Development of a PWM Precision Spraying Controller for Unmanned Aerial Vehicles

作     者：W.Clint Hoffmann Brad Fritz 

作者机构：USDA-ARSCollege Station 

出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)

年 卷 期：2010年第7卷第3期

页      面：276-283页

核心收录：

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 0836[工学-生物工程] 0702[理学-物理学] 

主　　题：PWM controller TL494 precision spraying UAV 

摘      要：This paper presents a new Pulse Width Modulation (PWM) controller for Unmanned Aerial Vehicle (UAV) precisionsprayer for agriculture using a TL494 fixed-frequency pulse width modulator together with a data acquisition board and developedsoftware. An UAV can be remotely controlled or flown autonomously by pre-programmed flight plans. The PWMcontroller was implemented through the guidance system on the UAV with control commands sent between the UAV helicopterand the ground control station via a wireless telemetry system. The PWM controller was tested and validated using LabVIEW8.2. Several analyses were performed in a laboratory to test different control signals. The results show that the PWM controllerhas promise as a higher precision technique for spray applications, which will improve efficiency of pesticide application,especially in crop production areas.