Abstract
Research shows that the accurate acquisition of flight parameters of the plant protection UAV and accurate evaluation of flight parameter quality have great significance for improving the effect and precision of spraying. In order to further improve the accuracy of the flight parameter quality evaluation of the plant protection UAV, this study conducted an evaluation and experiment of the flight parameter quality of the plant protection UAV using a laser tracker. The experimental results showed that the current plant protection UAV used the average altitude and speed of the onboard sensors to determine whether it reached the preset flight operation parameters, but this interpretation method could not accurately reflect the actual flight situation. Laser trackers could obtain more accurate flight parameters, especially instantaneous flight parameters. Compared with the laser tracker, the flight trajectory, altitude, and speed of the UAV reflected by onboard sensors were erroneous and tended to be smooth and stable. This method can obtain more accurate flight parameters, improve the accuracy of the flight parameter quality evaluation of the plant protection UAV, and provide data support and a reference for the precision spraying and performance improvement of the plant protection UAV.
Highlights
According to the 2020 China Plant Protection UAV Industry Development Report, the annual operating area of China’s plant protection UAVs exceeded 66.67 million hm2 [1,2]
Compared with the Leica AT960-LR absolute laser tracker, the flight trajectory, altitude consistency, and speed consistency output from the onboard sensors were erroneous, with a tendency to become smoother and more stable. This may be due to the fact that the onboard sensor sampling frequency (GPS: 10 Hz, millimeter wave (MMW): 100 Hz) is lower than that of the laser tracker sampling frequency (1000 Hz) or that the data are filtered and smoothed by the control algorithm of the plant protection UAV
In the flight speed, the deviation between the real-time data measured by the laser tracker and the set value was large, the maximum error was 187%, and the minimum error was 41%. (2) The maximum difference between the average flight altitude measured by onboard sensors and the laser tracker was only 4.11 mm
Summary
According to the 2020 China Plant Protection UAV Industry Development Report, the annual operating area of China’s plant protection UAVs exceeded 66.67 million hm2 [1,2]. In order to achieve precise application and improve the rate of utilization of droplets by the plant protection UAV [3,4,5,6], many scholars have conducted a series of explorations in terms of nozzle type [7,8], droplet size [9,10], spray pressure [11], etc. Tang et al [20] proposed a prediction method to predict spray drift and deposition under complex conditions They found that decreasing the flight altitude could improve droplet deposition, and increasing the flight altitude could reduce the deposition coefficient of variation. Our research group’s previous studies [21] found that flight altitude, flight speed, and the interaction between these two factors of an unmanned helicopter had a significant impact on the deposition concentration and uniformity
Published Version (Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.