaissance mission, whether it can successfully land in a given area is particularly important. The current recovery methods are all controlled by the ground operator with the help of vision. The flight controller needs to have rich control experience, and estimate the landing point according to the magnitude and direction of the wind, and use this as a basis to complete the parking and parachute operation. However, due to the uncertainty of the operator's judgment, especially under the effect of wind disturbance, it is difficult to avoid the recovery failure of the drone due to the limitation of the landing site due ...

AI Technical Summary

Problems solved by technology

However, due to the uncertainty of the operator's judgment, especially under the effect of wind disturbance, it is difficult to avoid the recovery failure of the drone due to the limitation of the landing site due to the constraints of the recovery site.

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