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Développement de systèmes actifs d'épandage prenant en compte la dynamique du véhicule porteur et le relief du terrain

Abstract : Non-flat fields represent a disturbance for fertilizer spreading, that is not handled yet by centrifugal spreaders. To bridge this gap, a new control device is proposed. A model is build first to derive application rate maps highlighting application errors in several cases. It uses an updating technique of ballistic flights initial conditions, taking into account the tractor orientation. The simulations conducted show that overapplication and underapplication may reach ±40%, and that they stem from altered particles range compared to that on a flat field. Irregular fields are the most affected due to the difference between the tractor and spread surface inclination, while only the gravity acts on regular fields. These results allowed retaining a system based on discs inclination, because it can both correct the particles range and target the most affected areas. The control laws are deduced from solving an optimization problem. Its objective is minimizing the sum of quadratic range errors of a limited number of particles representative of the static the spread pattern deformation. This approach allows reducing the application errors to ±10%.
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https://tel.archives-ouvertes.fr/tel-01761394
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Submitted on : Monday, April 9, 2018 - 10:13:08 AM
Last modification on : Friday, July 10, 2020 - 7:58:59 AM

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  • HAL Id : tel-01761394, version 1

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El Mehdi Abbou-Ou-Cherif. Développement de systèmes actifs d'épandage prenant en compte la dynamique du véhicule porteur et le relief du terrain. Génie mécanique [physics.class-ph]. Université Clermont Auvergne, 2017. Français. ⟨NNT : 2017CLFAC051⟩. ⟨tel-01761394⟩

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