智能化农业装备学报（中英文）2026，Vol.7Issue(3)：85-97,13.DOI:10.12398/j.issn.2096-7217.2026.03.008
面向对辊式采收的朝天椒植株离散元参数标定与试验验证
Calibration and experimental verification of discrete element parameters of clustered pepper plants for double-roller harvesting
摘要
Abstract
To improve the accuracy and reliability of the Discrete Element Method(DEM)in the research on intelligent agricultural equipment for pepper harvesting and fruit damage mechanism,this paper takes"Zuanjiao No.1"clustered pepper as the research object.Based on the Hertz-Mindlin with Bonding V2 model in EDEM,a discrete element model of clustered pepper plants at the harvesting stage is established,which includes the pepper-carpopodium and carpopodium-branch structures.The intrinsic parameters and contact parameters of peppers,carpopodium,branches and other components were measured by direct measurement.The bonding parameters of pepper-carpopodium and carpopodium-branch were calibrated by response surface virtual calibration and stepwise approximation method.The calibrated results showed that the normal stiffness,normal ultimate stress and bonding radius of pepper-carpopodium were 6×10⁹ N/m³,5.446×10⁶ Pa and 0.668 mm,respectively,while those of carpopodium-branch were 7.520×10⁹ N/m³,5.020×10⁶ Pa and 0.906 mm,respectively.Finally,a double-roller clustered pepper harvester was built,and the established discrete element model was verified through field tests and simulation tests.The machine travel speed was set at 0.2 m/s and the stripping roller speed at 10 rad/s.The relative errors of the cleaning rate and carpopodium-containing rate of clustered pepper plants between simulation and field tests were 2.64%and 7.69%,respectively.The results show that the established discrete element simulation model of clustered pepper plants can well capture the fruit shedding characteristics during clustered pepper harvesting.The research results can provide theoretical support for the study of mechanical properties of key components during mechanical pepper harvesting,and also provide a fundamental model support for the structural optimization of harvesting equipment and the intelligent simulation of pepper mechanized harvesting.关键词
朝天椒/参数标定/离散元/对辊式/收获机/响应面Key words
clustered pepper/parameter calibration/discrete element method/double-roller/harvester/response surface分类
农业科技引用本文复制引用
刘超,刘凡一,谢守勇,蒲应俊,陈行政,海明..面向对辊式采收的朝天椒植株离散元参数标定与试验验证[J].智能化农业装备学报（中英文）,2026,7(3):85-97,13.基金项目
国家自然科学基金项目(32201668) （32201668）
重庆市技术创新与应用发展专项重点项目(cstc2021jscx-gksbX0019) National Natural Science Foundation of China(32201668) （cstc2021jscx-gksbX0019）
Chongqing Key Program of Technology Inno-vation and Application Development(cstc2021jscx-gksbX0019) （cstc2021jscx-gksbX0019）
