VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING

ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras,...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Geice P. Villibor [verfasserIn] Fábio L. Santos [verfasserIn] Daniel M. Queiroz [verfasserIn] Joseph K Khoury Junior [verfasserIn] Francisco A. C. Pinto [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Spanisch ; Portugiesisch

Erschienen:	2023

Schlagwörter:	coffee harvesting mechanical vibrations selective harvesting harmonic excitation

Übergeordnetes Werk:	In: Engenharia Agrícola - Sociedade Brasileira de Engenharia Agrícola, 2005, 43(2023), 1
Übergeordnetes Werk:	volume:43 ; year:2023 ; number:1

Links:	Link aufrufen Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1590/1809-4430-eng.agric.v43n1e20210201/2023

Katalog-ID:	DOAJ088709949

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allfields	10.1590/1809-4430-eng.agric.v43n1e20210201/2023 doi (DE-627)DOAJ088709949 (DE-599)DOAJcf585afdf89240cd8a29ebcd432d686c DE-627 ger DE-627 rakwb eng spa por S1-972 Geice P. Villibor verfasserin aut VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting. coffee harvesting mechanical vibrations selective harvesting harmonic excitation Agriculture (General) Fábio L. Santos verfasserin aut Daniel M. Queiroz verfasserin aut Joseph K Khoury Junior verfasserin aut Francisco A. C. Pinto verfasserin aut In Engenharia Agrícola Sociedade Brasileira de Engenharia Agrícola, 2005 43(2023), 1 (DE-627)483300713 (DE-600)2182578-6 01006916 nnns volume:43 year:2023 number:1 https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210201/2023 kostenfrei https://doaj.org/article/cf585afdf89240cd8a29ebcd432d686c kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162023000100208&lng=en&tlng=en kostenfrei http://www.scielo.br/pdf/eagri/v43n1/1809-4430-eagri-43-01-e20220201.pdf kostenfrei https://doaj.org/toc/0100-6916 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 43 2023 1
spelling	10.1590/1809-4430-eng.agric.v43n1e20210201/2023 doi (DE-627)DOAJ088709949 (DE-599)DOAJcf585afdf89240cd8a29ebcd432d686c DE-627 ger DE-627 rakwb eng spa por S1-972 Geice P. Villibor verfasserin aut VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting. coffee harvesting mechanical vibrations selective harvesting harmonic excitation Agriculture (General) Fábio L. Santos verfasserin aut Daniel M. Queiroz verfasserin aut Joseph K Khoury Junior verfasserin aut Francisco A. C. Pinto verfasserin aut In Engenharia Agrícola Sociedade Brasileira de Engenharia Agrícola, 2005 43(2023), 1 (DE-627)483300713 (DE-600)2182578-6 01006916 nnns volume:43 year:2023 number:1 https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210201/2023 kostenfrei https://doaj.org/article/cf585afdf89240cd8a29ebcd432d686c kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162023000100208&lng=en&tlng=en kostenfrei http://www.scielo.br/pdf/eagri/v43n1/1809-4430-eagri-43-01-e20220201.pdf kostenfrei https://doaj.org/toc/0100-6916 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 43 2023 1
allfields_unstemmed	10.1590/1809-4430-eng.agric.v43n1e20210201/2023 doi (DE-627)DOAJ088709949 (DE-599)DOAJcf585afdf89240cd8a29ebcd432d686c DE-627 ger DE-627 rakwb eng spa por S1-972 Geice P. Villibor verfasserin aut VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting. coffee harvesting mechanical vibrations selective harvesting harmonic excitation Agriculture (General) Fábio L. Santos verfasserin aut Daniel M. Queiroz verfasserin aut Joseph K Khoury Junior verfasserin aut Francisco A. C. Pinto verfasserin aut In Engenharia Agrícola Sociedade Brasileira de Engenharia Agrícola, 2005 43(2023), 1 (DE-627)483300713 (DE-600)2182578-6 01006916 nnns volume:43 year:2023 number:1 https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210201/2023 kostenfrei https://doaj.org/article/cf585afdf89240cd8a29ebcd432d686c kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162023000100208&lng=en&tlng=en kostenfrei http://www.scielo.br/pdf/eagri/v43n1/1809-4430-eagri-43-01-e20220201.pdf kostenfrei https://doaj.org/toc/0100-6916 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 43 2023 1
allfieldsGer	10.1590/1809-4430-eng.agric.v43n1e20210201/2023 doi (DE-627)DOAJ088709949 (DE-599)DOAJcf585afdf89240cd8a29ebcd432d686c DE-627 ger DE-627 rakwb eng spa por S1-972 Geice P. Villibor verfasserin aut VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting. coffee harvesting mechanical vibrations selective harvesting harmonic excitation Agriculture (General) Fábio L. Santos verfasserin aut Daniel M. Queiroz verfasserin aut Joseph K Khoury Junior verfasserin aut Francisco A. C. Pinto verfasserin aut In Engenharia Agrícola Sociedade Brasileira de Engenharia Agrícola, 2005 43(2023), 1 (DE-627)483300713 (DE-600)2182578-6 01006916 nnns volume:43 year:2023 number:1 https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210201/2023 kostenfrei https://doaj.org/article/cf585afdf89240cd8a29ebcd432d686c kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162023000100208&lng=en&tlng=en kostenfrei http://www.scielo.br/pdf/eagri/v43n1/1809-4430-eagri-43-01-e20220201.pdf kostenfrei https://doaj.org/toc/0100-6916 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 43 2023 1
allfieldsSound	10.1590/1809-4430-eng.agric.v43n1e20210201/2023 doi (DE-627)DOAJ088709949 (DE-599)DOAJcf585afdf89240cd8a29ebcd432d686c DE-627 ger DE-627 rakwb eng spa por S1-972 Geice P. Villibor verfasserin aut VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting. coffee harvesting mechanical vibrations selective harvesting harmonic excitation Agriculture (General) Fábio L. Santos verfasserin aut Daniel M. Queiroz verfasserin aut Joseph K Khoury Junior verfasserin aut Francisco A. C. Pinto verfasserin aut In Engenharia Agrícola Sociedade Brasileira de Engenharia Agrícola, 2005 43(2023), 1 (DE-627)483300713 (DE-600)2182578-6 01006916 nnns volume:43 year:2023 number:1 https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210201/2023 kostenfrei https://doaj.org/article/cf585afdf89240cd8a29ebcd432d686c kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162023000100208&lng=en&tlng=en kostenfrei http://www.scielo.br/pdf/eagri/v43n1/1809-4430-eagri-43-01-e20220201.pdf kostenfrei https://doaj.org/toc/0100-6916 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 43 2023 1
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callnumber-first	S - Agriculture
author	Geice P. Villibor
spellingShingle	Geice P. Villibor misc S1-972 misc coffee harvesting misc mechanical vibrations misc selective harvesting misc harmonic excitation misc Agriculture (General) VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING
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topic_title	S1-972 VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING coffee harvesting mechanical vibrations selective harvesting harmonic excitation
topic	misc S1-972 misc coffee harvesting misc mechanical vibrations misc selective harvesting misc harmonic excitation misc Agriculture (General)
topic_unstemmed	misc S1-972 misc coffee harvesting misc mechanical vibrations misc selective harvesting misc harmonic excitation misc Agriculture (General)
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title	VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING
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title_full	VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING
author_sort	Geice P. Villibor
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author_browse	Geice P. Villibor Fábio L. Santos Daniel M. Queiroz Joseph K Khoury Junior Francisco A. C. Pinto
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title_sort	vibration transmissibility of the coffee fruit-peduncle system: a forced vibration study of high frequency aiming mechanical harvesting
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title_auth	VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING
abstract	ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting.
abstractGer	ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting.
abstract_unstemmed	ABSTRACT Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting.
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title_short	VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING
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author2	Fábio L. Santos Daniel M. Queiroz Joseph K Khoury Junior Francisco A. C. Pinto
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