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Ingeniería e Investigación

Print version ISSN 0120-5609


RUIZ PALACIOS, Fredy Orlando  and  COTRINO BADILLO, Carlos Eduardo. Identifying a greenhouse climate model by using subspace methods. Ing. Investig. [online]. 2010, vol.30, n.2, pp.157-167. ISSN 0120-5609.

This paper presents the development of a climate dynamics model for a greenhouse located on the Bogota plateau. A black-box model was estimated from experimental data, considering a novel system structure derived from a first principles model and experimental tests. It considered two control volumes, one given by the air over the crop and a second one formed by the air trapped by crop foliage. The model was selected from a set of linear, discrete-time, statevariable systems using subspace identification methods. The estimated system was able to predict climate dynamics for both control volumes, having errors below 8%. Such performance was comparable to previous work reported in literature while the obtained model was a low-complexity linear system

Keywords : parametric estimation; subspace identification; greenhouse climate model.

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