Agricultural UAV Flight Control for Wind-Driven Route Correction

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Solution Overview

Problem

Unmanned aerial vehicles (UAVs) used for agricultural tasks, such as spraying chemicals and imaging crops, face challenges in maintaining predetermined flight routes due to environmental changes caused by wind gusts and other factors, leading to potential delays or failure in completing work.

Innovation Solution

A flight control device equipped with a route information acquisition unit, position identification unit, environmental information acquisition unit, and flight control unit, which uses sensors to detect environmental changes and adjust the UAV's flight path to maintain stability and adherence to the predetermined route, even in changing conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the UAV flies autonomously along a predetermined route, then work efficiency is improved, but the UAV may deviate from the route due to wind gusts and environmental changes

Engineering Contradiction:
Improvework efficiencyVSAvoidroute adherence
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The flight control device continuously acquires actual position information during flight and compares it with the predetermined route. When deviation is detected, the system automatically generates correction commands to realign the UAV with the route, creating a closed-loop feedback control system that maintains route adherence despite environmental disturbances

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs autonomous route correction without operator intervention. The flight control device independently monitors position, detects deviations, calculates correction vectors, and executes corrective maneuvers, enabling the UAV to self-correct its trajectory and maintain productive operation

Inventive Principle:
Principle #25Self-service

2Reliability

If the UAV automatically corrects flight route deviations, then route adherence is improved, but device complexity increases

Engineering Contradiction:
Improveroute adherenceVSAvoidcontrol system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The flight control device integrates multiple functions into a single system: it serves as both the navigation computer and the correction actuator. The same control unit that plans the route also executes real-time position monitoring and generates correction commands, eliminating the need for separate correction hardware and reducing overall system complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system performs autonomous route correction without requiring additional specialized correction equipment. The existing flight control unit leverages its own computational resources and actuators to self-correct deviations, avoiding the need for separate correction systems and maintaining simplicity

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If the UAV maintains strict adherence to the predetermined route, then work quality is improved, but the ability to adapt to environmental changes is reduced

Engineering Contradiction:
Improvework qualityVSAvoidenvironmental adaptability
Core Design Contradiction:
Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The correction system dynamically adjusts the UAV's flight path in real-time based on actual position feedback and environmental conditions. Rather than following a rigid predetermined route, the system continuously modifies the trajectory to maintain optimal alignment with the work area, enabling adaptation to wind gusts and other environmental changes while preserving work quality

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system uses real-time position feedback to dynamically adjust the flight route. When environmental changes cause deviation, the feedback loop detects the discrepancy and automatically generates corrective commands, allowing the UAV to adapt to environmental conditions while maintaining precise work execution

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP3521158B1Flight control device, unmanned aerial vehicle, flight control method, and computer program
Publication Date: 2021.10.27 NEC CORP
  • EP3521158B1 patent drawingFigure 1
  • EP3521158B1 patent drawingFigure 2
  • EP3521158B1 patent drawingFigure 3

AI summary

This flight control device 10 comprises a route information acquisition unit 11, a position identification unit 12, an environmental information acquisition unit 13, and a flight control unit 14. The route information acquisition unit 11 acquires route information related to a route of an unmanned aerial vehicle that has been set in advance. The position identification unit 12 acquires positional information for identifying the position of the unmanned aerial vehicle 20, and identifies the position of the unmanned aerial vehicle 20 based on the acquired positional information. The environmental information acquisition unit 13 acquires environmental information of a farm field 30 from a detection device 40. The flight control unit 14 controls flight of the unmanned aerial vehicle 20 based on the route information acquired by the route information acquisition unit 11, the position of the unmanned aerial vehicle 20 identified by the position identification unit 12, and the environmental information acquired by the environmental information acquisition unit 13.