GNSS Crop Dusting Dispenser Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current aircraft guidance systems lack the precision to ensure even distribution of dry materials over predetermined areas while avoiding exclusion zones during crop dusting and aerial firefighting, due to factors like altitude, wind speed, and material moisture content.
Innovation Solution
A GNSS-based system integrated with a hydraulically-actuated dispenser, utilizing multiple antennas for accurate 3D positioning and attitude determination, and a graphical user interface to control the gate box of the dispenser, optimizing material distribution by adjusting the gate opening based on real-time data and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual operation of spreaders is used, then ease of operation is maintained, but manufacturing precision and distribution uniformity deteriorate
Solution Approach 1:
The system enables self-service automation where the spreader automatically adjusts gate box opening based on pre-programmed parameters and real-time feedback from GNSS positioning, eliminating the need for continuous manual adjustment while maintaining precise distribution uniformity across the treatment area
Solution Approach 2:
The system incorporates feedback mechanisms through GNSS positioning and altitude sensing that continuously monitor aircraft location and automatically adjust spreader operation accordingly, creating a closed-loop control system that maintains distribution precision without increasing operational complexity for the pilot
2Manufacturing precision
If electronic/hydraulic control of spreaders is implemented, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The system merges the electronic control system with the existing hydraulic spreader mechanism, integrating GNSS receivers, altitude sensors, and control algorithms into a unified package that works with the aircraft's current infrastructure, thereby improving precision without proportionally increasing overall system complexity
Solution Approach 2:
The control system is designed to be universal and multi-functional, serving both distribution precision control and basic navigation functions through integrated GNSS and altitude sensing, thereby achieving enhanced precision without requiring separate dedicated systems for each function
3Manufacturing precision
If fixed altitude flight is maintained, then ease of operation is preserved, but manufacturing precision deteriorates due to swath distortion
Solution Approach 1:
The system transitions from fixed altitude operation to dynamic altitude control where the aircraft automatically adjusts altitude based on pre-programmed profiles and real-time feedback from altitude sensors and GNSS positioning, enabling precise swath delivery while reducing flight control complexity through automation
Solution Approach 2:
The system employs preliminary action by pre-programming altitude profiles and distribution parameters before flight operations begin, allowing the automated control system to execute precise altitude adjustments without requiring real-time pilot intervention, thereby maintaining swath accuracy while preserving ease of operation
4Manufacturing precision
If material distribution is increased to ensure coverage, then quantity of substance improves, but loss of substance increases due to gaps and overlaps
Solution Approach 1:
The system uses feedback from GNSS positioning and altitude sensing to continuously monitor and adjust material distribution in real-time, ensuring consistent coverage uniformity by precisely controlling gate box opening based on actual aircraft position and speed, thereby eliminating the need to over-apply material and reducing waste from gaps and overlaps
Solution Approach 2:
The system dynamically changes distribution parameters such as gate box opening and material flow rate based on real-time flight conditions including altitude, speed, and position, optimizing coverage uniformity for each specific flight segment and preventing material waste that would result from static distribution settings
Data Source
AI summary
A GNSS system in combination with a hydraulically-actuated, airborne dispenser for a dry material crop dusting system to optimize the distribution of dry materials over a particular tract of land. A GNSS subsystem is included using at least one GNSS antenna and one GNSS receiver located on the aircraft. The aircraft is equipped with an electronic/hydraulic crop dusting subsystem connected to a GNSS CPU. The GNSS ranging signals received by the antennas are processed by a receiver and processor system for determining the vehicle's position and dynamic attitude in three dimensions (3D). The system is adapted for operation in a differential GNSS (DGNSS) mode utilizing a base station at a fixed location.