Development of a PWM Precision Spraying Controller for Unmanned Aerial Vehicles


This paper presents a new Pulse Width Modulation (PWM) controller for Unmanned Aerial Vehicle (UAV) precision sprayer for agriculture using a TL494 fixed-frequency pulse width modulator together with a data acquisition board and developed software. An UAV can be remotely controlled or flown autonomously by pre-programmed flight plans. The PWM controller was implemented through the guidance system on the UAV with control commands sent between the UAV helicopter and the ground control station via a wireless telemetry system. The PWM controller was tested and validated using LabVIEW 8.2. Several analyses were performed in a laboratory to test different control signals. The results show that the PWM controller has promise as a higher precision technique for spray applications, which will improve efficiency of pesticide application, especially in crop production areas.

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@inproceedings{Lan2010DevelopmentOA, title={Development of a PWM Precision Spraying Controller for Unmanned Aerial Vehicles}, author={Yubin Lan and Hang Zhu and Wenfu Wu and W. Clint Hoffmann and Yanbo Huang and Xinyu Xue and Jian Liang and Brad K. Fritz}, year={2010} }