ESTABLISHMENT AND CALIBRATION OF DISCRETE ELEMENT MODEL FOR COATED WHEAT SEED BASED ON STATIC AND DYNAMIC VERIFICATION TEST

基于静动态试验的包衣麦种离散元参数标定及优化

DOI : https://doi.org/10.35633/inmateh-74-32

Authors

(*) Xuejun ZHANG

College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi / China; Key Laboratory of Intelligent Agricultural Equipment of Xinjiang, Urumqi/ China

Ren GUO

College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi / China;

Zenglu SHI

College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi / China; Key Laboratory of Intelligent Agricultural Equipment of Xinjiang, Urumqi/ China

Jinshan YAN

College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi / China; Key Laboratory of Intelligent Agricultural Equipment of Xinjiang, Urumqi/ China

Shenghe BAI

National Key Laboratory of Agricultural Equipment Technology, Chinese Academy of Agricultural Mechanization Sciences Group Co., Ltd., Beijing / China

Longfei YANG

College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi / China;

Yongliang YU

Xinjiang Tiancheng Agricultural Equipment Manufacturing Co, Tiemenguan / China

Duijin WANG

Xinjiang Tiancheng Agricultural Equipment Manufacturing Co, Tiemenguan / China

(*) Corresponding authors:

tuec@163.com |

Xuejun ZHANG

Abstract

This study calibrated discrete element parameters for coated wheat seeds through static and dynamic validation tests. Using physical experiments, key parameters were measured, and a discrete element model was created. Optimal parameters were identified via the Plackett-Burman test, steepest ascent experiment, and Box-Behnken design. Validation tests showed that the relative error between the simulated and actual angle of repose was 1.31%, and the relative error in seeding uniformity and seed displacement uniformity was less than 5%. These findings provide theoretical support for optimizing seed dispenser structures in precision wheat sowing.

Abstract in Chinese

本研究基于静动态试验对包衣麦种参数进行离散元标定，采用物理试验测得其物性参数和接触参数，建立离散元模型；采用PLACKETT-BURMAN试验，最陡爬坡实验、BOX-BEHNKEN试验获得显著影响因素的最佳参数组合，通过静态圆筒提升实验与动态排种器台架试验进行验证。结果表明，仿真休止角与实际休止角相对误差为1.31%，播量一致性和排种均匀性的变异系数相对误差平均值均低于5%，可为麦种精量化播种中排种器结构优化提供理论参考。

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