Improving olive mechanical harvesting using appropriate natural frequency

Improving olive mechanical harvesting using appropriate natural frequency

The good performance of olive mechanical harvesting by shaking depends on the suitable values of limb vibrator operating parameters (frequency and amplitude). Mathematical models of a single degree of freedom (S.D.F.M) and two degrees of freedom (T.D.F.M) were used to estimate the natural frequency...

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Main Authors: Ahmed Alzoheiry, Mohamed Ghonimy, Eid Abd El Rahman, Ossama Abdelwahab, Ahmed Hassan
Format: Article
Language:English
Published: PAGEPress Publications 2020-09-01
Series:Journal of Agricultural Engineering
Subjects:
Fruit removal
natural frequency
olive
selectivity
vibration.
Online Access:https://www.agroengineering.org/index.php/jae/article/view/1057
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spelling doaj-f814ff97ac604f778453a2ac893a9c222020-11-25T03:14:03ZengPAGEPress PublicationsJournal of Agricultural Engineering1974-70712239-62682020-09-0151310.4081/jae.2020.1057Improving olive mechanical harvesting using appropriate natural frequencyAhmed Alzoheiry0Mohamed Ghonimy 1Eid Abd El Rahman2Ossama Abdelwahab3Ahmed Hassan4Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah, Saudi Arabia; Department of Natural Resources and Agricultural Engineering, Faculty of Agriculture, Damanhour University, DamanhourDepartment of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah, Saudi Arabia; Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, CairoDepartment of Agricultural Engineering, Faculty of Agriculture, Cairo University, CairoDepartment of Agricultural Engineering, Faculty of Agriculture, Cairo University, CairoDepartment of Agricultural Engineering, Faculty of Agriculture, Cairo University, Cairo The good performance of olive mechanical harvesting by shaking depends on the suitable values of limb vibrator operating parameters (frequency and amplitude). Mathematical models of a single degree of freedom (S.D.F.M) and two degrees of freedom (T.D.F.M) were used to estimate the natural frequency (FN) of olive fruit stem system. The results from these models indicated that the FN values were 33.9, 31.9, and 28.0 Hz for the full mature stage, half-ripe olive, and full-ripe olive respectively. Branch vibrator was operated at three levels of frequency 25, 30 and 35 Hz and 3 levels of amplitude 25, 30 and 35 mm at a vibration time of 10 s. Measurements covered the fruit removal percentage (FRP) and degree of full-ripe fruit selectivity (DS). The results showed that the maximum FRP value, 90.6%, was achieved at a frequency of 35 Hz and amplitude of 25 mm while the maximum DS value, 78.58%, was obtained at 25 Hz frequency and 25 mm amplitude. https://www.agroengineering.org/index.php/jae/article/view/1057Fruit removalnatural frequencyoliveselectivityvibration.
collection DOAJ
language English
format Article
sources DOAJ
author Ahmed Alzoheiry
Mohamed Ghonimy
Eid Abd El Rahman
Ossama Abdelwahab
Ahmed Hassan
spellingShingle Ahmed Alzoheiry
Mohamed Ghonimy
Eid Abd El Rahman
Ossama Abdelwahab
Ahmed Hassan
Improving olive mechanical harvesting using appropriate natural frequency
Journal of Agricultural Engineering
Fruit removal
natural frequency
olive
selectivity
vibration.
author_facet Ahmed Alzoheiry
Mohamed Ghonimy
Eid Abd El Rahman
Ossama Abdelwahab
Ahmed Hassan
author_sort Ahmed Alzoheiry
title Improving olive mechanical harvesting using appropriate natural frequency
title_short Improving olive mechanical harvesting using appropriate natural frequency
title_full Improving olive mechanical harvesting using appropriate natural frequency
title_fullStr Improving olive mechanical harvesting using appropriate natural frequency
title_full_unstemmed Improving olive mechanical harvesting using appropriate natural frequency
title_sort improving olive mechanical harvesting using appropriate natural frequency
publisher PAGEPress Publications
series Journal of Agricultural Engineering
issn 1974-7071
2239-6268
publishDate 2020-09-01
description The good performance of olive mechanical harvesting by shaking depends on the suitable values of limb vibrator operating parameters (frequency and amplitude). Mathematical models of a single degree of freedom (S.D.F.M) and two degrees of freedom (T.D.F.M) were used to estimate the natural frequency (FN) of olive fruit stem system. The results from these models indicated that the FN values were 33.9, 31.9, and 28.0 Hz for the full mature stage, half-ripe olive, and full-ripe olive respectively. Branch vibrator was operated at three levels of frequency 25, 30 and 35 Hz and 3 levels of amplitude 25, 30 and 35 mm at a vibration time of 10 s. Measurements covered the fruit removal percentage (FRP) and degree of full-ripe fruit selectivity (DS). The results showed that the maximum FRP value, 90.6%, was achieved at a frequency of 35 Hz and amplitude of 25 mm while the maximum DS value, 78.58%, was obtained at 25 Hz frequency and 25 mm amplitude.
topic Fruit removal
natural frequency
olive
selectivity
vibration.
url https://www.agroengineering.org/index.php/jae/article/view/1057
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AT eidabdelrahman improvingolivemechanicalharvestingusingappropriatenaturalfrequency
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