Title :
Modification of a commercial PWM sprayer control system for precision farming application
Author :
Shahemabadi, Ali Rafiei ; Moayed, Majid Javid
Author_Institution :
Department of Electrical and Instrumentation Engineering, Putra University, Malaysia
Abstract :
The control system of a commercial sprayer was modified for variable-rate control of 12 individual solenoid shut off valves spaced 0.5 m apart on a sprayer boom. The variable-rate control system consisted of pulse width modulation (PWM) solenoids, a by pass control valve, and nozzle control system interfaced to a computer. An algorithm was developed to vary application rate across the booms with computing the best possible combinations of pulse width at the optimal boom through the computer control program for nozzles. This algorithm compensates inaccuracy of applying desired application rate due to pressure fluctuations across the booms.
Keywords :
Application software; Computer interfaces; Control systems; Fluctuations; Optimal control; Pulse width modulation; Solenoids; Space vector pulse width modulation; Spraying; Valves;
Conference_Titel :
Information Technology, 2008. ITSim 2008. International Symposium on
Conference_Location :
Kuala Lumpur, Malaysia
Print_ISBN :
978-1-4244-2327-9
Electronic_ISBN :
978-1-4244-2328-6
DOI :
10.1109/ITSIM.2008.4631862
