Authors

Abstract

This study is based on the discrete element method to design a tracked precision solid particle pesticide applicator and establish a coupling model between the pesticide application device and particle swarm EDEM. Simulation shows that particle characteristics significantly affect the uniformity of pesticide application. The coefficients of variation for particles 1, 2, and 3 are 4.25%, 4.63%, and 5.57%, respectively, with relative deviations of 8.51%, 9.28%, and 11.33%. After response surface testing optimization, the measured coefficient of variation of the prototype was 8.25% and the relative deviation was 18.07%, both of which met industry standards.

Abstract in Chinese

针对现代农业对精准、高效、环保施药技术的需求，固体颗粒药剂因靶向性强、抗漂移性好、药效期长，成为植保作业技术发展的重要方向。本研究设计了一种适用于丘陵山地的履带式精准定量固体颗粒施药机，并基于离散元法（DEM）建立施药装置–颗粒群耦合作用的仿真模型，分析不同颗粒物料特性对施药均匀性的影响，并通过响应面试验优化作业参数。结果表明，作业速度对施药精度的影响最显著，低速时加大料口直径可提高均匀性，高速时优化施药角度有助于降低变异系数。现场试验显示，设计的施药机变异系数（8.25%）和相对偏差（18.07%）均符合行业标准，设备适应性和稳定性良好。研究成果可为丘陵地区施药装备研发提供理论依据，并推动精准农业发展。