辣椒穴盘苗取苗栽植过程动力学分析与试验

doi:10.13733/j.jcam.issn.2095-5553.2023.07.006

摘要/Abstract

摘要： 辣椒穴盘苗夹茎式取苗过程中，取苗成功率与栽植直立度是评价栽植质量的重要指标。为探究影响栽植质量的主要因素，通过几何方法确定穴盘苗质心，将取苗运动轨迹分为取苗、持苗、栽植、回程四个阶段，分析穴盘苗质心在前三阶段的受力情况，建立穴盘苗质心在取苗点、脱盘点、栽植点三大关键点处的受力方程式，运用MatLab软件绘制质心在取苗-栽植运动过程中的受力关系曲线，分析关键点处穴盘苗茎秆的受力情况与穴盘苗姿态。确定影响栽植质量的主要因素为：穴盘苗质量、机构转速、夹持装置与穴盘苗茎秆之间的摩擦系数。通过控制变量法得到各因素的临界条件：穴盘苗质量临界值为8.34g，机构转速临界值为105.4r/min，夹持部件摩擦系数临界值为0.147。通过BoxBehnken响应曲面试验，得到三个因素最优参数组合：穴盘苗质量5.20g，机构转速68r/min，夹持部件与穴盘苗茎秆之间的摩擦系数为0.36，最优运移成功率91.04%。

关键词: 辣椒, 受力分析, 动力学模型, 临界条件, 参数优化

Abstract: The success rate of seedling selection and the erect degree of planting are important indicators to evaluate the planting quality in the process of pepper seedling selection. In order to explore the main factors affecting planting quality, the centroid of the hole tray seedlings was determined by the geometric method. The movement track of the hole tray seedlings was divided into four stages: seedling, picking, holding, and planting return. Force equations of the hole tray seedling centroid at the three key points of the seedling picking point were established to analyze the force of the hole tray seedlings centroid in the first three stages. MatLab was used to draw the force relation curve of the centroid in the process of seedling extraction and planting, and analyze the force situation and the position of the hole tray seedlings at key points. The results showed that the main factors affecting the planting quality were the hole tray seedling quality, the rotational speed of the mechanism, and the friction coefficient between clamping parts and the stem of the hole tray seedling. The critical conditions of each factor were obtained using the control variable method. The critical value of the hole tray seedling quality was 8.34 g. The critical speed of the mechanism was 105.4 r/min. The critical value of the friction coefficient of the clamping part was 0.147. According to the BoxBehnken response surface test, the optimal parameter combination of three factors were: the quality of the hole tray seedling was 5.20 g, the rotational speed of mechanism was 68 r/min, and the friction coefficient between clamping parts and the stem of hole tray seedling was 0.36. The optimal migration success rate was 91.04%.

Key words: pepper, force analysis, dynamical model, critical condition, parameter optimization

中图分类号:

S223.9

胡双燕, 胡敏娟, 张文毅, 葛迅一. 辣椒穴盘苗取苗栽植过程动力学分析与试验[J]. 中国农机化学报, 2023, 44(7): 40-47.

Hu Shuangyan, Hu Minjuan, Zhang Wenyi, Ge Xunyi. Dynamic analysis and experiment of seedling taking and planting process of pepper hole tray[J]. Journal of Chinese Agricultural Mechanization, 2023, 44(7): 40-47.

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