Vibration analysis on driver’s seat of agricultural tractors during tillage tests

Abstract

The vibration of the driver's seat of agricultural tractors was investigated during three alternative tillage operations. Three tractors including a range of specifications were considered, at a range of forward speeds. The interactions between the tractors, implements and speeds were examined using the SPSS program and the GLM-ANOVA method. The results analysis indicated that the tractors played the first major role in vibration development in the lateral axis and was followed by the implements. In contrast, the implements played the first major role in the development of vibration in the horizontal axis and are followed by factor tractors. The statistically significant effect in vertical and horizontal axes shows the factor implements. In addition, the statistically significant effect in the vertical and lateral axes shows again the implements to be the most significant factor. Of the implements, the plough shows the highest vibration and displays statistically significant difference in comparison with the other implements.

Vibration levels emitted by agricultural tractors

“…If based on the vibration parameters suggested by Gialamas et al (2016), all the tractors studied need improvement (decrease) in the vibration values to which the operators of these machines are exposed. The vibration levels were typically below the limits established for 8 h of work at frequencies of 5 to 10 Hz for the three directions (az-axis, ax-axis and ay-axis) in all of the studied tractors.…”

A Review on Ergonomics in Agriculture. Part II: Mechanized Operations

“…The influence of implements, which can be added to the tractor, on the vibration levels was studied by [18,58]. In [18], the longitudinal WBV occurring in tractors having a large square baler was assessed.…”

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“…Porém, ainda em comparação aos avanços alcançados no desempenho dos tratores, a proteção e o conforto do operador em relação à vibração continuam insatisfatórios (THORAT e MHASKE, 2016). Gialamas et al (2016) sugeriram a utilização de assentos inteligentes munidos com sistemas eletro-hidráulicos e de suspensão a ar com controle eletrônico da altura de deslocamento e ajuste dinâmico da rigidez da suspensão.…”

“…Esses autores encontraram os maiores níveis de vibração na faixa de frequência de 2 a 4 Hz, sendo que os resultados apontam a necessidade de um projeto de assento direcionado ao conforto do operador. Gialamas et al (2016) em seus ensaios de campo, determinaram que o trator foi o principal componente que determinou a variação das acelerações que ocorrem no eixo Y no assento do operador, enquanto os equipamentos afetaram principalmente as vibrações ocorrentes no eixo X. Esses autores recomendaram uma seleção adequada de cada equipamento agrícola ao trator empregado para minimizar a vibração criada durante o preparo do solo.…”