Auger-type granular fertylizer distributor: matemathical model and dynamic simulation

Engenharia Agrícola

Angel P. Garcia¹  Nelson L. Cappelli²  Claudio K. Umezu¹ 

[1] ,UNICAMP Faculdade de Engenharia Agrícola Campinas SP

关键词: seeder fertilizer drill;    modeling;    precision agriculture;    semeadora-adubadora;    modelagem matemática;    agricultura de precisão;   

DOI  :  10.1590/S0100-69162012000100016

来源: SciELO

【 摘 要 】

The objective of this study was to model mathematically and to simulate the dynamic behavior of an auger-type fertilizer applicator (AFA) in order to use the variable-rate application (VRA) and reduce the coefficient of variation (CV) of the application, proposing an angular speed controller θ' for the motor drive shaft. The input model was θ' and the response was the fertilizer mass flow, due to the construction, density of fertilizer, fill factor and the end position of the auger. The model was used to simulate a control system in open loop, with an electric drive for AFA using an armature voltage (V A) controller. By introducing a sinusoidal excitation signal in V A with amplitude and delay phase optimized and varying θ' during an operation cycle, it is obtained a reduction of 29.8% in the CV (constant V A) to 11.4%. The development of the mathematical model was a first step towards the introduction of electric drive systems and closed loop control for the implementation of AFA with low CV in VRA.

【 授权许可】

CC BY   
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