Development and performance evaluation of an electro-hydraulic downforce control system for planter row unit

Jing, Huirong; Zhang, Dongxing; Li, Yang; Fan, Chenlong; Zhao, Huihui; Wu, Hai-Liang; Pei, Jingchun; Cui, Tao

doi:10.1016/j.compag.2019.105073

Cited by 17 publications

(7 citation statements)

References 16 publications

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“…The described principle of the comprehensive adjustment of force and position is displayed in Figure 5. The integrated control of force and position in the electrocontrolled hydraulic system takes the tillage depth as the control signal [29,30] . Hence, the control coefficient x, defined as the proportion of force regulation in the comprehensive regulation of force position, is introduced.…”

Section: Comprehensive Regulation System Of Force and Positionmentioning

confidence: 99%

Design and experiment of fuzzy-PID based tillage depth control system for a self-propelled electric tiller

Xiao,

Ma,

Wang

et al. 2023

International Journal of Agricultural and Biological Engineering

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The research on the self-propelled electric tiller is vital for further improving the quality and efficiency of greenhouse rotary tillage operation, reducing the work intensity and operation risk of operators, and achieving environmentally friendly characteristics. Most of the existing self-propelled tillers rely on manual adjustment of the tillage depth. Moreover, the consistency and stability of the tillage depth are difficult to guarantee. In this study, the automatic control method of tillage depth of a self-propelled electric tiller is investigated. A method of applying the fuzzy PID (Proportional Integral Derivative) control method to the tillage depth adjustment system of a tiller is also proposed to realize automatic control. The system uses the real-time detection of the resistance sensor and angle sensor. The controller runs the electronically controlled hydraulic system to adjust the force and position comprehensively. The fuzzy control algorithm is used in the operation error control to realize the double-parameter control of the tillage depth. The simulation and experimental verification of the system are conducted. Results show that the control system applying fuzzy PID can improve the soil breaking rate by 3% in the operation process based on reducing the stability variation of tillage depth by 24%. The control strategy can reach the set value of tillage depth quickly and accurately. It can also meet the requirement of tillage depth consistency during the operation.

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Section: Comprehensive Regulation System Of Force and Positionmentioning

confidence: 99%

Design and experiment of fuzzy-PID based tillage depth control system for a self-propelled electric tiller

Xiao,

Ma,

Wang

et al. 2023

International Journal of Agricultural and Biological Engineering

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“…Jing et al installed force sensors on the furrow depth-adjusting member and used PID closed-loop control based on CAN communication. The field test results showed that the downforce via electronically controlled hydraulic control system improved the stability of sowing depth by 1.05~2.23% and the pass rate by 3.12~34.38% [85]. Li et al designed an active force sensor-based downforce regulator using a linear motor instead of a compression spring.…”

Section: System Downforce Adjustmentmentioning

confidence: 99%

Research Progress on the Development of the Planter Unit for Furrowing Control and the Depth Measurement Technology

Li,

He,

Wang

et al. 2023

Applied Sciences

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The article briefly describes the importance of furrowing depth stability for seed germination and growth under precision seeding conditions. By analyzing the application status of furrowing depth control technology of the planter globally, the research method, technical characteristics, and development of furrowing depth stability control technology are reviewed from three key aspects, namely, profiling adjustment device, furrowing depth detection technology, and automatic control system. In this paper, (1) two types of profiling adjustments, active and passive, are described based on the difference in the downforce adjustment method; (2) three furrowing depth detection methods are described based on different sensors; (3) and three ways of regulating the furrowing depth system are summarized based on the different ways of evaluating the stability of furrowing depth. In addition, the characteristics and application requirements of global furrow depth control technology are summarized. It is proposed that the future planter should be developed in the direction of automatic navigation, automatic monitoring and evaluation of seeding quality, variable seeding, high-speed seeding, and other intelligent precision seeding techniques. The summary and outlook of this paper aim to promote the overall development of furrowing depth control technology.

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“…At present, the general installation position of the downforce sensing device should be the depth adjustment lever, gauge wheel arm, or hinged position. For example, Lynn et al installed a gauge wheels downforce sensing device on the depth adjustment lever [25] . Jing et al [26] and Paul et al [27] replaced the depth adjustment lever connection pin with a downforce sensor.…”

Section: Introductionmentioning

confidence: 99%

Research and test of the measurement sensing device for the downforce of no-till planter row unit gauge wheels

Jiajie,

Liyi,

Ruifeng

et al. 2024

International Journal of Agricultural and Biological Engineering

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To effectively obtain the downforce of the gauge wheels in real time, mechanical models of the interaction among the ground, gauge wheels, gauge wheel arms, and depth adjustment lever were constructed. A measuring method was proposed for monitoring the downforce through a two-dimensional radial sensing device, and a corresponding prototype was designed. Through simulation analysis of the sensing device with ANSYS, a 45° angle was determined to exist between the strain gauge axis and the sensing device axis, and the Wheatstone bridging circuit of R1+R3−R5−R7 (R stands for resistance strain gauge, different figures represent the strain gauge number) and R2+R4−R6−R8 was adopted. According to performance and calibration tests for the sensing device, the maximum interaction effect between the X and Y axes was 2.52%, and the output signal was stable and consistent. The standard error of the slope of the fitting equation of the downforce calculation model is 0.008. According to the field test, the average downforce of the gauge wheels was 1148, 1017, 843, and 713 N, at different sowing speeds of 6, 8, 10, and 12 km/h, respectively. The coefficients of variation were 0.40, 0.41, 0.62, and 0.71, respectively. The results indicate that the downforce fluctuation of the gauge wheels became more severe with increasing planting speed. Both the strain simulation analysis and field test verified that the measurement method is accurate and reliable, the performance of the sensing device is stable, the measurement method and sensing device meet the application requirements and lay a foundation for the research of accurate and stable control of downforce of no-till planter.

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Development and performance evaluation of an electro-hydraulic downforce control system for planter row unit

Cited by 17 publications

References 16 publications

Design and experiment of fuzzy-PID based tillage depth control system for a self-propelled electric tiller

Design and experiment of fuzzy-PID based tillage depth control system for a self-propelled electric tiller

Research Progress on the Development of the Planter Unit for Furrowing Control and the Depth Measurement Technology

Research and test of the measurement sensing device for the downforce of no-till planter row unit gauge wheels

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