Real-time parameter estimation of dynamic temperature models for greenhouse environmental control

• Autor(a) principal: Cunha, J. B.
• Data de Publicação: 1997
• Outros Autores: Couto, C., Ruano, Antonio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.1/2181
• topic: Agriculture; Dynamic models; Identification algorithms; Parameter estimation; Real-time

For a greenhouse located at UTAD-University, the methods used to estimate (in real-time) the parameters of the inside air temperature model will be described. The structure and the parameters of the climate discrete-time dynamic model were previously identified using data acquired during two different periods of the year. Several experiments showed that the second-order models identified achieve a close agreement between simulated and experimental data. Later, it was found that parameters change with varying operational conditions. Thus, for an efficient use of these models in real-time control, a recu~ive identification technique was implemented for the estimation of the parameters.