Sistemas dinamicos e controladores fuzzy : um estudo da dispersão da Morte Subita dos Citros em São Paulo / Dynamic systems and fuzzy controllers : a study of the dispersion of the Citrus Sudden Death in São Paulo

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Citrus Sudden Death is a relatively new disease that has affected and killed sweet oranges grafted on the Rangpur lime. This is a worrying characteristic because the Rangpur lime amounts to 85% of the citrus orchards in São Paulo and the south of "Triângulo Mineiro". It is believed that the disease is caused by a virus transmitted by citrus aphids (vectors). We have adopted the Cellular Automata model to study the advance of the disease, which considers the effect of the wind in the distances reached by the aphids. We have adopted the rule-based fuzzy system to establish the relationship between the space covered by the vector and the intensity of the wind. To study the population density of aphids, we have considered that the ladybug is its main enemy. The trajectories of the phase-plane are compared to those of deterministic predatorprey models of the Holling- Tanner and Lotka- Volterra types. From the obtained results, we have begun a study to investigate some control policies for the Citrus Sudden Death

ASSUNTO(S)

automato celular sistemas de controle biologico fuzzy sets fuzzy systems sistemas difusos cellular automata conjuntos difusos biological control systems

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