Estudio, diseño e implementación de esquemas de control para procesos no lineales : Diseño e implementación mediante “hardware in the loop” de controladores aplicados al modelo de un invernadero.

Abstract

In the present work, the mathematical modeling of a greenhouse is presented together with its validation through the comparison of the results obtained with real measured data, for which a statistical analysis is performed based on the root mean square error (RMSE). An approximation of the mathematical model to a reduced order model is obtained, which will allow the tuning and design of PID, SMC and selective control schemes, the first two schemes are focused on temperature control, while the last mentioned scheme is oriented to control both temperature and humidity. We work under the concept of hardware in the loop, for which the discretized controllers will be implemented in an Arduino Mega 2560 board that will communicate through serial communication with the simulation software Simulink of Matlab ® where the mathematical model of the greenhouse is simulated along with its reference changes and disturbances corresponding to real data. A differentiation is made as to which control scheme shows the best results based on the analysis of the data obtained, taking as reference certain parameters such as maximum overshoot (Mp), settling time (ts) and performance indexes (ISE, ISCO).