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排灌机械工程学报
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排灌机械工程学报  0, Vol. Issue (): 21-    DOI:
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同步行走平移喷灌机变量灌溉仿真
苑严伟1, 2,张小超1,吴才聪2,董鑫1
(1.中国农业机械化科学研究院土壤植物机器系统技术国家重点实验室,北京 100083;2. 北京大学遥感与地理信息系统研究所,北京 100871)
Variable Rate Irrigation Simulation of Synchronous Driving Linear Move Irrigator
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摘要 同步行走的平移式喷灌机能够通过控制行走速度实现前进方向的变量灌溉。为提高其灌溉效果,研究不同控制策略条件下平移式喷灌机前进方向和横向灌溉雨量分布特征。通过室内试验研究单喷头的出水特性,获取不同压力下的雨量分布信息及水珠从喷头喷出后的喷洒轨迹。利用三维建模、粒子系统等虚拟现实技术,结合实际的雨量分布数据及出水轨迹,模拟出喷头喷洒水雾的三维动态模型。研究喷灌机各跨同步行走时前进方向喷灌雨量分布与行走速度的关系。分析喷头配置间距和喷头高度对横向灌溉均匀度的影响,优化平移式喷灌机的喷头配置。仿真结果和现场试验表明:改变驱动电机的频率可以实现喷灌机前进方向的变量灌溉,横向的灌溉均匀度取决于喷头的型号和压力。仿真与田间试验得到的水分分布数据最大相对误差为3.39%,仿真结果能较真实的模拟实际试验。本文为平移式喷灌机同步行走控制条件下变量控制对灌溉效果的影响和优化研究提供了手段。
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关键词平移式喷灌机    变量灌溉    虚拟现实    雨量分布    最优化方法     
Abstract: Synchronous Driving Linear Move Irrigator can irrigate in variable rate by change driving speed. To improve the irrigation effect, studied water distribution information in both longitudinal and transverse directions while the linear move irrigator was drove synchronously ahead with different control method. With three-dimensional models and particle system, together with water distribution and water flow trace, three-dimensional dynamic model of water flow was built. Studied irrigation uniformity in longitudinal direction in different speed, analyzed the effect of sprinkler space and height to lateral irrigation uniformity, and optimized the configuration of sprinklers. Simulation results and field tests showed that: change the frequency of the drive motor can achieve vertical variable irrigation in driving direction, landscape direction irrigation uniformity depend on type and pressure of sprinkler. The maximum relative error between field and simulation of 3.39% shows that the simulation can reflex filed test. This study provides methods for linear move irrigator optimizing irrigation effect.
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引用本文:   
. 同步行走平移喷灌机变量灌溉仿真[J]. 排灌机械工程学报, 0, (): 21-.
. Variable Rate Irrigation Simulation of Synchronous Driving Linear Move Irrigator[J]. Journal of Drainage and Irrigation Machinery Engin, 0, (): 21-.
 
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