Design of an Electronically Controlled Fertilization System for an Air-Assisted Side-Deep Fertilization Machine

Qingzhen Zhu, Zhihao Zhu, Hengyuan Zhang, Yuanyuan Gao and Liping Chen ()
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Qingzhen Zhu: School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
Zhihao Zhu: School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
Hengyuan Zhang: School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
Yuanyuan Gao: School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
Liping Chen: School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2023, vol. 13, issue 12, 1-12

Abstract: The traditional air-assisted side-deep fertilization device has some problems, such as inaccurate control system parameters and poor precision in variable fertilization. It seriously affects the application and popularization of the device. Aiming at the above problems, this paper wanted to realize the precise fertilizer discharge control of an air-assisted side-deep fertilization device. This paper designs an electronically controlled fertilization system based on a PID controller from the past. The system model was constructed in MATLAB, and the mathematical model and transfer function model of a stepper motor, the mathematical model of fertilizer discharge, and the stepper motor rotational speed were established too. In order to improve the accuracy of precise fertilizer discharge control system parameters, the system parameters were optimized based on the particle swarm optimization algorithm and the control system tuner toolbox. We had established a validation test platform to test the performance of a precise fertilizer discharge control system. In the actual experiment, the maximum stability coefficient of variation was 0.91% at the target fertilizer discharge mass level of 350 g/min, and the maximum error of fertilizer discharge was 4.14% at 550 g/min of the target fertilizer discharge mass level. By analyzing the test results of the precise fertilizer discharge control system, the new precise fertilizer discharge control system had good fertilizer discharge stability and could also meet the technical specification for quality evaluation of fertilization machinery (NY/T 1003-2006). This research can improve the fertilizer discharge accuracy of the air-assisted side-deep fertilization control system.

Keywords: control system; PID; parameter optimization; side-deep fertilization; precision fertilization (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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