Design and physical model experiment of an attitude adjustment device for a crawler tractor in hilly and mountainous regions

Sun, Jinlong; Meng, Chong; Zhang, Yazhou; Chu, Guoping; Zhang, Yanjie; Yang, Fuzeng; Liu, Zhijie

doi:10.1016/j.inpa.2020.02.004

Cited by 15 publications

(10 citation statements)

References 1 publication

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“…Furthermore, combined with the characteristics of small plots of slope land, this study adopted an opposed distribution structure with a smaller adjustment range (Gao & Wang, 2006, Figure 5A). Considering the weight of the machine and the complexity of the operating environment (Sun et al, 2019;Sun et al, 2020), the wheel spacing adjustment of the maize harvest adopts a hydraulic control system to adjust (Figure 5B).…”

Section: Adjustment Mechanism and Hydraulic Control Systemmentioning

confidence: 99%

Study and Experiment on the Operational Adaptability of Slope Corn Harvesters

Geng

et al. 2022

Eng. Agríc.

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Studies on the operational adaptability of slope corn harvesters on hilly slopes are of great significance to improve the performance and safety of the whole machine, but there are few studies on this aspect at the present. Therefore, this paper takes a self-developed small sloping land crawler corn harvester as the object combined with the special topography of the hilly sloping land and the technology adopted by the machine to make a mathematical analysis of its operational adaptability on the sloping land. Through the field test, the forward speed of the corn harvester, track wheel spacing and slope angle are used as the test factors, and the harvest loss rate of the corn ear is used as the assessment index to carry out the orthogonal test on the slope land. The analysis of the results based on the Design-expert response surface was completed. The results show that the ear loss rate of the experiment under different conditions is less than 5% of the national standard. The corn harvester has good adaptability to sloped land, which can realize the mechanized operation of corn on the hilly and sloped land, and has good agricultural production application value.

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Section: Adjustment Mechanism and Hydraulic Control Systemmentioning

confidence: 99%

Study and Experiment on the Operational Adaptability of Slope Corn Harvesters

Geng

et al. 2022

Eng. Agríc.

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“…Hence, from this equation, we can derive the formula to calculate the maximum value of the angle of gradient for the tractor unit by putting У f = 0 in equation (10). That is, the angle α cv will be: Equation 11is more exact than equation (6).…”

Section: Fig 2 Design Diagram Of the Tractor With A Plough Travellimentioning

confidence: 99%

“…To determine the critical value of the angle α cv , let us equate the formula (10) to zero and substitute the formula for α r from (17) to it. Then, by putting У f = 0, P j = 0 the formula can be written as follows:…”

Section: Fig 2 Design Diagram Of the Tractor With A Plough Travellimentioning

confidence: 99%

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Mathematical model to calculate the critical value of the angle of gradient for a tractor-mounted tilther

et al. 2020

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The article is devoted to the search for a mathematical model convenient for practical calculations to determine the critical value of the angle of gradient for the tractor-mounted heavy tilther. It shows the existing mathematical model, which is then refined based on the stiffness of the elastic tractor wheels and their vertical reactions offset. Three methods of solving the resulting equations are analyzed, upon which the optimal one is chosen. As a result, a simple and convenient in practice mathematical model to determine the critical value of the angle of gradient for the tractor-mounted implement is obtained. The analysis of the calculation results showed that depending on the operating conditions and the weight of the tractor counterweight, the differences between the results calculated using the traditional and refined models can reach more than 4 degrees, which is very important to ensure the hill climbing safety.

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“…The attitude control of agricultural machinery has been developed by research on devices that maintain their level by controlling attitudes, such as the orbital combine and tractor three-point linkage (Kise & Zhang (2006); Sun et al (2020)). However, this device levels the body of the harvester with the ground, and is limited in its ability to accurately control the position of the cutting device.…”

Section: Introductionmentioning

confidence: 99%

A Sensor Fusion-based Cutting Device Attitude Control to Improve the Accuracy of Korean Cabbage Harvesting

Park¹,

Jun²,

Son³

2021

Preprint

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Korean cabbage harvesting lacks mechanization and depends on human power; thus, conducting research on Korean cabbage harvesters is of immense importance. Although these harvesters have been developed in various forms, they have not yet attained commercialization. Most Korean cabbage fields have slopes; thus there are several challenges, that can prevent accurate harvesting. Therefore, to address these challenges at the site, we adopt two cylinders in this study, develop a mechanism that enables attitude control of the cutting device, not driving platform body, to cope with slopes. By maintaining the level, angle, height of cutting, we can reduce loss and improve harvest performance. It is difficult to find examples where these mechanisms have been applied. For basic research, sensor fusion has been carried out based on the Kalman filter, which is commonly utilized for attitude control. The hydraulic cylinder was controlled using the data obtained for maintaining the attitude. Furthermore, field tests were conducted to validate this system, and the root mean square error (RMSE) was obtained and verified to quantitatively assess the presence or absence of attitude control. Therefore, the purpose of this study is to suggest a development direction for Korean cabbage harvesters via the proposed attitude control system.

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Design and physical model experiment of an attitude adjustment device for a crawler tractor in hilly and mountainous regions

Cited by 15 publications

References 1 publication

Study and Experiment on the Operational Adaptability of Slope Corn Harvesters

Study and Experiment on the Operational Adaptability of Slope Corn Harvesters

Mathematical model to calculate the critical value of the angle of gradient for a tractor-mounted tilther

A Sensor Fusion-based Cutting Device Attitude Control to Improve the Accuracy of Korean Cabbage Harvesting

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