Analytical Description of Power Delivery Efficiency of Front Wheel Assist Tractor in Tillage Works

Shafaei, S.M.; Loghavi, M.; Kamgar, S.

doi:10.1007/s42853-021-00103-z

Cited by 14 publications

(3 citation statements)

References 131 publications

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“…However, PTO-driven implements have much lower draught than passive implements, leading to lower slippage values and greater slippage efficiency. The 𝜂 measured in this study was similar to that observed on a disk plough in Shafaei et al (2021), probably due to the flow of power through the PTO via engine-to-PTO transmission.…”

Section: Pag 22/39supporting

confidence: 80%

Correlation between power harrow energy demand and tilled soil aggregate dimensions

Varani

Mattetti

Molari

et al. 2023

Biosystems Engineering

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Section: Pag 22/39supporting

confidence: 80%

Correlation between power harrow energy demand and tilled soil aggregate dimensions

Varani

Mattetti

Molari

et al. 2023

Biosystems Engineering

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“…In domain of power loss of motion system, wheel slippage of the system has been frequently addressed by many previous researches (Farhadi et al, 2020;Gao et al, 2015;Onafeko, 1969;Taghavifar et al, 2015;Yong, 1973;Yong, 1976;Yong & Fattah, 1976;Yong & Foda, 1990;Yong et al, 1972Yong et al, , 1978Yong et al, , 1980Yong et al, , 1984 as effective parameter for motion power loss. Moreover, wheel motion resistance force of the system has been frequently mentioned by other previous researches (Chang & Cooper 1969;Shafaei et al, 2021aShafaei et al, , 2021bTaghavifar & Mardani, 2014a;Taghavifar et al, 2014) as another effective parameter for motion power loss. Therefore, the second term in the Equation (2) (power loss) can be expanded for motion system of the robot in following Equation (3).…”

Section: Theoretical Principlesmentioning

confidence: 97%

Characterization of motion power loss of off‐road wheeled robot in a slippery terrain

Shafaei

Mousazadeh

2022

Journal of Field Robotics

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For the first time in realm of power study of off‐road wheeled robots, this study deals with motion power loss due to slippage of robot wheels traversed on slippery terrain. For this purpose, effects of slippery terrain type (solid balls with diameter of 0.0127, 0.0254, and 0.0508 m), tire air pressure (20.68, 34.47, and 55.16 kPa), and robot forward speed (0.17, 0.33, and 0.5 m/s) on the power loss were characterized. Derived results proved that the increasing effect of slippery terrain type on the power loss was dominant (1.08 and 3.21 times) than that of robot forward speed and tire air pressure, respectively. Meanwhile, the increasing effect of robot forward speed on the power loss was prevailed (2.98 times) than that of tire air pressure. Hence, to minimize the power loss of the robot traversed on each type of slippery terrain, adjustment of robot forward speed should be considered as first priority. A comparison between motion power loss (43.60–249.40 W) and provided motion power for the robot (136–436.37 W) implies that 12.93–75.44% of provided motion power was wasted by slippage of the robot wheels on slippery terrains. Overall, the analytical results obtained in this study lead to open a new prospection for comprehending of the power loss trends of off‐road wheeled robots traversed on slippery terrains. As slippery terrain composed of solid balls, the results can be especially utilized for final phase of unloading robotic operations of catalyst handling procedure in process towers and reactors of oil, gas, petrochemical, and chemical industries.

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“…There are many other options to improve tractor traction performance. For example, the use of a four-wheel drive tractor instead of a rear-wheel drive tractor [9][10][11][12], tracks instead of wheels [13][14][15], dual wheels instead of single wheels, high-performance radial ply tires [16] instead of outdated bias ply tires, etc. Finally, tire inflation pressure [17][18][19][20] is a very important operation factor that positively affects tractor tractive performance and soil compaction due to an optimum ratio between the tire contact patch [21,22] and the tire rolling resistance.…”

Section: Introductionmentioning

confidence: 99%

Spike Device with Worm Gear Unit for Driving Wheels to Improve the Traction Performance of Compact Tractors on Grass Plots

Abrahám,

Majdan,

Kollárová

et al. 2024

Agriculture

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In general, energy loss reduction via the interaction of tires with the ground improves tractor traction performance when a drawbar pull is generated. This paper is examines the driving wheels with steel spikes for a tractor equipped with modern radial tires. An improved design of the spike device that allows for the change between an active and inactive position of the spikes is presented. The traction performance of a compact articulated tractor with the spike device was tested on a grass plot with two soil moisture contents (SMC). The highest difference in the drawbar pull in the range from 14.2% to 40.5% and from 17.1% to 36.8% was reached by the spikes in the active position in comparison with the tires without spikes, which were at the slip range from 45% to 5% in the case of the low SMC when the test tractor was in the 3rd and 1st gear. The motion resistance difference between the spikes in the active position and the tires without spikes was 11.8% and 2.5% at the low and medium SMC, respectively. At the low and medium SMC, the highest tractive efficiency of 0.765 (0.721) and 0.757 (0.731) was reached by the spikes in the active position when the test tractor was in the 1st (3rd) gear in comparison with 0.736 (0.7) and 0.723 (0.708) in the case of the tires without spikes. The results indicated that the spike device allowed for the improvement of tractor tractive performance.

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Analytical Description of Power Delivery Efficiency of Front Wheel Assist Tractor in Tillage Works

Cited by 14 publications

References 131 publications

Correlation between power harrow energy demand and tilled soil aggregate dimensions

Correlation between power harrow energy demand and tilled soil aggregate dimensions

Characterization of motion power loss of off‐road wheeled robot in a slippery terrain

Spike Device with Worm Gear Unit for Driving Wheels to Improve the Traction Performance of Compact Tractors on Grass Plots

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