摘要
【目的】为满足自动取苗装置取苗过程中对穴盘苗钵体平稳夹持取出以及成功投放的设计要求,设计了一种适应于旱地钵苗自动移栽作业的夹苗器.【方法】利用解析法建立了夹苗器机构各主要结构参数之间的关系,并基于Matlab工具箱遗传算法对机构参数进行优化,根据参数优化结果建立了夹苗器虚拟样机模型,并通过ADAMS软件进行了仿真分析.【结果】遗传算法得到一组满足夹苗器作业要求的机构较优参数组合:lCD=44 mm,lBC=26 mm,lAB=18 mm,lOD=48 mm,lDE=246 mm,夹持角度θ为9.12°,小于穴口锥度α.仿真分析结果表明,夹苗器苗针可以灵活、准确实现开合动作,钵体所受苗针夹持力最大值为7.46 N,推苗环行程满足辅助推苗作业要求,夹苗器苗针夹持角度同样满足设计要求.仿真分析结果与理论分析结果相一致,相互验证了夹苗器理论分析与结构设计的合理性.【结论】进行了夹苗器样机试制和试验,试验结果表明该机构夹苗、持苗以及投苗动作稳定,满足设计需要.
【Objective】In order to meet the design requirements of the automatic seedling picking device for the smooth clamping and removal of the tray seedling bowl and successful delivery,a new type of seedling clamper is designed,which could be suitable for the automatic transplanting of seedlings in dry land.【Method】The relationship between the main structural parameters of the seedling clamper is established by the analytic method,and the parameters of the mechanism are optimized based on the genetic algorithm of Matlab toolbox.According to the optimization results,the virtual prototype model of the seedling clamper is established,and the simulation analysis is carried out by ADAMS software.【Result】The genetic algorithm obtains a group of better parameter combinations that meet the operation requirements of the seedling clamper:lCD=44 mm,lBC=26 mm,lAB=18 mm,lOD=48 mm,lDE=246 mm,and the clamping angleθis 9.12°,which is smaller than the hole taperα.The simulation analysis shows that the seedling clamper needle can achieve opening and closing action flexibly and accurately.The maximum clamping force of the seedling needle on the bowl body is 7.46 N,the stroke of the seedling pushing ring meets the requirements of the auxiliary seedling pushing operation,and the clamping angle of the seedling clamper needle also meets the design requirements.The simulation analysis results are consistent with the theoretical analysis,which mutually verify the rationality of the theoretical analysis and structural design of the seedling clamper.【Conclusion】The trial production and test of the prototype of the seedling clamper are carried out.The mechanism has stable action of seedling clamping,seedling holding and seedling throwing,which meets the design requirements.
作者
马晓晓
李华
任玲
李树峰
余思遥
MA Xiao-xiao;LI Hua;REN Ling;LI Shu-feng;YU Si-yao(College of Mechanical and Electrical Engineering,Shihezi University,Shihezi 832000,China;College of Mechanical and Electrical Engineering,Lingnan Normal University,Zhanjiang 524048,China;Institute of Technology,Xinjiang Institute of Science and Technology,Korla 841000,China)
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2020年第4期184-190,199,共8页
Journal of Gansu Agricultural University
基金
国家自然科学基金项目(51765059)
新疆生产建设兵团重大科技项目(2018AA010)
岭南师范学院自然科学类校级人才专项(ZL2020).
关键词
夹苗器
穴盘苗
钵体
遗传算法
参数优化
取苗试验
seedling clamper
plug seedling
seedling bowls
genetic algorithm
parameter optimization
test of picking seedling
