Abstract:RESUMOA fim de quantificar-se e analisar-se corretamente a relação máquina agrícola-solo faz-se necessário a aquisição de dados que sejam ao mesmo tempo precisos, confiáveis, de fácil e rápida obtenção. Tal tarefa vem a ser facilitada por meio da utilização de equipamentos eletrônicos, os quais devem basear-se em três princípios básicos: precisão adequada, custo acessível e boa robustez. Devido, principalmente, ao fato das instrumentações disponíveis para a aquisição de dados com máquinas agrícolas serem de cu… Show more
ABSTRACT:The draft forces of soil engaging tines and theoretical analysis compared to existing mathematical models, have yet not been studied in Rio Grande do Sul soils. From the existing models, those which can get the closest fitting draft forces to real measure on field have been established for two of Rio Grande do Sul soils. An Albaqualf and a Paleudult were evaluated. From the studied models, those suggested by Reece, so called "Universal Earthmoving Equation", Hettiaratchi and Reece, and Godwin and Spoor were the best fitting ones, comparing the calculated results with those measured "in situ". Allowing for the less complexity of Reece's model, it is suggested that this model should be used for modeling draft forces prediction for narrow tines in Albaqualf and Paleudut.
ABSTRACT:The draft forces of soil engaging tines and theoretical analysis compared to existing mathematical models, have yet not been studied in Rio Grande do Sul soils. From the existing models, those which can get the closest fitting draft forces to real measure on field have been established for two of Rio Grande do Sul soils. An Albaqualf and a Paleudult were evaluated. From the studied models, those suggested by Reece, so called "Universal Earthmoving Equation", Hettiaratchi and Reece, and Godwin and Spoor were the best fitting ones, comparing the calculated results with those measured "in situ". Allowing for the less complexity of Reece's model, it is suggested that this model should be used for modeling draft forces prediction for narrow tines in Albaqualf and Paleudut.
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