蔬菜穴盘苗取苗机构分析与参数优化  

Analysis and Parameter Optimization for Vegetable Plug Seedling Pick-up Mechanism

作　　者：金鑫[1] 李树君[2] 杨学军 孙星 颜华 吴俭敏 

机构地区：[1]中国农业大学工学院,北京100083 [2]中国农业机械化科学研究院,北京100083 [3]现代农装科技股份有限公司,北京100083

出　　处：《农业机械学报》2013年第S1期1-6,13,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA10A501);国家重点基础研究发展计划(973计划)资助项目(2012CB723704)

摘　　要：针对现有蔬菜穴盘苗半自动移栽机作业时需人工取、喂苗,工作效率低的问题,设计了一种穴盘苗自动取苗机构。建立了该机构的运动和受力数学模型,分析了机构主要参数对运动和动力学特性的影响。提出了机构优化设计目标,并进行了参数优选分析,得出符合取苗轨迹要求的机构参数范围。在此基础上,对机构进行动力学分析,以机构支座所受力的波动最小为目标,获得了一组最佳组合。此组合下,机构不仅具有良好的取苗轨迹,满足移栽农艺要求,同时具备较好的动力学性能。During the vegetable transplanting for the existing vegetable semi-automatic transplanter,the plug seedlings picking and feeding are nearly dependent on manual work,so the work efficiency is very low.Aiming at this problem,a vegetable plug seedling automatic pick-up mechanism was designed.The motion and dynamic mathematical model were established.Moreover,the influences over the mechanism motion and dynamic characteristic by some important parameters were analyzed by using the parametric models.The design of optimization objective for automatic picking vegetable plug seedlings was proposed.And then,the range of mechanism parameter which met the requirements of the motion trajectory for plug seedling picking was obtained.In addition,the dynamic analysis for the pick-up mechanism was carried out based on the range.Meanwhile,taking the minimal force wave of mechanism bearing as optimization objective, the optimal parameter combination of pick-up mechanism was obtained.With these parameters,the plug seedling pick-up mechanism processed better the motion trajectory and better dynamic performance which met the demands of seedling picking.

关 键 词：穴盘苗 取苗机构 运动特性 动力学 参数优化 

分 类 号：S223.94[农业科学—农业机械化工程]