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Non-linear adaptive temperature and humidity control in animal buildings

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dc.contributor.author Daskalov, PI en
dc.contributor.author Arvanitis, KG en
dc.contributor.author Pasgianos, GD en
dc.contributor.author Sigrimis, NA en
dc.date.accessioned 2014-03-01T01:24:45Z
dc.date.available 2014-03-01T01:24:45Z
dc.date.issued 2006 en
dc.identifier.issn 1537-5110 en
dc.identifier.uri http://hdl.handle.net/123456789/17415
dc.subject.classification Agricultural Engineering en
dc.subject.other Actuators en
dc.subject.other Buildings en
dc.subject.other Computer simulation en
dc.subject.other Damping en
dc.subject.other Environmental impact en
dc.subject.other Humidity control en
dc.subject.other Nonlinear control systems en
dc.subject.other Animal buildings en
dc.subject.other Non-linear compensation en
dc.subject.other Nonlinear damping en
dc.subject.other Parametric uncertainties en
dc.subject.other Climate control en
dc.subject.other Animalia en
dc.title Non-linear adaptive temperature and humidity control in animal buildings en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.biosystemseng.2005.09.006 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.biosystemseng.2005.09.006 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract Climate control for housed animals is of substantial importance but it is also a difficult and complicated task. The animals in a livestock building affect temperature and humidity conditions inside the building in a nonlinear way, and add long time constants to the system response. Moreover, the inherent coupling of temperature and humidity through psychrometric laws as well as the thermally dynamic, nature of livestock buildings suggest that disturbance attenuation (load control of external environmental conditions, heat emanated by the animals and water-vapour production of animals) is far more important than is the case of other types of buildings. To settle these concerns, a non-linear control design method, resulting in an inherently robust adaptive non-linear proportional integral control law for simultaneous temperature/ humidity control of livestock buildings in both summer and winter conditions, is presented in this paper. The proposed method, successfully tested here through extensive simulation, relies on: (a) a model-based feedback/ feed-forward compensation of measured external disturbances on the basis of input-output linearisation, decoupling and Lyapunov theory; (b) a robust non-linear compensation of unknown external system disturbances and parametric uncertainties, on the basis of non-linear damping terms, to guarantee small output deviations from desired set-point values; and (c) an adaptive non-linear control law incorporating integral action to cope for parametric model uncertainty and unknown disturbances and to guarantee zero steady-state offset in the system response. Its ability to track varying set-points provides the possibility to combine it with higher level control modules useful for the transformation of user-defined settings for temperature and humidity into feasible controller set-points, taking into account the constraints imposed by the capacities of the actuators, the psychrometric laws, animal welfare, etc. The proposed method is applicable to any air-conditioning system and is expected to gain wide acceptance in modern climate control systems. (c) 2005 Published by Elsevier Ltd on behalf of Silsoe Research Institute. en
heal.publisher ACADEMIC PRESS INC ELSEVIER SCIENCE en
heal.journalName Biosystems Engineering en
dc.identifier.doi 10.1016/j.biosystemseng.2005.09.006 en
dc.identifier.isi ISI:000235242500001 en
dc.identifier.volume 93 en
dc.identifier.issue 1 en
dc.identifier.spage 1 en
dc.identifier.epage 24 en


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