Manufacturing and performance evaluation of a tractor-mounted olive harvesting machine

Altermzey, Gamal

doi:10.21608/ejar.2021.46468.1031

Cited by 3 publications

References 5 publications

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Power requirements for olive mechanical harvesting using trunk shaker

Ghonimy,

Ibrahim,

Helmy

et al. 2024

Sci Rep

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A mathematical analysis was conducted to predict the power requirements of the olive trunk shaker. The predicted required power of the olive trunk shaker is influenced by shaking displacement, fruit detachment force, fruit mass, stem length, damping ratio, unbalanced mass of the tree shaker, and exciting shaking frequency. The Olive trunk shaker was tested in the field at five attachment heights, 400, 500, 600, 700, and 800 mm, and six levels of olive trunk diameter: 78, 84, 101, 143, 158, and 186 mm. The results indicated that the theoretical shaking power was 12.8 kW while the actual required shaking power ranged from 7.1 to 17.8 kW, with an average of 12.6 kW due to variations in tree trunk diameters and different attachment heights. Multiple regression using the least squares method was employed to establish a statistical relation between the theoretical equation and the actual required power as a function of the clamp attachment height and trunk diameter. The regression coefficient of the predicted equation was 93.6% for attachment height values between 400 and 800 mm and tree trunk diameter values between 78 and 186 mm, with a mean absolute error of the prediction model was 0.5009 kW.

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Power requirements for olive mechanical harvesting using trunk shaker

Ghonimy,

Ibrahim,

Helmy

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

Power Requirements for Olive Mechanical Harvesting Using Trunk Shaker

Ghonimy,

Ibrahim,

Helmy

et al. 2024

Preprint

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A mathematical analysis was done to predict the power requirements of the olive trunk shaker. The predicted required power of the olive trunk shaker is affected by shaking displacement, fruit detachment force, fruit mass, stem length, damping ratio, unbalanced mass of tree shaker, and exciting shaking frequency. The Olive trunk shaker was tested in the field at three attachment heights, 400, 600, and 800 mm, and six levels of olive trunk diameter: 78, 84, 101, 143, 158, and 186 mm. The results showed that the theoretical shaking power was 12.8 kW while the actual required shaking power ranged between 8.4 to 16.7 kW, with an average of 12.7 kW due to differences in tree trunk diameters and different attachment heights. Multiple regression using the least square method was used to find a statistical relation between the theoretical equation and the actual required power as a function of the clamp attachment height and the trunk diameter. The regression coefficient of the predicted equation was 91.2% for attachment height values between 400 and 800 mm and tree trunk diameter values between 78 and 186mm, and the mean absolute error of the prediction model was 0.5174 kW.

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Development of Olive Harvesting Machine by Shaking

GHONİMY

Younis

GHONİEM³

2022

Turkish Journal of Agricultural Engineering Research

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Olive harvesting machine by shaking was developed and fabricated using local materials with required specifications. The developed elements were frame and hitch, gear assembly, input and transmission shafts, vibrating unit, connecting rod, limb clamp, and transmission system. This research work aimed to evaluate the developed olive harvester capable to perform harvesting operation in the proper time using the tractor as the available economic source of power. Measurements covered the properties of olive fruit, stem, and limb for five olive varieties: Agizi, Manzanillo, Picholine, Kalamata and Arbiquen. The developed harvester was tested at three levels of frequency; 3.3, 6.7, and 10 Hz, four levels of stroke; 40, 80, 120, and 160 mm, and three levels of shaking time 60, 120 and 180 s. Results indicated that the effective range to attach the clamp on the olive limb were 30 to 40% of limb length. The average value of the maximum bending stress affecting the limb and limb deflection were 16.5 MPa and 196.6 mm respectively. In addition, results have provided the suitability of the developed shaker to harvest olive fruit. The suitability of the developed machine was judged through the fruit removal percentage. The values of performance parameters of olive harvester were 10 Hz optimum shaking frequency, 120 mm of stroke, and 120 s of shaking time.

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Manufacturing and performance evaluation of a tractor-mounted olive harvesting machine

Cited by 3 publications

References 5 publications

Power requirements for olive mechanical harvesting using trunk shaker

Power requirements for olive mechanical harvesting using trunk shaker

Power Requirements for Olive Mechanical Harvesting Using Trunk Shaker

Development of Olive Harvesting Machine by Shaking

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