Luis José Yebra

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This paper deals with the modelling and simulation of greenhouse climate. The obtaining of greenhouse production models (climate, crop development, etc.) is a subject of large interest nowadays, as these models can be used for simulation, control and production optimization purposes. A greenhouse constitutes a complex dynamical system, which is described in(More)
This paper presents the development of mixed feedforward-adaptive controllers for greenhouse climate control. These controllers are based on both simplified physical laws and on-line measured data and are discussed in terms of their suitability for adaptive control purposes. The schemes are tested using a highly nonlinear model of a typical Mediterranean(More)
Bond graphs are a natural method for representing power flows in physical systems and they represent the most basic graphical paradigm that is still fully object-oriented. This paper describes a new version of BondLib, the Modelica bond graph library. The library was created for Modelica with graphical Dymola support, and its object-oriented design allows(More)
Solar power plants should collect any available thermal energy in a usable form at the desired temperature range. Efficient operation requires a fast start-up and reliable operation in varying cloudy conditions without unnecessary shutdowns and start-ups. Fast and well damped linguistic equation (LE) controllers have been tested in Spain at a collector(More)