摘要
针对栽植部件与土壤接触条件下的运动学特征进行研究。以吊篮式移栽机的栽植机构为例,应用ADAMS软件建立虚拟样机,在对鸭嘴与土壤的接触过程分析的基础上,建立鸭嘴与土壤的接触模型,对栽植机构作业过程进行仿真模拟,分析其运动学特征。对比分析理想条件下线速度与平动速度的速比λ<1、λ=1、λ>1三种不同速比取值时鸭嘴的轨迹和速度曲线图,以及接触条件下三种速比取值时的鸭嘴轨迹和速度曲线图。结果表明,在考虑鸭嘴与土壤存在接触的情况下,吊篮式移栽机鸭嘴的运动轨迹、鸭嘴最低点处的速度曲线图均与理想状态下存在较大差异。分析差异产生的原因,是因为接触条件下存在额外的转动作用,给出了在接触条件下,吊篮式移栽机满足零速投种要求的速比范围λ≥0.68。
It researched in kinematic characteristics of planting part under the contact condition between dibble and soil.Utilizing the ADAMS software,a virtual prototype is built for planting mechanism of dibble-type transplanter. Based on the analysis of the contact process between dibble and soil,a simulation of planting process is done to analyze the planting mechanism kinematic characteristics. Results show that there is a big difference about dibble trajectories and velocities between ideal condition and contact condition,and the reasons of the difference are discussed. Under the contact condition,the speed ratio range λ ≥0.68 is essential to satisfy zero-speed planting demand. It provides a theoretical basis for the improvement and further optimization in the actual application of dibble-type transplanter.
出处
《机械设计与制造》
北大核心
2016年第1期246-249,共4页
Machinery Design & Manufacture
基金
国家科技支撑计划项目(2012BAD42B03)
