A model for predicting soil-tool interaction

Swick, W.C.; Perumpral, John V.

doi:10.1016/0022-4898(88)90061-4

Cited by 88 publications

(35 citation statements)

References 11 publications

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“…4) show that this parameter is less dependent on geometric and dynamic properties of the blade, but greatly affected by consolidation of the soil. Swick & Perumpral (1988) stated that the relation between the draft force and the forward speed is affected by the inertia of the accelerated soil mass and the rate of shear by the tillage tool which are both dependent on the soil type and condition. In general, the acceleration of soil mass increases by increasing the forward speed and the result is an increase in draft force.…”

Section: Discussion Draft Force-working Depth Relationshipmentioning

confidence: 99%

The behavior of tillage tools with acute and obtuse lift angles

Abbaspour‐Fard¹,

Hoseini²,

Aghkhani³

et al. 2014

Span. j. agric. res.

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An experimental investigation was conducted to study the trend of draft force against forward speed and working depth for a range of lift angles beyond acute angles for a simple plane tillage tool. The experiments were performed in an indoor soil bin facility equipped with a tool carriage and a soil preparation unit propelled by an integrated hydraulic power system. The system was also equipped with electronic instrumentation including an Extended Octagonal Ring Transducer (EORT) and a data logger. The factorial experiment (4 × 3 × 3) with three replications was used based on Randomized Complete Block Design (RCBD). The independent variables were lift angle of the blade (45, 70, 90 and 120°), forward speed (2, 4 and 6 km h -1 ) and working depth (10, 25 and 40 cm). The variance analysis for the draft force shows that all independent variables affect the draft force at 1% level of significance. The trend of the draft force against working depth and forward speed had almost a linear increase. However, the trend of the draft force against the lift angle is reversed for lift angles > 90°. This finding, conflicts with the results of analytical and numerical studies which extrapolate the results achieved for acute lift angles to obtuse lift angles and have not been reported experimentally.

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Section: Discussion Draft Force-working Depth Relationshipmentioning

confidence: 99%

The behavior of tillage tools with acute and obtuse lift angles

Abbaspour‐Fard¹,

Hoseini²,

Aghkhani³

et al. 2014

Span. j. agric. res.

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“…The calculation of the draft force is based on the earth moving equation [15] with necessary modifications as shown in the Fig. 4.…”

Section: Draft Force Calculationmentioning

confidence: 99%

Design and Development of a Landmines Removal Robot

Hemapala

Razzoli

2012

International Journal of Advanced Robotic Systems

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Humanitarian demining is a calamity of war affecting many third world countries. Mines are cheap weapons, built to sustain horrible injuries that target active people with a knock-on effect upon economic growth. The clearing is time consuming and expensive. Clearing is an engineering duty and the humanitarian goal is a technical challenge. Advanced robotics fulfils this task cleanly and reliably on the condition that upgrades and cost are met, meaning that they lose third-world appropriateness. The challenge is to turn local machines and awareness into effective robotic aids, willingly used by the local people, and to enhance the on-going outcomes.The solution to the demining problem shall be a low cost robotic outfit with resort to nearby available resources and competences (e.g., drawn from the local agricultural machinery and know-how). This paper discusses an ongoing project that aims to develop a low-cost robot with intelligent remote-command abilities, as a cheap productivity upgrading, assembled from standard farming devices, through the shared know-how and commitment of locally involved operators. During the study, the authors have developed a low-cost robot capable of removing mines. The robot consists of modified agricultural components including its mobile carrier and the mine effector.

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“…Though the application of existing numerical techniques like FEM and ANN have been found to predict the soil-tool system in a better approximation to the exact solution, soils have been considered for static analysis and the mass soil deformations have been ignored. Recently, a few studies [32][33][34] based on numerical methods have been conducted using FEM with the dynamic perspective of tillage. However, in this case, prior knowledge of shear strain at failure for determining the position of a shear failure boundary is required.…”

Section: Dynamic Modelingmentioning

confidence: 99%