本文選題：液態(tài)施肥機　切入點：扎穴機構(gòu)　出處：《農(nóng)業(yè)機械學報》2017年05期 　論文類型：期刊論文

【摘要】：為更好地滿足斜置式扎穴機構(gòu)噴肥針的入出土軌跡姿態(tài)以及不損傷作物的農(nóng)藝要求,提出基于三次拉格朗日曲線擬合扎穴軌跡的逆向設計參數(shù)優(yōu)化方法,為得到理想的"杏胡形"扎穴軌跡,通過改變相對軌跡上若干型值點的坐標,控制噴肥針入出土姿態(tài)并建立噴肥針的運動學模型,采用Matlab GUI開發(fā)平臺,編寫了斜置式非規(guī)則齒輪行星輪系扎穴機構(gòu)的逆向設計與運動學分析仿真軟件,最終得到非規(guī)則齒輪行星輪系的節(jié)曲線、噴肥針的入出土角及噴肥針尖的速度隨行星架轉(zhuǎn)角的變化曲線。通過高速攝影試驗,觀察和分析了在扎穴機構(gòu)不同斜置角度下噴肥針尖相對運動軌跡的變化規(guī)律。試驗結(jié)果表明,隨著機構(gòu)斜置角度的增大,噴肥針軌跡橫向尺寸不變,縱向尺寸減小,扎穴軌跡段曲線逐漸向里收縮。在保證噴肥針扎入土壤一定深度情況下,噴肥針入出土角逐漸增大,隨著機構(gòu)斜置角度的增大,噴肥針軌跡的穴口寬度逐漸增大。
[Abstract]:In order to better meet the attitude of the injection needle unearthed and the agronomic requirements of the crops without damage, a reverse design parameter optimization method based on cubic Lagrangian curve fitting for the hole locus was proposed. In order to obtain the ideal trajectory of "apricot Hu shape", by changing the coordinates of several types of points on the relative locus, controlling the unearthed attitude of the injection needle and establishing the kinematics model of the needle, the platform of Matlab GUI is adopted. The inverse design and kinematics analysis simulation software of the skew irregular planetary gear train is developed, and finally the nodal curve of the irregular planetary gear train is obtained. The angle of release of the injection needle and the velocity of the tip of the spray needle follow the curve of the angle of rotation of the star frame. The changes of the relative trajectory of the tip of the sprayed needle are observed and analyzed at different oblique angles of the mechanism. The experimental results show that with the increase of the oblique angle of the mechanism, the lateral dimension of the needle trajectory is unchanged, and the longitudinal dimension decreases. The curve of the trajectory gradually shrinks inward. Under the condition that the injection needle penetrates into the soil at a certain depth, the angle of the injection needle into the unearthed soil increases gradually, and with the increase of the oblique angle of the mechanism, the width of the hole opening of the injection needle trajectory increases gradually.
【作者單位】： 東北農(nóng)業(yè)大學工程學院;北京農(nóng)業(yè)智能裝備技術研究中心;
【基金】：國家自然科學基金項目(51675093) 黑龍江省教育廳科學技術研究項目(12531025)
【分類號】：S224.21
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本文編號：1593465