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

Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy impact to achieve detachment coffee fruits. The aim this study was evaluate vibration transmissibility in fruit-peduncle systems, using high-speed cameras, submitted high frequency harmonic excitation different combinations between amplitude vibration, identifying working ranges suitable perform selective harvesting. Vibration determined for maturation stages unripe ripe were subjected a sinusoidal displacement, which input parameters (35, 45 55 Hz) peak-to-peak (3.5, 5.0 6.5 mm). An experiment used effect on completely randomized design factorial scheme 3 x 2, with three replications. 35 Hz, associated amplitudes 3.5-6.5 mm, one most influenced results transmissibility. For Hz stage, higher than 1.0, could be combination