Application of herbicides to floating rate using predictive control / Aplicação de herbicidas a taxas variáveis utilizando controle preditivo

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The objective of this project is to study a predictive controller for a herbicides injection system with variable rates where the herbicide and water are placed in different recipients and sent to a mixer. A strategy to generate the reference for the predictive controller characterizes the system as hybrid because there are two modes of operation for the herbicide injection system. The generated reference has the finality of decreasing the effects of the delay time of the system caused by the lenght of the tubes between the mixer and the dispersion nozzles. The application areas and the correct concentration for them, will be obtained by previous designed statistic maps. These maps describle de spacial variability of the weeds as the concentration required to eliminate them. The main goal is the optimum control of the process, spreading only the necessary quantity of herbicides. The predictive controller is efficient to lower the costs and to protect the operator and preserve the environment against the impacts of excess of herbicides in the soil. Results of simulations using mathematical models to obtain herbicide rates are presented to show the efficiency of the implemented predictive controller.

ASSUNTO(S)

weed control precision agricuture injection plantas daninhas controle preditivo predictive control injeção agricultura de precisão

ACESSO AO ARTIGO

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