Simulação da capacidade de tração de um trator 4x2 com tração dianteira auxiliar em diferentes condições de superfície

• Autor(a) principal: Barros, Pedro Renato Pereira
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/733
• topic: Capacidade de tração; Simulação matemática; Modelo; Traction capacity; Simulation mathematics; Model; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA

Mathematical modeling has been used often to predict the performance of agricultural machinery. It is possible through models to simulate the performance of tractors and determine the best conditions of use, reducing cost and increasing productivity. The objective of this study was to verify and validate a mathematical model to determine the traction capacity of a tractor in different soil conditions and load on the drawbar. Fiel tests were performed using a tractor with front wheel assist (TDA), equipped with bias tires on different surfaces. The tractor was instrumented to obtain experimental data, such as: travel reduction rate of the front and rear wheels, travel speed of the tractor and engine speed. These data were compared with those simulated by the implemented model to evaluate the consistency and compatibility between them. The results showed that the model simulates satisfactorily traction capacity of the tractor. For all tests the correlation between simulated and observed values was above 94%, the relative deviation of the 49% of the tests was below 10%. These results indicate that the simulation model can be used as a tool to predict the performance of agricultural tractor, helping farmers and manufacturers to find the best working conditions of a tractor.