Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81617
Type: Artigo de periódico
Title: Optimal header height control system for combine harvesters
Author: Lopes, GT
Magalhaes, PSG
Nobrega, EGO
Abstract: Automatic control of header height has been employed in combine harvesters as a means to reduce harvest losses, operator fatigue and the risks of equipment damage. State-of-the-art combine harvesters usually incorporate on-off controllers to keep the header at the desired height. The fixed control signals and the relatively broad dead-bands required for stabilization of this type of controller impose serious limitations on the performance of such systems. This paper describes an alternative control system aiming to improve the performance of combine harvesters in following the soil profile. The linear quadratic Gaussian with loop transfer recovery (LQG/LTR) method has been used to design a robust and optimal header height controller. The results obtained indicate that the use of the LQG/LTR controller can significantly improve the disturbance rejection capacity of the system, while keeping its energy expenditure levels unchanged with respect to the conventional on-off system. (C) 2002 Silsoc Research Institute. Published by Elsevier Science Ltd. All rights reserved.
Country: EUA
Editor: Academic Press Inc Elsevier Science
Rights: fechado
Identifier DOI: 10.1006/bioe.2001.0016
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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