农业机械学报2012，Vol.43Issue(4)：40-44,5.DOI:10.6041/j.issn.1000-1298.2012.04.009
PWM变量喷雾喷头流量模型
Nozzle Flow Model of PWM Variable-rate Spraying
摘要
Abstract
Nozzle flow model is indispensable in variable-rate spraying control based on pulse width modulation (PWM) technology, especially when nozzles are controlled independently. A variable-rate test platform which could control spraying pressure precisely and was easy to set PWM parameters was designed. The central composite orthogonal regression tests were completed by using the test platform, and the flow models of TEEJET AITXA nozzles of type 8002, 8003 and 8004 were obtained. The results of equation hypothesis test and test for lack of fit of flow models showed that the three flow models were agreeable. The maximum relative error of the TEEJET AITXA nozzle model of type 8002 was 7. 05% , while the minimum relative error was 0. 14% . For the type 8003, the maximum and minimum relative errors were 7. 27% and 0. 31% . And for the type 8004, the maximum and minimum relative errors were 7. 94% and 0. 71%. Nozzle flow model validation trials showed that the relative errors between model flow and actual flow were small.关键词
变量喷雾/脉宽调制/喷头流量模型Key words
Variable-rate spraying, Pulse width modulation, Nozzle flow model分类
农业科技引用本文复制引用
翟长远,王秀,密雅荣,范鹏飞,马永兵..PWM变量喷雾喷头流量模型[J].农业机械学报,2012,43(4):40-44,5.基金项目
"十二五"国家科技支撑计划资助项目(2011BAD20B06)、国家高技术研究发展计划(863计划)资助项目(2012AA101904-6)、陕西省科技计划资助项目(2011K02-05)和西安市科技创新支撑计划资助项目(NC1122(1)) （2011BAD20B06）
