平移式喷灌机同步行走控制雨量分布仿真

通过单喷头雨量分布室内试验,获取雨量分布信息及出水轨迹信息.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均匀性,实现前进速度的最优化.分析喷头配置间距和喷头高度对横向灌溉均匀度的影响,优化平移式喷灌机喷头配置.在进行单喷头雨量分布室内试验的基础上,建立了雨量分布仿真模型.仿真结果和现场试验表明：改变驱动电机的频率可以实现纵向的变量灌溉,横向的灌溉均匀度取决于喷头的型号和压力,田间与仿真试验得到的水分分布数据最大相对误差为3.39%,证明仿真模型的可信度.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.

Simulation of water spraying lateral distribution in synchronously controlled moving linear-move irrigators

Rainfall distribution and water trajectory information was acquired through a single nozzle indoor test.A three-dimensional model of water motion was built by using the virtual reality technology,such as three-dimensional modeling and particle system etc.The optimal driving speed was rea-lized by studying the uniformity of water distribution across the lateral direction when a linear move irrigator is being moved ahead.The configuration of sprinklers was optimized by analyzed effects of the distance between adjacent two sprinklers and the height of sprinklers on the uniformity of lateral distribution of water.According to the water distributions measured by employing a single sprinkler,a water distribution model was built for a linear move irrigator.Field tests and simulation results showed that a variable vertical irrigation could be got by changing the frequency of the motors,while the uniformity of irrigation in the lateral direction depended on the type and pressure of sprinkler.The maximum relative error between field test and simulation is 3.39%,suggesting the simulation model is reliable.This outcome provides a means of investigating effect of irrigation and parameter optimization for a linear move irrigator.