吊篮式自动移栽机动态喂苗影响因素分析

吊篮式自动移栽机在移栽过程中遇到移栽地面不平整或车速波动,易造成吊篮式自动移栽机平抛喂苗准确率降低。为此,通过对吊篮式自动移栽机平抛喂苗运动进行分析,提出了改变苗筒喂苗位置来解决此问题的方法。通过分析得出:当栽植器机架倾角逐渐大于-arctan(0.073vm)时,苗筒喂苗位置沿车速方向移动。当栽植器机架倾角逐渐小于-arctan(0.073vm)时,苗筒喂苗位置沿车速方向移动。当栽植器机架倾角恒定时,车速增大,苗筒喂苗位置需要沿车速的相反方向移动;车速度减小时,苗筒喂苗位置需要沿车速方向移动;最佳吊篮接苗位置不随车速的波动而发生改变。本研究结论为提高吊篮式自动移栽机喂苗准确性奠定理论基础。

Trajectory and Influencing Factors of Dynamic Dropping Seedling Analysis for Nacelle-type Automatic Transplanter

A new-style automatic transplanter that is composed of automatic feeding system and nacelle -type planting ap-paratus is designed.Artificial to pick seedling and feed seedling is replaced by automatic feeding system.Because of the seedlings that leave automatic feeding system will move to nacelle in horizontal projectile motion, decreasing of dropping seedling accuracy from field unevenness or speed changeable of automatic transplanter.In order to solve the low dropping seedling accuracy, the dropping seedling of the automatic transplanter is analyzed, and a scheme that changes dropping seedling location of guiding tube is proposed.The mathematics model of the shutter plate length is established, and the model is simulated by Matlab R2011b.when the change of planting apparatus traction frame angle and speed in the course of transplanting, the length variation of the shutter plate length is analyzed in this paper.According to the auto-matic transplanter which is composed of automatic feeding system and planting apparatus with nacelle, some parameters of the model is determined.The results show that when the traction frame of planting apparatus gradually more than -arctan (0.073vm), the dropping seedling edge of guiding tube shift to the speed direction;when the traction frame of planting apparatus gradually less than -arctan(0.073vm), the dropping seedling edge of guiding tube shift to the speed direction, and then moves at the speed direction;when the tilt angle of traction frame don ' t change, as the speed increases, the dropping seedling location of the guiding tube moves at the reverse speed direction, and as the speed slowly, the dropping seedling location of guiding tube moves at the speed direction, and the best dropping seedling position will not change as only the speed changes.The movement mechanism analysis will provide theoretical foundation for improving the dropping seedling reliability of the nacelle-type automatic transplanter.